CN109354171A - A kind of efficient autotrophic denitrification system and operation method based on MBBR - Google Patents

A kind of efficient autotrophic denitrification system and operation method based on MBBR Download PDF

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CN109354171A
CN109354171A CN201811477694.2A CN201811477694A CN109354171A CN 109354171 A CN109354171 A CN 109354171A CN 201811477694 A CN201811477694 A CN 201811477694A CN 109354171 A CN109354171 A CN 109354171A
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reaction tank
valve
water
sieve
outlet
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CN109354171B (en
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吴迪
韩文杰
周家中
管勇杰
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Qingdao Si Purun Water Treatment Limited-Liability Co
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Qingdao Si Purun Water Treatment Limited-Liability Co
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/121—Multistep treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/22—O2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention discloses a kind of efficient autotrophic denitrification system and operation method based on MBBR, belong to wastewater biological denitrificaion technical field.Solves the problems such as related system inoculum concentration in the prior art is excessive, the starting time is long, nitric efficiency is low, system is influenced vulnerable to entering organic matter of water.The present invention couples denitrification with one-part form autotrophic denitrification, and denitrification pond is preposition, autotrophic denitrification effluent recycling, and the first stage realizes the removal of nitrate and organic matter, and second stage carries out autotrophic denitrification.Three kinds of operational modes, respectively parallel running mode, bi serie A operational mode and bi serie B operational mode can be achieved in the present invention, control four reaction tank water discharging directions by communicating valve and realize reaction tank series connection, arranged side by side or isolated operation；By be inoculated with, flow plus etc. means realize autotrophic denitrification technique quick start；According to processing requirement, different technology arrangement forms is realized.The present invention has many advantages, such as that inoculative proportion is small, starting is fast, nitric efficiency is high, good to entering organic matter of water tolerance.

Description

A kind of efficient autotrophic denitrification system and operation method based on MBBR
Technical field
The invention belongs to wastewater biological denitrificaion technical fields, and in particular to a kind of efficient autotrophic denitrification system based on MBBR And operation method.
Background technique
In the 1990s, while finding Anammox phenomenon, it was recognized that a kind of novel autotrophic denitrification work Skill is under anoxic conditions the microorganism that represents directly using nitrite as electron acceptor to float mould mesh bacterium, carbon dioxide is Primary carbon source, by ammonium oxidation at the biological denitrification process of nitrogen, since traditional biological denitrification process is in processing high-ammonia nitrogen low C/N Waste water limits nitrogen removal performance due to a lack of carbon source often, need to additionally add organic matter, to improve operating cost and easily make At secondary pollution risk, it is unfavorable for the operation of system safety economy, autotrophic denitrification technique, compared to traditional nitration denitrification technique With it is more a little, firstly, the Anammox reaction in autotrophic denitrification technique needs partial nitrification as pre-treating technology, According to its stoichiometric relationship, 62.5% keeping power consumption can be theoretically saved, and it adds organic carbon without additional Source saves the 100% increased operating cost of additional carbon institute, furthermore, sludge yield is few, saves sludge treatment expense With, finally, can not only reduce the excessive emissions of carbon dioxide isothermal chamber gas, carbon dioxide can be consumed instead, however certainly Supporting the theoretic nitrogen removal rate of denitrification process is 89%, and the project more demanding for water outlet total nitrogen is likely difficult to guarantee water outlet It is up to standard.
In order to further enhance nitrogen removal rate, denitrification coupling autotrophic denitrification technology gets more and more people's extensive concerning, main It wants process form to be divided into Prepositive denitrification and rear-mounted denitrification, for most of waste water, one can be more or less contained in water inlet Divide organic carbon source, when using postposition cooperative programs, organic matter initially enters the autotrophic denitrification stage, may cause shadow to it It rings, therefore has that researcher is preposition by the denitrification stage, effluent recycling is set, realize going for nitrate and organic matter in the first stage It removes, compared with rear-mounted denitrification, this associated form outlet water organic substance is easier to control, and can pass through autotrophic denitrification area aeration quantity Or the regulation of dissolved oxygen, most of organic matter is removed, while improving nitrogen removal rate, still, current most preposition anti-nitre Chemical industry skill need to carry out mud-water separation using granule sludge or anoxic sludge, water outlet, and longtime running easily leads to sludge yield mistake Greatly, frequent spoil disposal is needed, subsequent technique is had an impact in addition, sludge easily enters aftertreatment systems with water outlet, and is easy to happen Sludge bulking phenomenon, therefore, it is difficult to run steadily in the long term.And the front establishment method of biofilm compares activated sludge process work Skill microbiologic population is more abundant, and species diversity is more stable；It is larger and have good that particle is easily formed after biofilm detachment The wadding body of settling property, and there is preferable settling property, easily it is separated by solid-liquid separation；It is returned in addition, biofilm does not need sludge generally Stream, energy consumption is lower, it is easy to maintain and management and be not present sludge bulking problem.It is limited to pure embrane method front establishment method starting And technical bottleneck needed for stable operation, pure film denitrification still lack large-scale engineering application so far.
Currently rest on laboratory level about the research of one-part form autotrophic denitrification related process, main cause is autotrophy more Two kinds of functional microorganism ammonia oxidation bacterias (AOB) of denitrification process and anaerobic ammonia oxidizing bacteria (AnAOB) grow very slow, multiplication Time is longer, it is difficult to maintain higher biological concentration, and AnAOB is highly prone to the influence into restraining factors such as Organic substance in water and drops Low activity；AOB is aerobic bacteria, and AnAOB is anaerobic bacteria, and excessively high dissolved oxygen can inhibit AnAOB, and too low dissolved oxygen not can guarantee Ammonia nitrogen is to Nitrite transformation, and the too low AnAOB matrix that will lead to of nitrite is insufficient, and growth is suppressed.In addition, current is big Most one-part form autotrophic denitrification process systems also mostly use granule sludge form, cause it lower to the tolerance of dissolved oxygen (more For 1mg/L or less), slightly higher dissolved oxygen is easy to generate inhibition to AnAOB, or even makes system crash.In addition, one-part form autotrophy is de- Nitrogen granule sludge technique is difficult to realize the collaboration between the Nitrification of floc sludge and Anaerobic Ammonium Oxidation of Granular Sludge bacterium activity, Mud up-floating will cause anaerobic ammonia oxidizing bacteria and fall off and system performance degradation simultaneously.Given this technique drawback, can find suitable Autotrophic denitrification process form and quick start and high load capacity stable operation be the key that the technique becomes engineer application.
The research report of prior art related fields mainly has:
(sludge-digestion liquid that Wang Gang is based on nitrosation/anaerobic ammonia oxidation/denitrification (SNAD) technology simultaneously is de- by Wang Gang etc. Nitrogen technical study [D] Dalian University of Technology, 2017.) using restarting SNAD after first starting series connection nitrosation-anaerobic ammoxidation Mode handle Practical Project sludge-digestion liquid, start-up course first debugs starting nitrosation process, obtains stable suitable anaerobism Other two pilot reactor that is inoculated with into anaerobic ammonium oxidation tank after the water outlet of ammoxidation process, then in batches (provides respectively Provenance sludge and biofilm filler) anaerobic ammonium oxidation sludge cultivated in advance and biofilm MBBR filler, to anaerobic ammonium oxidation tank culture After obtaining more anaerobic ammonium oxidation sludge, the sludge and filler of nitrosation pond sludge and anaerobic ammonium oxidation tank are mixed, two ponds are opened Dynamic SNAD integral type technique.The pond project SNAD media-filling rate 35%, entire start-up course are inoculated with to anaerobic ammonium oxidation tank altogether Anaerobic ammonium oxidation sludge (dry weight) 20kg calculates sludge concentration 200mg/L, biofilm filler 25m3, calculate filler rate of vaccination about 9%, self-starting is more than 340d to stable series connection nitrosation-anaerobic ammoxidation, that is, used time is obtained, when spending two months later again Between complete integral type SNAD starting, amount to starting time about 400d, nitrogen removal rate about 70%, the pond SNAD after starting successfully DO0.3-0.8mg/L.The starting method process is cumbersome, need two pilot reactors be constantly engineering project inoculation provenance sludge and Biofilm filler, with duration and nitrogen removal rate it is low, it is big for provenance biomass demand, it is difficult to realize long-term multiple big scale of constructions of project Amplification, the pond SNAD dissolved oxygen is lower after starting successfully, it is difficult to be resistant to impact of the high DO to system.
It pays Kunming etc. and (pays Kunming, Zhang Jie, Cao Xiangsheng wait the starting of CANON technique under aerobic condition to study [J] environment Science, 2009,30 (6): 1689-1694.), using sponge as filler, have studied CANON technique directly opening under aerobic condition It is dynamic.In start-up course, temperature is controlled at 35 DEG C ± 1 DEG C, between pH 7.39-8.01.Partial nitrification is established in 60d, even When reforwarding row is to 160d, Anammox effect starts gradually to show, and when arriving 210d, TN elimination capacity reaches 1.22kgN/m3/ D, TN removal rate maintain about 70%, and CANON technique is successfully started under aerobic condition, and the starting method used time is longer, Nitrogen removal rate is lower, little for transformation period anxiety, the water outlet demanding engineering project application of total nitrogen, and sponge filler Easy to wear in actual moving process, blocking, which easily occurs, when its biofilm formation certain thickness causes mass transfer decline or filler to become It is heavy to hinder fluidisation, for engineering can stable operation there are certain risks.
(Li Huibo, Wang Yinshuan, the starting and operation of the .ANITA Mox autotrophic denitrification MBBR reactor such as fourth Juan such as Li Huibo [J] China water supply and drainage, 2014,30 (5): 1-5.) using inocalation method starting CANON process anaerobic sludge digestive juice.It connects The gross area of kind filler is than 3% starting 50m3Reactor, by 120d operation (without short distance nitration start), stationary phase It is 0.7~1.1kgN/m that total nitrogen, which removes volumetric loading,3/ d, through calculating, total nitrogen surface loading is in 1.29~2.05gN/m2/d.It should Though technology rate of vaccination is lower, the starting time is very fast, the NH of stationary phase system removal4 +The NO of-N and generation3 -The ratio between-N is 8%- 15%, and chemistry is fixed has certain gap than (11%), in general, system water inlet contains certain BOD5It will lead to denitrification phenomenon Generation cause the ratio less than normal, and there are certain nitrite oxidizing bacteria (NOB) in system, then the ratio can be made bigger than normal, It is worth noting that, the presence of NOB will with AnAOB fight for nitrite matrix make AnAOB lack suitable matrix ratio and cause be System collapse；In addition, influent ammonium concentration used in the technology is higher and water is larger causes total nitrogen elimination capacity not low, but it is discharged Ammonia nitrogen concentration still reaches 150mg/L or so, can not manage and require close to higher height, other techniques is needed to continue with.
CN108083581A discloses a kind of low energy consumption autotrophic denitrification municipal sewage system and method, uses series connection Anaerobism decarburization-autotrophic denitrification form is first inoculated with sewage treatment plant excess sludge starting anaerobism except carbon reactor, and the anaerobism being related to is de- Carbon reactor start-up course needs 60-90d, and the starting self-supported denitrification reactor process being related to later needs first whole pond inoculation 3000mg/L Anaerobic ammonium oxidation sludge carry out the starting of anaerobism early period, and artificial distribution meets anaerobic ammonia oxidizing bacteria matrix demand, the reactor Start-up course needs 90-120d, and entire technique starting needs 150-210d, and this method preposition anaerobism decarburization pond uses sludge system, long Easily there is sludge and enters back segment processing system in phase operation, impacts to entire technique, and be easy to happen sludge bulking, in addition, This method is excessive to anaerobic ammonia oxidizing bacteria strain demand, and inoculation difficulty is high and is difficult to realize the big scale of construction expansion of long-term multiple projects Increase, can artificial distribution's early period starts successful Anammox strain adapt to actual waste water that there are certain risks.
CN108585202A disclose in sequencing batch reactor realize part short distance nitration, sludge fermentation coupling denitrification with Anammox handles the technique of sanitary sewage, and the starting for the autotrophic denitrification that this method is related to: inoculation experiments room short distance nitration is detested The sponge filler of film is hung up properly in anaerobic ammonium oxidation integrated reactor, sludge concentration 2500mg/L is converted into, after mixing with blank filler Fixed that reactor is added, packing ratio 40% is intake as water distribution.This method is excessive similarly for provenance microbial biomass demand, it is difficult to Meet the starting of big scale of construction engineering project, and start-up course is that can not expect the micro- life of autotrophic denitrification function of culture with water running Can object use Practical Project water quality, and sponge filler is easy to wear in actual moving process, centainly thick to its biofilm formation Blocking influence mass transfer occurs for Du Shiyi or filler becomes heavy and hinders fluidisation.
Summary of the invention
In order to solve above-mentioned technological deficiency existing in the prior art, the invention proposes one kind to be based on the efficient autotrophy of MBBR Denitrification system and operation method control four reaction grid pond water discharging directions by communicating valve to realize that reaction tank is connected, side by side Or isolated operation, by be inoculated with, flow plus etc. means realize autotrophic denitrification technique quick start, according to processing standard requirements, can Realize different technology arrangement forms, the present invention is small with inoculative proportion, starting is fast, nitrogen removal rate small by organic substance influence The advantages that high.
To achieve the goals above, the required technical problem overcome is:
Quick spoil disposal method how is utilized within the time limit of the used time is shorter while starting nitrosation and the pure membrane process of denitrification, and And in limited provenance, inoculative proportion is reduced, the means added by stream, control aeration, stirring, different technology arrangements Form etc. realizes autotrophic denitrification system quick start, and reaches higher TN elimination capacity, reduces the occupied area of reaction unit； The unlatching such as communicating valve, inlet valve how is controlled, realizes different technology arrangement forms, thus reach different processing standards, it is real Existing system is run steadily in the long term.
One of task of the invention is to provide a kind of efficient autotrophic denitrification system based on MBBR.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of efficient autotrophic denitrification system based on MBBR comprising centerwell, reaction tank main body, reflux unit, connection Device and aerator, the reaction tank main body are four reaction tanks of two rows of two column, respectively the first reaction tank, the second reaction Pond, third reaction tank and the 4th reaction tank, wherein the first reaction tank and the 4th reaction tank for a row and are located at bottom, and first is anti- Ying Chi and the second reaction tank are a column；
The centerwell is located at the center of four diagonal lines of reaction tank comprising denitrification pond, water distribution Well and wet well, three is concentric circles pond body, and is followed successively by denitrification pond, distribution well and wet well from inside to outside；
The water inlet in the denitrification pond is connected with water inlet manifold road, treatment sewage through the water inlet manifold road into Enter the bottom in the denitrification pond, the pond body top in the denitrification pond is provided with interception sieve；Described in treatment sewage warp The interception sieve on denitrification pond pond body top enters the distribution well, is connected between the distribution well and each reaction tank, and For intaking into each reaction tank, the water distribution bottom is provided with the first mud discharging mouth；The wet well is for collecting four The water outlet of a reaction tank, and be discharged through the outlet pipeline on the wet well top, the water outlet bottom is provided with second row Mud mouth；Interception sieve is provided in the water outlet of each reaction tank；
First reaction tank and the second reaction tank, the second reaction tank and third reaction tank, third reaction tank and the 4th Pass through the first connecting line, the second connecting line, third connecting tube between reaction tank, the 4th reaction tank and the first reaction tank respectively Road and the connection of the 4th connecting line；
The communication apparatus includes communicating valve, and the communicating valve includes the first connection on the first connecting line Valve, the second communicating valve on the second connecting line, the third connecting valve on third connecting line and be located at the 4th connect Take over the 4th communicating valve of road；Upper side close to first reaction tank and the 4th reaction tank of centerwell is respectively set There are the first water inlet and the 4th water inlet, close to the side-lower difference of second reaction tank and third reaction tank of centerwell Be provided with the second water inlet and third water inlet, by first water inlet, the second water inlet, third water inlet and the 4th into The mouth of a river intakes into the first reaction tank, the second reaction tank, third reaction tank and the 4th reaction tank respectively；
Agitating device is provided with inside the denitrification pond and inside each reaction tank；
The reflux unit, including reflux pump are arranged on the return pipe of the water outlet bottom connection, described The other end of return pipe be passed through the denitrification pond；
The aerator is distributed in each reaction tank, and has been added in denitrification pond and each reaction tank outstanding Float carrier.
Advantageous effects brought by above-mentioned technical proposal are to be realized by above-mentioned communication apparatus to each reaction tank The control of water discharging direction.Three kinds of different control modes unlike the prior art can be achieved, it may be assumed that extremely by the first reaction tank of control The water discharging direction of 4th reaction tank realizes reaction tank series connection, side by side or isolated operation, and by using these three control modes, Its inoculative proportion is small and starting is fast, nitric efficiency is high, good to entering organic matter of water tolerance, and specific advantageous effects are shown in Bright book specific embodiment.
As a preferred solution of the present invention, first water inlet, the second water inlet, third water inlet and the 4th Water inlet passes through the first inlet pipeline, the second inlet pipeline, third inlet pipeline and the 4th inlet pipeline respectively and matches with described Well connection, and it is provided with the first inlet valve on first inlet pipeline, the second inlet valve is set on the second inlet pipeline, Third inlet valve is set on third inlet pipeline, the 4th inlet valve is set on the 4th inlet pipeline；The interception sieve includes First, which intercepts sieve, the second interception sieve, third, intercepts sieve and the 4th interception sieve, and described first intercepts sieve, second Intercept sieve, third intercept sieve, the 4th interception sieve be located at the first reaction tank, the second reaction tank, third reaction tank and In 4th reaction tank.
As another preferred embodiment of the invention, the aerator in each reaction tank is by multiple groups boring aeration pipe It is formed with micropore aeration pipe.
Further, the first reaction tank, the second reaction tank, third reaction tank, the 4th reaction tank water outlet pass through respectively First outlet pipeline, the second outlet pipeline, third outlet pipeline and the 4th outlet pipeline are connect with the wet well, and One outlet pipeline, the second outlet pipeline, third outlet pipeline and the 4th outlet pipeline are correspondingly arranged on the first outlet valve, second go out Water valve, third outlet valve and the 4th outlet valve.
Another task of the invention is to provide the operation method of the above-mentioned efficient autotrophic denitrification system based on MBBR, wrap Include following three kinds of control models:
The first, parallel running mode:
First reaction tank, the second reaction tank, third reaction tank and the 4th reaction tank is coordination, each reaction Pond independently intakes, is independently discharged, and makes water outlet be pooled to wet well by control related valve and be discharged through outlet pipeline；
The second, bi serie A operational mode:
First reaction tank, the second reaction tank are one group, and the third reaction tank and the 4th reaction tank are one group, Treatment sewage passes through denitrification pond, and the interception sieve through denitrification pond pond body top enters distribution well, respectively by first into The mouth of a river, the 4th water inlet continuously enter the first reaction tank, the 4th reaction tank, are made in the first reaction tank by controlling related valve Water enter the second reaction tank and so that the water in the 4th reaction tank enters third reaction tank be finally pooled to wet well, through being discharged Pipeline discharge；
Third, bi serie B operational mode:
First reaction tank, the second reaction tank, third reaction tank are one group, and the 4th reaction tank is one group, Treatment sewage passes through denitrification pond, and the interception sieve through denitrification pond pond body top enters distribution well, respectively by first into The mouth of a river, the 4th water inlet continuously enter the first reaction tank, the 4th reaction tank, and make the first reaction tank by controlling related valve Interior water sequentially enters the second reaction tank, third reaction tank, and finally water outlet is pooled to wet well, is discharged through outlet pipeline.
Preferably, the parallel running mode specific steps are as follows: treatment sewage by denitrification pond water inlet into Enter denitrification pond, after the interception sieve on denitrification pond pond body top enters distribution well respectively by the first inlet valve, second into Water valve, third inlet valve, the 4th inlet valve and the first water inlet, the second water inlet, third water inlet and the 4th water inlet are continuous Into each reaction tank, water outlet intercepts sieve, the second interception sieve, third by first respectively and intercepts sieve and the 4th and intercept sieve Then net is discharged into wet well by respective outlet valve, is finally discharged by outlet pipeline.
Preferably, the bi serie A operational mode specific steps are as follows: treatment sewage passes through the water inlet in denitrification pond Into denitrification pond, through denitrification pond pond body top intercept after sieve enters distribution well respectively by the first inlet valve, the 4th into Water valve and the first water inlet, the 4th water inlet continuously enter the first reaction tank, the 4th reaction tank, and the water outlet of the first reaction tank passes through the One, which intercepts sieve, the first communicating valve, the second interception sieve, enters the second reaction tank, intercepts sieve through second, the second outlet valve converges Enter wet well to be discharged through outlet pipeline；The water outlet of 4th reaction tank intercepts sieve, third connecting valve, third by the 4th and intercepts sieve Into third reaction tank, the water outlet of third reaction tank imports wet well after intercepting sieve, third outlet valve by third, through outlet pipe Road water outlet.
Preferably, above-mentioned bi serie B operational mode specific steps are as follows: bi serie B operational mode specific steps are as follows: wait locate Reason sewage enters denitrification pond by the water inlet in denitrification pond, after through denitrification pond pond body top, interception sieve enters distribution well The first reaction tank, the 4th are continuously entered instead by the first inlet valve, the 4th inlet valve and the first water inlet, the 4th water inlet respectively Ying Chi, the water outlet of the first reaction tank intercept sieve, the first communicating valve, the second interception sieve by first and enter the second reaction tank, the The water outlet of two reaction tanks intercepts sieve and enters third reaction tank, third reaction tank by the second interception sieve, the second communicating valve, third Water outlet intercepts sieve by third, third outlet valve is pooled to after wet well and is discharged by outlet pipeline；The water outlet of 4th reaction tank is logical The 4th interception sieve, the 4th outlet valve remittance wet well are crossed, is discharged through outlet pipeline.
Compared with prior art, present invention offers following advantageous effects:
1) the starting time is short, it is only necessary to can start success within 110 days；
2) autotrophic denitrification inoculative proportion is small, and inoculative proportion is no more than 5%；
3) starting scale is big, is suitable for big scale of construction project scale and starts；
4) stable, meet engineering and requires；
5) operational mode is flexible, controls four reaction tank water discharging directions by communicating valve according to Effluent criteria and realizes reaction tank Between series connection, side by side or isolated operation realize stable operation；
6) load is high, and land occupation saves, and volumetric loading can reach 1.3kgN/m3/d；
7) denitrification pond uses MBBR form, by regular water distribution bottom spoil disposal, the denitrification to fall off can be prevented biological Film enters autotrophic denitrification reaction tank, brings adverse effect to autotrophic denitrification functional microorganism.
8) operation control is simple, and autotrophic denitrification reaction tank uses MBBR form, highly enriched efficient bacterium on carrier, processing Load is high.
9) Prepositive denitrification, which is added, can reduce influent COD to the adverse effect of autotrophic denitrification functional microorganism, take off for autotrophy Nitrogen reaction tank is created a favorable environment, and can promote nitrogen removal rate to a certain extent, and denitrification pond can be reacted with autotrophic denitrification Pond supplements certain basicity, strengthens nitrification effect.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawing:
Fig. 1 is that the present invention is based on the plan views of the efficient autotrophic denitrification system of MBBR；
Fig. 2 is that the present invention is based on the left views of the efficient autotrophic denitrification system of MBBR；
In figure, 1, water inlet manifold road；2, denitrification pond；3, distribution well；4, wet well；5, outlet pipe；6, reaction tank stirs Device；7, denitrification pond agitating device；8, denitrification pond intercepts sieve；C1-C4, reaction tank (the first reaction tank-the four reaction Pond)；S1-S4, reaction tank intercept sieve (first, which intercepts sieve-the four, intercepts sieve)；I1-I4, inlet valve (the first inlet valve- 4th inlet valve)；E1-E4, outlet valve (first the-the four outlet valve of outlet valve)；H, reflux pump；(first connects for M1-M4, communicating valve Four communicating valve of port valve-the).
Specific embodiment
The invention proposes a kind of efficient autotrophic denitrification system and operation method based on MBBR, it is of the invention excellent in order to make Point, technical solution are clearer, clear, elaborate combined with specific embodiments below to the present invention.
Firstly, being explained as follows to relevant technical terms involved in the present invention:
1) suspending carrier, specific gravity are filled out in 0.93-0.97, voidage > 90%, also referred to as floating stuffing, abbreviation carrier Material；
2) effective ratio area: since carrier outer surface phase mutual friction microorganism is difficult to adhere to, effective ratio area It is often referred to internal surface area, i.e. effective surface area possessed by the carrier of unit volume.Effective ratio area=effective surface area ÷ Volume, unit m2/m3；
3) specific gravity: the density ratio that support density and room temperature are lauched；
4) voidage: between carrier and carrier and the volume of carrier intermediate gaps and carrier stack the ratio between volume；
5) fluidize: filler flows with water flow sufficiently connect with water quality pollutant in a liquid under the active force for being aerated or stirring The state of touching, suspending carrier do not generate accumulation, can flow freely in pond with water flow；
6) filling rate: suspending carrier filling rate, the i.e. ratio of the volume of suspending carrier and filling region pool capacity, suspending carrier Volume be natural packing under total volume；Such as 100m3Suspending carrier, filling to 400m3Pool capacity, filling rate 25%；
7) surface loading: the pollutant quality that unit packing specific area removes daily, gN/m2/d；
8) ammoxidation surface loading: unit packing specific area aoxidizes the quality of ammonia nitrogen, gN/m daily2/d；If intaking ammonia Nitrogen 400mg/L is discharged ammonia nitrogen 200mg/L, flow of inlet water 5m3/ d, biomembrane area 1000m2, then ammoxidation surface loading be (500-200) × 5/1000=1.5gN/m2/d；
9) TN removes surface loading: the total nitrogen quality that unit filler effective ratio area removes daily, gN/m2/d；If into Water TN 500mg/L is discharged TN 100mg/L, flow of inlet water 10m3/ d, biomembrane area 2000m2, then it is negative to remove surface by TN Lotus is (500-100) × 10/2000=2gN/m2/d；
10) autotrophic denitrification: the technique is the general designation of nitrosation and Anammox (ANAMMOX), to reach denitrogenation Purpose；Under aerobic condition, ammonia oxidation bacteria (AOB) is by ammonia nitrogen partial oxidation at nitrous acid, the nitrous acid and some residual of generation Ammonia nitrogen anaerobic ammonia oxidizing bacteria (AnAOB) effect issue anaerobic ammonium oxidation of beginning to detest (ANAMMOX) reaction generate nitrogen；
11) CANON technique realizes autotrophic denitrification in single-reactor；In CANON, AOB and AnAOB are same Reactor coexists；AOB is located at the outer layer of carrier, makees electron acceptor with oxygen, is sub- nitrogen by ammonium oxidation；AnAOB is located at carrier Internal layer, using sub- nitrogen as electron acceptor with remaining ammonia nitrogen cotransformation as nitrogen；
12) CANON suspending carrier: the suspending carrier of i.e. existing CANON effect, AOB and AnAOB divide in a manner of biomembrane Layer exists；
13) nitrosation: microorganism is by ammonia nitrogen (NH4 +) it is oxidized to nitrite nitrogen (NO2 -), without being further oxidized to Nitrate nitrogen (NO3 -) process, i.e., enriching ammonia oxidation bacteria (AOB) in system, and eliminate nitrite oxidizing bacteria (NOB)；
14) MBBR: moving bed biofilm reactor MBBR (Moving Bed Biofilm Reactor) this method passes through A certain number of suspending carriers are added into reactor, biomass and biological species in reactor are improved, to improve reaction The treatment effeciency of device；
15) aeration intensity: the aeration quantity of unit area, unit m3/m2/ h, including micro-pore aeration and boring aeration two / and；If micro-pore aeration amount is 10m3/ h, boring aeration amount are 5m3/ h, the floor space of reactor are 5m2, aeration intensity is (10+5)/5=3m3/m2/h；
16) ratio that the water that biological section is continued with accounts for total Water, % reflux ratio: are back to；
17) total ammonia oxidation rate: the total amount of ammonia that water inlet aoxidizes after multi-stage aerobic reaction tank accounts for ammonia nitrogen amount in total water inlet Ratio, %；If influent ammonia nitrogen 400mg/L, ammonia nitrogen 100mg/L is discharged after two-stage aerobic reaction tank, then total ammonia oxidation rate For (400-100)/400=75%；For single-stage reactor, generally directly it is referred to as ammonia oxidation rate；For multistage reactor, ammonia Oxygenation efficiency refers to ammonium oxidation situation at different levels, if the multistage whole performance of analysis, uses total ammonia oxidation rate；
18) TN removal rate: the removal amount of total nitrogen accounts for the ratio into water total nitrogen；
19) ordinary activated sludge: i.e. sewage plant biochemistry pool activated sludge is inoculated with the mainly preliminary acquisition AOB bacterium of the sludge Kind, accelerate biofilm；
20) C/N: carbon-nitrogen ratio of intaking, BOD in fingering water5With the ratio of kjeldahl nitrogen (organic nitrogen+ammonia nitrogen)；
21) it pre-processes: if the excessive unsuitable autotrophic denitrification related process processing of water inlet C/N, needs to carry out pretreatment reduction Content of organics, until meeting autotrophic denitrification water quality requirement；
22) agitator power: the i.e. power number of unit basin's effective volume, W/m3；Activated sludge process is usually 3-5W/m3；MBBR In, power of agitator is related to filling rate, and filling rate is higher, and power of agitator is bigger.
Following first reaction tanks, the second reaction tank, third reaction tank, the 4th reaction tank abbreviation C1, C2, C3, C4, first into Water valve, the second inlet valve, third inlet valve, the 4th inlet valve abbreviation I1, I2, I3, I4, the first communicating valve, the second communicating valve, Tee joint valve, the 4th communicating valve abbreviation M1, M2, M3, M4, the first outlet valve, the second outlet valve, third outlet valve, the 4th water outlet Valve abbreviation E1, E2, E3, E4, first intercept sieve, second intercept sieve, third intercepts sieve, the 4th intercept sieve abbreviation S1, S2、S3、S4。
The present invention, a kind of efficient autotrophic denitrification system based on MBBR, referring to figs. 1 and 2, including denitrification pond 2, Distribution well 3, reaction tank main body C1-C4, wet well 4, denitrification pond agitating device 7, reaction tank agitating device 6, communication apparatus, are returned Stream pump H, reaction tank main body are two rows of two column, four reaction tanks, respectively the first reaction tank, the second reaction tank, third reaction tank and 4th reaction tank, wherein the first reaction tank and the 4th reaction tank are a row and are located at bottom, the first reaction tank and the second reaction tank It for a column, is equivalent to the first reaction tank and is located at lower left, be respectively then the second reaction tank, third reaction according to clockwise direction Pond and the 4th reaction tank, technique center are concentric circles centerwell, set gradually denitrification pond, distribution well, wet well from inside to outside.
The upper side (close to wet well end) of first reaction tank and the 4th reaction tank is respectively arranged with the first water inlet and the Four water inlets are intake thereto by I1 and I4, the side-lower of the second reaction tank and third reaction tank be respectively arranged with second into The mouth of a river and third water inlet, are intake thereto by I2 and I3, the first water outlet, the second water outlet, third water outlet and the 4th Water outlet is respectively arranged with the first interception sieve S1, the second interception sieve S2, third and intercepts sieve S3 and the 4th and intercept sieve S4, it is diagonally disposed that the first interception sieve, the second interception sieve, third, which intercept sieve and the 4th interception sieve,；Above-mentioned One water inlet, the second water inlet, third water inlet and the 4th water inlet pass through respectively the first inlet pipeline, the second inlet pipeline, Third inlet pipeline and the 4th inlet pipeline are connect with above-mentioned distribution well, and are provided with first on above-mentioned first inlet pipeline The second inlet valve I2 is arranged on the second inlet pipeline by inlet valve I1, is arranged third inlet valve I3 on third inlet pipeline, the 4th into 4th inlet valve I4 is set in water lines；Denitrification pond is provided with water inlet manifold road 1, denitrification pond and intercepts sieve 8, denitrification pond Agitating device 7 is intake by water inlet manifold road 1；Treatment sewage enters the bottom in denitrification pond through water inlet manifold road, and sewage is through institute The interception sieve for stating denitrification pond top enters distribution well.First reaction tank, the second reaction tank, third reaction tank, the 4th reaction The water outlet in pond passes through the first outlet pipeline, the second outlet pipeline, third outlet pipeline and the 4th outlet pipeline and water outlet respectively Well connection, and first is correspondingly arranged in the first outlet pipeline, the second outlet pipeline, third outlet pipeline and the 4th outlet pipeline Outlet valve E1, the second outlet valve E2, third outlet valve E3 and the 4th outlet valve E4.
Four reaction tanks of piping connection are arranged in distribution well, set inlet valve I1, I2, I3, I4 on pipeline；Pipeline is arranged in wet well Four reaction tanks are connected, four reaction tank water outlets are collected by inlet pipeline and outlet valve E1, E2, E3, E4, are gone out through pond body top Water pipe 5 is discharged, and the bottom of distribution well is provided with the first mud discharging mouth for spoil disposal, is provided in the bottom of wet well for arranging Second mud discharging mouth of mud；
An agitating device is respectively provided in each reaction tank, the specific structure and the method for operation of agitating device are used for reference existing Technology can be realized, as frequency conversion blender can be selected in agitating device.
Reflux pump is arranged in water outlet bottom in above-mentioned reflux pump, return pipe is passed through denitrification pond；
Above-mentioned communicating valve is connected that is, between reactor by communicating valve, including the first communicating valve, the second communicating valve, the Tee joint valve, the 4th communicating valve；Wherein, connecting line of first communicating valve between the first reaction tank and the second reaction tank On, for the second communicating valve on the connecting line between the second reaction tank and third reaction tank, it is anti-that third connecting valve is located at third On connecting line between Ying Chi and the 4th reaction tank, the 4th communicating valve is between the one or four reaction tank and the first reaction tank On connecting line；
Aerator is distributed in denitrification pond and each reaction tank, by multiple groups boring aeration pipe and micropore aerating pipe group At, and suspending carrier has been added in denitrification pond and each reaction tank.
The second, main explanation is done to operational process of the invention below with reference to above system.
Operational process has following 3 kinds of control models:
1) parallel running mode: treatment sewage pass through denitrification pond 2, by denitrification pond pond body top intercept sieve 8 into Enter distribution well, continuously enters each reaction tank C1- by inlet valve I1-I4, first to fourth interception sieve S1-S4 by distribution well Then C4, water outlet are finally discharged by outlet pipe 5 by outlet valve E1-E4 to sump 4 respectively by intercepting sieve S1-S4； Four ponds are parallel relationships, and independent operating is discharged the final sump 4 for being aggregated into center and is discharged through outlet pipe 5, passes through valve in the process Door control；Valve is not described to be in off state；
2) bi serie A operational mode: treatment sewage passes through denitrification pond 2, intercepts sieve 8 by denitrification pond pond body top Into distribution well, passes through inlet valve I1, I4 respectively by distribution well and continuously enter reaction tank C1, C4；C1 water outlet is intercepted by first Sieve S1, communicating valve M1, the second interception sieve S2 enter reaction tank C2, C2 water outlet by second intercept sieve S2, outlet valve E2, It is discharged after sump 4 by outlet pipe 5；C4 water outlet is entered anti-by the 4th interception sieve S4, communicating valve M3, third interception sieve S3 Pond C3 is answered, C3 water outlet after third interception sieve S3, outlet valve E3, sump 4 by outlet pipe 5 by being discharged；Bi serie mode A, I.e. two groups in parallel, and every group of two lattice are connected respectively, i.e. C1-C2, C4-C3, and water outlet is finally aggregated into the sump 4 at center through outlet pipe 5 water outlets；
3) bi serie B operational mode: treatment sewage passes through denitrification pond 2, intercepts sieve 8 by denitrification pond pond body top Into distribution well, pass through inlet valve I1, I4 respectively by distribution well, interception sieve S1, S4 continuously enter reaction tank C1, C4；C1 goes out Water enters reaction tank C2 by the first interception sieve S1, communicating valve M1, the second interception sieve S2, and C2 water outlet intercepts sieve by second Net S2, communicating valve M2, third intercept sieve S3 and enter C3, and C3 water outlet intercepts sieve S3, outlet valve E3, sump 4 by third It is discharged afterwards by outlet pipe 5；C4 water outlet after the 4th interception sieve S4, outlet valve E4, sump 4 by outlet pipe 5 by being discharged；Double systems Column B-mode, i.e., two groups in parallel: one group of three lattice series connection, one group of single lattice, i.e. C1-C2-C3, C4, water outlet are finally aggregated into the collection at center Well 4 is discharged through outlet pipe 5.
Why different operational modes is set, the main function need for considering to meet different reactor, different operation phase It asks.
Third, starting method of the present invention, comprising the following steps:
1) starting prepares, and suspending carrier, filling rate 20%-67% are added in each reaction tank and denitrification pond；Instead Ying Chi and denitrification pond are inoculated with ordinary activated sludge, and sludge concentration is 3-5g/L after inoculation；
2) nitrosation and denitrification starting, using parallel running mode, each reaction tank is independently intake, is independently discharged, and Water outlet is made to collect wet well by controlling related valve, wet well part effluent recycling to denitrification pond, remaining water outlet is through going out Water lines discharge；The daily short time opens water outlet bottom second row mud mouth and carries out spoil disposal, is lost sludge gradually, daily sludge Concentration, which reduces, is no more than 20%, until sludge concentration < 1.0g/L in reaction tank and denitrification pond, controls reaction tank DO in 3-6mg/ L, aeration intensity > 5m3/m2/ h, operation is until denitrification pond BOD5Removal rate > 50%, and each reaction tank ammoxidation surface loading > 1.5gN/m2/ d, into next step；
3) autotrophic denitrification pretrigger, using bi serie A operational mode, continuum micromeehanics make to obtain by controlling related valve Water collects wet well, wet well part effluent recycling to denitrification pond, remaining water outlet is discharged through outlet pipeline, reaction tank C4, anti- Answer pond C3 control DO in 3-6mg/L, aeration intensity > 5m3/m2/ h, C4 and the total ammonia oxidation rate > 50% of C3；Reaction tank C1, reaction tank Speed of agitator 30-45r/min is controlled in C2, controls DO in 1-2mg/L, aeration intensity > 3m3/m2/ h, C1 and the total ammonia oxidation rate of C2 > 50%；Operation is until reaction tank C1 ammoxidation surface loading > 1.0gN/m2/ d enters in next step；
4) autotrophic denitrification inoculation starting collects water outlet out by controlling related valve using bi serie A operational mode Well, wet well part effluent recycling to denitrification pond, remaining water outlet are discharged through outlet pipeline, reaction tank C4, reaction tank C3 control DO processed is in 3-6mg/L, aeration intensity > 5m3/m2/ h, C4 and the total ammonia oxidation rate > 50% of C3；Reaction tank C2 controls speed of agitator 15- 30r/min, DO are in 1-2mg/L, aeration intensity > 3m3/m2/h；Total ammonia oxidation rate > 50% of C1 and C2；It is inoculated with to reaction tank C1 CANON suspending carrier, rate of vaccination 3-5%, continuum micromeehanics；Reaction tank C1 controls speed of agitator 15-30r/min, and DO is in 0.5- 1.5mg/L, aeration intensity > 2m3/m2/h；Operation is until the TN of reaction tank C1 removes surface loading > 0.8gN/m2/ d enters next Step；
5) autotrophic denitrification stream adds starting, using bi serie B operational mode, continuum micromeehanics；Made by controlling related valve Water outlet collects wet well, wet well part effluent recycling to denitrification pond, and residue water outlet is discharged through outlet pipe；C4 controls DO in 3- 6mg/L, aeration intensity > 5m3/m2/ h, ammonia oxidation rate > 50%；C1 controls speed of agitator 15-30r/min, and DO is in 1.5-3.5mg/ L, aeration intensity > 5m3/m2/ h, C2 control speed of agitator 30-45r/min, and DO is in 0.5-1.5mg/L, aeration intensity > 1.5m3/ m2/h；C3 controls speed of agitator 30-45r/min, and DO is in 1-2mg/L, aeration intensity > 3m3/m2/h；Operation is up to reaction tank C2's TN removes surface loading > 1.6gN/m2/ d enters in next step；
6) autotrophic denitrification expands starting, using bi serie A operational mode, by controlling related valve water outlet is collected out Well, wet well part effluent recycling to denitrification pond, residue water outlet are discharged through outlet pipe；By in C4 and C3 reaction tank with C1 and The floating stuffing of difference 50% in C2 reaction tank is replaced, and each reaction tank controls agitating device revolving speed 15-30r/min, and DO exists 2.3-2.5mg/L aeration intensity 3.5m3/m2/ h, operation is until the TN of each reaction tank removes surface loading > 1.6gN/m2/ d, into Enter in next step；
7) autotrophic denitrification stable operation, continuum micromeehanics；When TN removal rate requires < 80%, using parallel running mode, lead to Crossing control related valve makes water outlet collect wet well, and wet well part effluent recycling to denitrification pond, residue water outlet is through being discharged Pipe discharge；Each reaction tank controls speed of agitator 30-45r/min, and DO is in 2.0-5.0mg/L, aeration intensity > 5m3/m2/ h is each anti- Pond water outlet ammonia nitrogen is answered to remove surface loading > 2.5gN/m in 60-100mg/L, the TN of each reaction tank2/d；When TN removal rate require >= When 80%, using bi serie A operational mode, water outlet is made to collect wet well, the water outlet of wet well part by controlling related valve It is back to denitrification pond, residue water outlet is discharged through outlet pipe；Reaction tank C2 or reaction tank C3 water outlet ammonia nitrogen is in 30-50mg/L, instead Pond C1 and reaction tank C4 is answered to control speed of agitator 30-45r/min, DO is in 2.0-5.0mg/L, aeration intensity > 6m3/m2/ h, TN Removal rate > 50%；Reaction tank C2 and reaction tank C3 controls speed of agitator 15-30r/min, and for DO in 1.5-2.5mg/L, aeration is strong Degree > 3m3/m2/h；It periodically turns on water distribution bottom first row mud mouth and carries out spoil disposal, each reaction tank and denitrification pond sludge concentration < 1g/L。
In above-mentioned steps, when intake C/N < 1 when, the control of wet well reflux ratio is in 150%-200%, as 1≤C/N of intaking < 1.5, the control of wet well reflux ratio in 200%-250%, when intake 1.5≤C/N < 2 when, wet well reflux ratio, which controls, to exist It is 30-50r/min, the agitator power of each reaction tank and denitrification pond that 250-300% denitrification pond, which controls speed of agitator, For 15-50w/m3Type selecting.
4th, it remarks additionally:
1) it why using MBBR form realization one-part form autotrophic denitrification, essentially consists in using two stage process, control is multiple It is miscellaneous, it needs to control nitrosation water outlet proportion, meets the requirement of ANAMMOX technique；Using granule sludge mode, AnAOB is not easy to be enriched with, Activated sludge process is easy to be lost, it is difficult to starting or granulating；For microorganism, attached state and suspended state show entirely different The correlation technique of activated sludge process can not be directly used in biofilm by property feature, be needed for autotrophic denitrification and MBBR two The characteristics of a technique, specific aim control；
2) each stage DO control requires different, and main cause provides aerobic or detests by control DO for autotrophic denitrification biomembrane Oxygen environment guarantees AOB and AnAOB living environment, and with the thickness change and maturing course of biomembrane, adjusts DO level, full Sufficient biomembrane layering requires；Biomembrane is more mature, and biofilm thickness is opposite to be increased, stronger for the tolerance of DO, needs more High DO is horizontal；Meanwhile the opposite increase of biofilm thickness, it is also desirable to which higher shearing controls biofilm thickness, prevents biomembrane It is blocked up；Therefore DO and aeration intensity two indices is required to be controlled simultaneously；The autotrophic denitrification technique of MBBR form, due to having belonged to Full biofilm system, with traditional activated sludge process in control method, feature very different；For activated sludge process, autotrophic denitrification The general DO of technique is no more than 1mg/L；
3) each stage running mode is different, main to consider vaccination ways and the method for operation, biofilm detachment, although belonging to old Change process falls off naturally, but still has more active bacteria, can be inoculated with for subsequent reactor, accelerates start-up course, therefore uses a variety of Operational mode is gradually inoculated with；
4) when the control of autotrophic denitrification reaction tank speed of agitator is to be aerated deficiency, auxiliary suspending carrier fluidisation, and it is anti- It only shears too small biomembrane to thicken, or the excessive biofilm detachment of shearing；
5) scope of application, the present invention are suitble to high ammonia nitrogen, C/N < 2, and hot waste water is especially suitable for anaerobic sludge and digests supernatant The processing of liquid, landfill leachate etc.；
6) be directed to different water inlet C/N, need to be arranged different reflux ratios, main cause be with the increase of water inlet C/N, Influence of the COD to autotrophic denitrification system in water inlet can be eliminated with intensified anti-nitrated process by raising reflux ratio, while improve denitrogenation effect Rate.
For known to industry professional, when intake C/N >=2 when, increase pretreatment and meet the requirements.
When inlet water temperature is not at 25-35 DEG C, to increase heat-exchange system known to industry professional.
For known to industry professional, above-mentioned suspending carrier, i.e., specific gravity is more smaller than water before biofilm, usually 0.93- 0.97, specific gravity and water are close after biofilm, realize suspension effect, generally high density polyethylene (HDPE) material etc..
Installation is needed to prevent short stream device between connecting line known to industry professional, to come together in single reaction tank, Such as partition, training wall prevent from mixing into water uneven.
The present invention will be further described combined with specific embodiments below.
Embodiment 1:
It is dehydrated liquid as system using certain municipal sewage plant's anaerobically digested sludge to intake, water 2500m3/ d, pH mean value 7.9,32 DEG C of water temperature mean value, inlet COD concentration mean value 1131mg/L, BOD5Concentration mean value 952mg/L, ammonia nitrogen concentration mean value 550mg/L, sub- nitrogen nitrate nitrogen concentration mean value 2.0mg/L, basicity mean value is (with CaCO3Meter) 3795mg/L, the total dischargeable capacity of reaction tank 800m3, denitrification pond dischargeable capacity 400m3, intake and enter four reaction tank C1-C4 through denitrification pond.
Starting prepares, and suspending carrier, carrier effective ratio area are added in each reaction tank and denitrification pond 800m2/m3, voidage 90% meets " water process high density polyethylene (HDPE) suspending carrier " (CJ/T461-2014) professional standard, Filling rate 50%；Reaction tank is inoculated with ordinary activated sludge, and sludge concentration is 3.9g/L in each reaction tank；
Nitrosation and denitrification starting, using parallel running mode, each reaction tank controls DO in 4.0- by aerator 4.6mg/L, aeration intensity 5.2m3/m2/ h makes water outlet collect wet well by opening outlet valve E1-E4, and wet well part goes out Water is back to denitrification pond, carries out the inoculation of denitrification pond, and residue water outlet is discharged through outlet pipeline, and the daily short time opens after running 6d It opens water outlet bottom mud discharging mouth and carries out spoil disposal, be lost sludge gradually, daily sludge concentration, which reduces, is no more than 20%, operation to the 14d reaction tank and denitrification pond sludge concentration are down to 0.8g/L or so.It runs to 27d reaction tank C1-C4 and is discharged ammonia nitrogen concentration Mean value 239.3mg/L, reaction tank ammonia oxidation rate 56%, ammoxidation surface loading 2.03gN/m2/ d, denitrification pond BOD5Removal rate 90%, into next step.
Autotrophic denitrification pretrigger, using bi serie A operational mode, reaction tank C4, C3 control DO in 4.0mg/L, and aeration is strong Spend 5m3/m2The total ammonia oxidation rate of/h, C4, C3 is up to 62%；Speed of agitator 30r/min in reaction tank C1, C2, DO is in 1.5mg/L for control, Aeration intensity 3m3/m2/ h makes water outlet collect wet well, wet well part effluent recycling to anti-nitre by Open valve E2, E3 Change pond, residue water outlet is discharged through outlet pipeline, and after running 15d, the total ammonia oxidation rate of C1, C2 is up to 51%, C1 ammoxidation surface loading For 1.92gN/m2/ d, denitrification pond BOD5Removal rate 85%, into next step；
Autotrophic denitrification inoculation starting is inoculated with CANON suspending carrier, inoculation to reaction tank C1 using bi serie A operational mode Rate is 4%, controls speed of agitator 30r/min, DO is in 0.8mg/L, aeration intensity 2.1m3/m2/h；Reaction tank C1 is discharged through being connected to Valve M1 enters reaction tank C2, and C2 controls speed of agitator 20r/min, and DO is in 2mg/L, aeration intensity 3m3/m2/ h, C4, C3 control DO In 4mg/L, aeration intensity 5m3/m2/ h makes water outlet collect wet well by Open valve E2, E3, and wet well part is discharged back Flow to denitrification pond, residue water outlet is discharged through outlet pipeline, operation 31d to the total ammonia oxidation rate of C4, C3 up to 72%, reaction tank C1's TN removes surface loading and reaches 1.74gN/m2/ d, denitrification pond BOD5Removal rate 85%, into next step；
Autotrophic denitrification stream adds starting, and using bi serie B operational mode, reaction tank C4 controls DO in 3.5-4mg/L, and aeration is strong Spend 5.5m3/m2/ h, ammonia oxidation rate is up to 52%, and reaction tank C1 controls speed of agitator 30r/min, and DO is in 2-2.5mg/L, aeration intensity 5m3/m2/h；Reaction tank C2 controls speed of agitator 35r/min, and DO is in 1.0-1.3mg/L, aeration intensity 2.5m3/m2/ h, reaction tank C3 controls speed of agitator 45r/min, and DO is in 1.3-1.5mg/L, aeration intensity 3m3/m2/h；Make to obtain by Open valve E3, E4 Water collects wet well, wet well part effluent recycling to denitrification pond, and residue water outlet is discharged through outlet pipeline, and operation 27d is to anti- The TN of pond C2 is answered to remove surface loading 1.79gN/m2/ d, denitrification pond BOD5Removal rate 80%, into next step；
Autotrophic denitrification expands starting, using bi serie A operational mode, continuum micromeehanics；By in C4 and C3 reaction tank with C1 and The suspending carrier of difference 50% in C2 reaction tank is replaced；Each reaction tank controls speed of agitator 30r/min, and DO is in 1.5-2mg/ L, aeration intensity 3m3/m2/h；Water outlet is made to collect wet well by Open valve E2, E3, wet well part effluent recycling is to anti- Nitrification tank, residue water outlet are discharged through outlet pipe, and the TN of operation 27d to each reaction tank removes surface loading 2.2gN/m2/ d, anti-nitre Change pond BOD5Removal rate 60%, into next step；
Autotrophic denitrification system stable operation, using bi serie A operational mode, reaction tank C1 and reaction tank C4 control DO and exist 3mg/L, aeration intensity 5.6m3/m2/ h, ammonia oxidation rate are greater than 47%；Reaction tank C2 and reaction tank C3 controls DO in 2mg/L, exposes Gas intensity 3m3/m2/ h makes water outlet collect wet well, wet well part effluent recycling to denitrification by Open valve E2, E3 Pond, residue water outlet are discharged through outlet pipeline, and autotrophic denitrification filled film load reaches 3.67gN/m2/ d, corresponding volumetric loading reach 1.46kgN/m3/ d, denitrification pond BOD5Removal rate 70%, it is 2.3gN/m that denitrification pond TN, which removes surface loading,2/ d, every 10d It opens water distribution bottom first row mud mouth and carries out spoil disposal.
In above-mentioned steps, wet well reflux ratio is controlled always 300%, and denitrification pond controls speed of agitator 45r/min, most Whole stable operation stage whole system nitrogen removal rate reaches 92%, and wherein the nitrogen removal rate of denitrification pond contribution is 24%.
Embodiment 2:
Using certain garbage loading embeading factory landfill leachate anaerobic effluent as water inlet, water 1300m3/ d, pH value 7.8- 8.3,33 DEG C of water temperature mean value, inlet COD concentration mean value 920mg/L, BOD5Concentration mean value is 801mg/L, average ammonia nitrogen concentration 550mg/L, the total dischargeable capacity 400m of reaction tank3, four reaction tanks are equally divided into, each reaction tank dischargeable capacity is 100m3, instead Nitrification tank effective volume 200m3, intake and respectively enter four reaction tank C1-C4 behind denitrification pond.
Starting prepares, and adds suspending carrier, carrier effective ratio area 800m in reaction tank and denitrification pond2/m3, empty Gap rate 90% meets " water process high density polyethylene (HDPE) suspending carrier " (CJ/T461-2014) professional standard, filling rate 50%； It is inoculated with aerobic sludge, sludge concentration is 4.7g/L or so in each reaction tank；
Nitrosation and denitrification starting control each reaction tank DO in 3.0-4.0mg/L, aeration using parallel running mode Intensity 5.3m3/m2/ h makes water outlet collect wet well, wet well part effluent recycling to anti-nitre by opening outlet valve E1-E4 Change pond, residue water outlet is discharged through outlet pipe, and the short time opens water outlet bottom mud discharging mouth and carries out spoil disposal daily after operation 7d, makes dirt Mud is gradually lost, and daily sludge concentration, which reduces, is no more than 20%, and operation to 14d reaction tank and denitrification pond sludge concentration is down to 0.9g/L or so, operation to 27d ammonia oxidation rate reach 57%, and ammoxidation surface loading is 2.54gN/m2/ d, denitrification pond BOD5Removal rate 80%, into next step；
Autotrophic denitrification pretrigger, using bi serie A operational mode, reaction tank C4, C3 control DO in 4mg/L, aeration intensity 5m3/m2The total ammonia oxidation rate of/h, C4, C3 is up to 90%；Speed of agitator 30r/min in reaction tank C1, C2, control DO are exposed in 1.7mg/L Gas intensity 3.5m3/m2/ h makes water outlet collect wet well, wet well part effluent recycling to anti-nitre by Open valve E2, E3 Change pond, residue water outlet is discharged through outlet pipeline, and after running 15d, the total ammonia oxidation rate of C1, C2 is up to 85%, C1 ammoxidation surface loading For 1.87gN/m2/ d, denitrification pond BOD5Removal rate 90%, into next step；
Autotrophic denitrification inoculation starting is inoculated with CANON suspending carrier to C1, rate of vaccination is using bi serie A operational mode 4%, speed of agitator 20r/min is controlled, DO is in 0.5-1.0mg/L, aeration intensity 2.5m3/m2/h.Reaction tank C1 is discharged through being connected to Valve M1 enters reaction tank C2, and C2 controls speed of agitator 20r/min, and DO is in 1-2mg/L, aeration intensity 3.5m3/m2/h.C3, C4 control DO processed is in 3-3.5mg/L, aeration intensity 5.1m3/m2/h.Speed of agitator 45r/min in denitrification pond, passes through Open valve E2, E3 So that water outlet collects wet well, wet well part effluent recycling to denitrification pond, residue water outlet is discharged through outlet pipeline；Operation 31 It, the TN removal surface loading that the total ammonia oxidation rate of C3, C4 is maintained at 93% or more, C1 is more than 0.91gN/m2/ d, denitrification pond BOD5Removal rate 80%, into next step；
Autotrophic denitrification stream adds starting, and using bi serie B operational mode, C4 controls DO in 3.5-4.0mg/L, aeration intensity 6m3/m2/ h, ammonia oxidation rate keep 75% or so.C1 controls speed of agitator 30r/min, and for control DO in 2.5-3.0mg/L, aeration is strong Degree is 5.5m3/m2/h.C2 controls speed of agitator 35r/min, controls DO in 1.5mg/L or so, aeration intensity 3.0m3/m2/ h, C3 controls speed of agitator 40r/min, and DO is in 2mg/L or so, aeration intensity 3.0m3/m2/h.Made by Open valve E3, E4 Water outlet collects wet well, wet well part effluent recycling to denitrification pond, and residue water outlet is discharged through outlet pipe, runs 32 days, C2 TN removal surface loading reach 1.72gN/m2/ d, denitrification pond BOD5Removal rate 80%, into next step；
Autotrophic denitrification expands starting, using bi serie A operational mode, continuum micromeehanics；By in C4 and C3 reaction tank with C1 and The suspending carrier of difference 50% in C2 reaction tank is replaced；Each reaction tank controls speed of agitator 30r/min, and DO is in 2.5- 3.0mg/L, aeration intensity 4.5m3/m2/ h makes water outlet collect wet well, the water outlet of wet well part by Open valve E2, E3 It is back to denitrification pond, residue water outlet is discharged through outlet pipe, and after operation 14 days, each reaction tank TN removal surface loading is more than 2.25gN/m2/ d, denitrification pond BOD5Removal rate 70%, into next step；
Autotrophic denitrification system stable operation, using parallel running mode, each reaction tank controls DO in 3.5mg/L, aeration Intensity 5.0m3/m2/ h makes water outlet collect wet well, wet well part effluent recycling to denitrification by Open valve E1-E4 Pond, residue water outlet are discharged through outlet pipe, and each reaction tank nitrogen removal rate reaches 88%, and each reaction tank total nitrogen goes membrane removal load maximum Reach 3.59gN/m2/ d, corresponding volumetric loading reach 1.43kgN/m3/ d, denitrification pond BOD5Removal rate 70%, denitrification pond TN are gone Except surface loading 1.92gN/m2/ d opens water distribution bottom first row mud mouth every 10d and carries out spoil disposal.
In above-mentioned steps, wet well reflux ratio is controlled always 250%, and start-up course denitrification pond controls speed of agitator 45r/min, final stable operation stage whole system nitrogen removal rate reach 85%, wherein the total nitrogen removal of denitrification pond contribution Rate is 20%.
The present invention controls four reaction tank water discharging directions by communicating valve and realizes reaction tank series connection, arranged side by side or isolated operation； By be inoculated with, flow plus etc. means realize autotrophic denitrification technique quick start；According to processing standard requirements, different technique is realized Arrangement form.
It uses for reference the prior art and can be realized in the part that do not addressed in the present invention.
It should be noted that any equivalent way that those skilled in the art are made under the introduction of this specification, or Obvious variant should all be within the scope of the present invention.

Claims (8)

1. a kind of efficient autotrophic denitrification system based on MBBR comprising centerwell, reaction tank main body, reflux unit, connection dress It sets and aerator, it is characterised in that:
The reaction tank main body is four reaction tanks of two rows of two column, respectively the first reaction tank, the second reaction tank, third reaction Pond and the 4th reaction tank, wherein the first reaction tank and the 4th reaction tank for a row and are located at bottom, and the first reaction tank and second is instead Ying Chiwei mono- is arranged；
The centerwell is located at the center of four diagonal lines of reaction tank comprising denitrification pond, distribution well and Wet well, three is concentric circles pond body, and is followed successively by denitrification pond, distribution well and wet well from inside to outside；
The water inlet in the denitrification pond is connected with water inlet manifold road, and treatment sewage enters institute through the water inlet manifold road The bottom in denitrification pond is stated, the pond body top in the denitrification pond is provided with interception sieve；Treatment sewage is through the anti-nitre The interception sieve for changing pond pond body top enters the distribution well, is connected between the distribution well and each reaction tank, and be used for It intakes into each reaction tank, the water distribution bottom is provided with the first mud discharging mouth；The wet well is anti-for collecting four The water outlet of Ying Chi, and be discharged through the outlet pipeline on the wet well top, the water outlet bottom is provided with the second mud discharging mouth； Interception sieve is provided in the water outlet of each reaction tank；
First reaction tank and the second reaction tank, the second reaction tank and third reaction tank, third reaction tank and the 4th reaction Between pond, the 4th reaction tank and the first reaction tank respectively by the first connecting line, the second connecting line, third connecting line and The connection of 4th connecting line；
The communication apparatus includes communicating valve, the communicating valve include the first communicating valve on the first connecting line, The second communicating valve on the second connecting line, the third connecting valve on third connecting line and be located at the 4th connecting tube 4th communicating valve of road；First is respectively arranged with close to first reaction tank of centerwell and the upper side of the 4th reaction tank Water inlet and the 4th water inlet are respectively arranged with the close to second reaction tank of centerwell and the side-lower of third reaction tank Two water inlets and third water inlet are distinguished by first water inlet, the second water inlet, third water inlet and the 4th water inlet It intakes into the first reaction tank, the second reaction tank, third reaction tank and the 4th reaction tank；
Agitating device is provided with inside the denitrification pond and inside each reaction tank；
The reflux unit, including reflux pump are arranged on the return pipe of the water outlet bottom connection, and described returns The other end of flow tube is passed through the denitrification pond；
The aerator is distributed in each reaction tank, and has been added suspension in denitrification pond and each reaction tank and carried Body.
2. a kind of efficient autotrophic denitrification system based on MBBR according to claim 1, it is characterised in that: described first Water inlet, the second water inlet, third water inlet and the 4th water inlet pass through the first inlet pipeline, the second inlet pipeline, respectively Three inlet pipelines and the 4th inlet pipeline are connect with the distribution well, and be provided on first inlet pipeline first into The second inlet valve is arranged on the second inlet pipeline for water valve, is arranged third inlet valve on third inlet pipeline, on the 4th inlet pipeline 4th inlet valve is set；The interception sieve includes the first interception sieve, the second interception sieve, third interception sieve and the 4th Sieve is intercepted, the described first interception sieve, the second interception sieve, third intercept sieve, the 4th interception sieve is located at the In one reaction tank, the second reaction tank, third reaction tank and the 4th reaction tank.
3. a kind of efficient autotrophic denitrification system based on MBBR according to claim 1, it is characterised in that: each reaction tank Interior aerator is made of multiple groups boring aeration pipe and micropore aeration pipe.
4. a kind of efficient autotrophic denitrification system based on MBBR according to claim 2, it is characterised in that: the first reaction Pond, the second reaction tank, third reaction tank, the 4th reaction tank water outlet pass through respectively the first outlet pipeline, the second outlet pipeline, Third outlet pipeline and the 4th outlet pipeline are connect with the wet well, and in the first outlet pipeline, the second outlet pipeline, Three outlet pipelines and the 4th outlet pipeline are correspondingly arranged on the first outlet valve, the second outlet valve, third outlet valve and the 4th water outlet Valve.
5. a kind of operation method of efficient autotrophic denitrification system based on MBBR according to claim 4, which is characterized in that It includes following three kinds of control models:
The first, parallel running mode:
First reaction tank, the second reaction tank, third reaction tank and the 4th reaction tank is coordination, and each reaction tank is only Vertical water inlet, independent water outlet, and make water outlet be pooled to wet well by controlling related valve, it is discharged through outlet pipeline；
The second, bi serie A operational mode:
First reaction tank, the second reaction tank are one group, and the third reaction tank and the 4th reaction tank are one group, wait locate Manage sewage and pass through denitrification pond, the interception sieve through denitrification pond pond body top enters distribution well, respectively by the first water inlet, 4th water inlet continuously enters the first reaction tank, the 4th reaction tank, makes the water in the first reaction tank by controlling related valve It is finally pooled to wet well into the second reaction tank so that the water in the 4th reaction tank enters third reaction tank, through outlet pipeline Discharge；
Third, bi serie B operational mode:
First reaction tank, the second reaction tank, third reaction tank are one group, and the 4th reaction tank is one group, wait locate Manage sewage and pass through denitrification pond, the interception sieve through denitrification pond pond body top enters distribution well, respectively by the first water inlet, 4th water inlet continuously enters the first reaction tank, the 4th reaction tank, and is made in the first reaction tank by controlling related valve Water sequentially enters the second reaction tank, third reaction tank, and finally water outlet is pooled to wet well, is discharged through outlet pipeline.
6. a kind of operation method of efficient autotrophic denitrification system based on MBBR according to claim 5, which is characterized in that The parallel running mode specific steps are as follows: treatment sewage enters denitrification pond by the water inlet in denitrification pond, through anti- The interception sieve on nitrification tank pond body top enter after distribution well respectively by the first inlet valve, the second inlet valve, third inlet valve, 4th inlet valve and the first water inlet, the second water inlet, third water inlet and the 4th water inlet continuously enter each reaction tank, water outlet Respectively by first intercept sieve, second intercept sieve, third intercept sieve and the 4th intercept sieve, then by it is respective go out Water valve is discharged into wet well, is finally discharged by outlet pipeline.
7. a kind of operation method of efficient autotrophic denitrification system based on MBBR according to claim 5, which is characterized in that The bi serie A operational mode specific steps are as follows: treatment sewage enters denitrification pond by the water inlet in denitrification pond, passes through Denitrification pond pond body top intercepts sieve and enters after distribution well respectively by the first inlet valve, the 4th inlet valve and the first water inlet Mouthful, the 4th water inlet continuously enter the first reaction tank, the 4th reaction tank, the water outlet of the first reaction tank intercepts sieve, the by first One communicating valve, second intercept sieve and enter the second reaction tank, intercept sieve through second, the second outlet valve imports wet well through being discharged Pipeline water outlet；The water outlet of 4th reaction tank intercepts sieve by the 4th interception sieve, third connecting valve, third and enters third reaction Pond, the water outlet of third reaction tank import wet well after intercepting sieve, third outlet valve by third, are discharged through outlet pipeline.
8. a kind of operation method of efficient autotrophic denitrification system based on MBBR according to claim 5, which is characterized in that The bi serie B operational mode specific steps are as follows: treatment sewage enters denitrification pond by the water inlet in denitrification pond, passes through Denitrification pond pond body top intercepts sieve and enters after distribution well respectively by the first inlet valve, the 4th inlet valve and the first water inlet Mouthful, the 4th water inlet continuously enter the first reaction tank, the 4th reaction tank, the water outlet of the first reaction tank intercepts sieve, the by first One communicating valve, second intercept sieve and enter the second reaction tank, and the water outlet of the second reaction tank intercepts sieve, the second connection by second Valve, third intercept sieve and enter third reaction tank, and the water outlet of third reaction tank intercepts sieve by third, third outlet valve is pooled to It is discharged after wet well by outlet pipeline；The water outlet of 4th reaction tank intercepts sieve by the 4th, the 4th outlet valve imports wet well warp Outlet pipeline water outlet.
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CN102642924A (en) * 2012-04-26 2012-08-22 北京工业大学 Method for quickly starting completely autotrophic nitrogen removal over nitrite process on sewage on conditions of constant temperature and low ammonia nitrogen
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CN113788527A (en) * 2021-08-27 2021-12-14 同济大学 Load distribution sewage treatment system

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