CN109942154A - The method and system of the simultaneous aerobic FBC technical treatment sewage that is coupled of biology - Google Patents
The method and system of the simultaneous aerobic FBC technical treatment sewage that is coupled of biology Download PDFInfo
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The present invention provides a kind of method and system of the simultaneous aerobic FBC technical treatment sewage that is coupled of biology.It handles to obtain mixed liquor this method comprises: pretreated raw water is sequentially sent to one section of anaerobic pond, two sections of anaerobic ponds, anoxic pond and the aerobic pond FBC and carries out denitrification dephosphorization technique；Mixed liquor is shunted, a part of mixed liquor sends anoxic pond back to via the oxygen pond that disappears, and another part mixed liquor is sent to final deposition pool and is handled to obtain sludge and sewage；Sewage is discharged into decontaminated water advanced treatment unit and carries out subsequent processing；Sludge is shunted, a part of sludge directly sends anaerobic pond back to, and another part sludge is sent to sludge deep processing unit and carries out subsequent processing.The present invention is ingenious integrated by carrying out town sewage energy recycling and short-cut nitrification and denitrification, prevailing technology Anammox, the perfect energy-saving carbon of realization system can be widely popularized in sewage treatment plant's upgrading and reclaimed wastewater reuse market in China.
Description
Technical field
The present invention relates to technical field of sewage, specifically, being related to a kind of simultaneous aerobic FBC technical office that is coupled of biology
Manage the method and system of sewage.
Background technique
Currently, basin of the China eight main river COD big (COD) lower than 150mg/L accounts for 50% or more, exist
Low COD high total nitrogen the case where, increase the difficulty of sewage treatment.It is de- to ensure for low strength COD, low carbon-nitrogen ratio sewage
The effect of nitrogen dephosphorization needs the supplementary carbon source into sewage.Current city sewage mention mark renovation technique difficulty it is big, how to realize low-carbon
The higher denitrogenation dephosphorizing rate of sewage, reaches the Effluent criteria of the quasi- IV class of earth's surface, is still pendulum realistic problem before eyes.
Summary of the invention
The object of the present invention is to provide a kind of simultaneous aerobic FBC (the Fluidized biological that is coupled of biology
Carriers, fluidization bio-carrier) technical treatment sewage method and system.
In order to achieve the object of the present invention, in a first aspect, the present invention provides a kind of biology the simultaneous aerobic FBC (fluidization that is coupled
Bio-carrier) technical treatment sewage method, comprising the following steps:
S1, raw water is pre-processed；
S2, pretreated raw water is sequentially sent to one section of anaerobic pond, two sections of anaerobic ponds, anoxic pond and the aerobic pond FBC into
Row denitrification dephosphorization technique handles to obtain mixed liquor；
S3, the mixed liquor of acquisition is shunted, wherein a part of mixed liquor sends anoxic pond back to via the oxygen pond that disappears, another
Part mixed liquor is sent to final deposition pool and is handled to obtain sludge and sewage；
S4, the sewage of acquisition is discharged into decontaminated water advanced treatment unit progress subsequent processing；The sludge of acquisition is divided
Stream, wherein a part of sludge directly sends anaerobic pond back to, and another part sludge is sent to sludge deep processing unit and carries out subsequent place
Reason.
Method above-mentioned, step S2 further include that appropriate raw water is each led into the anaerobic pond and anoxic pond, are denitrogenation
Dephosphorization process provides carbon source.
Method above-mentioned, in step S1, the pretreatment include the raw water is passed sequentially through to thick lattice coral, thin lattice coral carries out
Pre-filtering, the fine sand for then going partial size in water removal to be greater than 75um with waterpower rotation sand device, through waterpower rotation sand device treated water
It is sent into anaerobic pond.
Method above-mentioned, in one section of anaerobic pond: inflow is controlled 0~100%, and exteenal reflux sludge can fully enter
This section.HRT is 1.5-3h, and oxidation reduction potential control is 2000~8000mg/ in -100~-400mV, the concentration of activated sludge
L。
Method above-mentioned, in two sections of anaerobic ponds: inflow is controlled 0~100%, and exteenal reflux sludge can partially enter
This section.HRT is 1-2h, and oxidation reduction potential control is 4000~8000mg/L in -200~-500mV, the concentration of activated sludge.
In the anoxic pond: being arranged using pulling flow type, inflow control is in 0~50%, HRT 3-7h, redox electricity
Position control is 4000~8000mg/L in -150~-300mV, the concentration of activated sludge.
In the aerobic pond FBC: being arranged using circulation reciprocating type, HRT 4-9h；The end in the aerobic pond FBC is equipped with
Part flow arrangement, the ratio for branching to the sludge and sewage in the oxygen pond that disappears is 100-350%；Activated sludge in the aerobic pond FBC
Concentration be 4000~8000mg/L, oxidation reduction potential control in -150~+300mV, be discharged dissolved oxygen control 0.3~
1.8mg/L；The aerobic pond FBC is additionally provided with aerator.
In the oxygen pond that disappears: HRT 0.5-1.5h, oxidation reduction potential control is in+250~-100mV, the oxygen pond that disappears
The concentration of interior activated sludge is 4000~8000mg/L.By the respiration of system microorganism by the dissolved oxygen depletion in sewage
Totally.
In the present invention, the material of the FBC is modified HDPE, and main body is the hollow stereochemical structure with geometry, in
The heart designs for fenestral fabric；The biomass of the FBC carrying is 15~50mg/g carrier；The FBC is in the aerobic pond FBC
Packing ratio is 15%~45%.
Optionally, the stereochemical structure is surface mesoporous.It, can be negative according to actual treatment including 19 holes and two kinds of 37 holes specification
Lotus is selected.
Preferably, the main body of the FBC is hollow cylinder, and the surface of the cylindrical body is in undaform, and center is radiation
The design of shape network, specification are Φ 25mm × H10mm (Fig. 2A and Fig. 2 B).The FBC is in aerobic FBC Chi Zhongyu activated sludge
Mixing.
Further, the method also includes throwing into the conveyance conduit between the aerobic pond FBC and the final deposition pool
The step of adding chemical dephosphorization medicament.
Method above-mentioned, in step S4, the ratio for branching to the sludge in anaerobic pond is 50-100%.
In the present invention, the raw water includes low carbon-nitrogen ratio sewage (BOD5Ratio≤4 /TN).
Second aspect, the present invention provide a kind of sewage disposal system based on the simultaneous aerobic FBC technology that is coupled of biology, including
Pretreatment unit, FBC processing unit, final deposition pool, advanced treatment of wastewater unit, sludge deep processing unit, the first dividing cell
And second dividing cell；The advanced treatment of wastewater unit is connect with the final deposition pool；
The FBC processing unit includes sequentially connected one section of anaerobic pond, two sections of anaerobic ponds, anoxic pond and the aerobic pond FBC,
One section of anaerobic pond is connect with the pretreatment unit；
First dividing cell respectively with the aerobic pond FBC, it is described disappear oxygen pond and the final deposition pool is connect, for will
Mixed liquor in the aerobic pond FBC carries out shunting processing；Second dividing cell respectively with the final deposition pool, anaerobic pond and
Sludge deep processing unit connection, for the sludge in the final deposition pool to be carried out shunting processing.
Wherein, the pretreatment unit includes sequentially connected coarse rack, fine fack and waterpower rotation sand device, the waterpower rotation
The water outlet of sand device is connect with one section of anaerobic pond.
The advanced treatment of wastewater unit includes sequentially connected depth-type filtration pond and contact chamber, the depth-type filtration pond with
The final deposition pool connection.
First dividing cell includes backflow mixed liquor pump and residual mixed liquor pump, backflow mixed liquor pump with it is described
Disappear the connection of oxygen pond, and the residual mixed liquor pump is connect with the final deposition pool.
Second dividing cell includes return sludge pump and residual sludge pump, the return sludge pump and the anaerobic pond
Connection, the residual sludge pump are connect with the sludge deep processing unit.
In the present invention, the major function of one section of anaerobic pond includes: hydrolysis larger molecular organics, release P, denitrification,
Disappear oxygen, consumes NO3-.The bacterium for playing main function includes: hydrolysis acidification bacterium, polyP bacteria, denitrifying bacterium, short-cut denitrification bacterium
Deng.
The major function of two sections of anaerobic ponds includes: release P, and reinforced anaerobic hydrolyzes, acidification, Anammox,
Denitrification.The bacterium for playing main function includes: hydrolysis acidification bacterium, polyP bacteria, denitrifying bacterium, short-cut denitrification bacterium, anaerobism ammonia
Oxidation bacteria etc..
The major function of the anoxic pond includes: except P, Anammox, synchronous nitration, denitrification.Play main function
Bacterium include: hydrolysis acidification bacterium, polyP bacteria, ammonia oxidation bacteria, denitrifying bacterium, short-cut denitrification bacterium, anaerobic ammonia oxidizing bacteria etc..
The major function in the aerobic pond FBC include: except P, short distance nitration, Anammox, synchronous nitration, denitrification,
Carbonization.The bacterium for playing main function includes: heterotrophic bacteria, autotrophic bacterium, polyP bacteria, ammonia oxidation bacteria, nitrifier, denitrifying bacterium, good
Oxygen denitrifying bacterium, short-cut denitrification bacterium, anaerobic ammonia oxidizing bacteria etc..
The oxygen pond that disappears is connect with the aerobic pond FBC and the anoxic pond respectively, and the oxygen pond that disappears includes active dirt
Mud, mainly heterotrophic bacteria play a role, in the case where not outer oxygen, using in the own growth activity consumption water of cell
Residual oxygen.The concentration of activated sludge is 4000~8000mg/L in the oxygen pond that disappears.
By above-mentioned technical proposal, the present invention at least have following advantages and the utility model has the advantages that
(1) present invention provides a kind of new method of the simultaneous aerobic FBC biological treatment low carbon-nitrogen ratio sewage that is coupled of biology.Benefit
Town sewage energy recycling and short-cut nitrification and denitrification, prevailing technology can be detested with sewage disposal system provided by the invention
Anaerobic ammonium oxidation carries out ingenious integrated, realizes the perfect energy-saving carbon of system, can sewage treatment plant's upgrading in China
It is widely popularized in reclaimed wastewater reuse market.
(2) using the method for the present invention and processing system in the case where BOD/TN of intaking is too low, if BOD is 5mg/L, always
In the case that nitrogen is 35mg/L, water outlet total nitrogen only relies on biological treatment up to 10mg/L or less.
(3) biomembrane (i.e. mycoderm on FBC) in sewage disposal system of the present invention, activated sludge, sewage, between aeration
The biology and phase microenvironment for foring a multiphase, substantially increase the denitrification effect of system.
(4) present invention is acted on by the sufficiently extension anaerobism time using hydrolysis acidification, improves the ratio between the BOD in water,
More VFA are generated simultaneously, release phosphorus for polyP bacteria.
(5) present invention sufficiently extends hypoxic exposure, utilizes the abundant denitrification denitrogenation of internal carbon source.In denitrification heterotroph
Under effect, is disintegrated using intracellular polymer (PHA) and activated sludge itself as carbon source, make NO3- N is reduced to N2Hence into big
Gas.
(6) polyP bacteria in the present invention includes two class Pseudomonas, and one kind can only be referred to as aerobic using oxygen as electron acceptor
PolyP bacteria, and it is another kind of can be using nitrate as electron acceptor with oxygen, i.e. Denitrifying Phosphate Accumulating Organisms DPB.Denitrification dephosphorization
Two processes of denitrification and dephosphorization are combined into one, a carbon is dual-purpose, has achieved the purpose that synchronous denitrification dephosphorizing, realizes that denitrification removes
Phosphorus can be with the biological phosphate-eliminating problem under the conditions of effective solution low-carbon.
(7) under conditions of the micro- oxygen in part, the synchronous nitration and denitrification (simultaneous of packing area
Nitrification and dinitrification, SND), synchronous nitration and denitrification technology is, it can be achieved that in a reactor
It is interior to remove carbon, nitrification and denitrification, have and be not necessarily to additional carbon, the advantages of economic operating cost.Traditional biological denitrogenation technology utilizes
It is the nitrification and denitrification effect of microorganism.I.e. under conditions of aerobic, ammoxidation is nitrification by autotrophic type nitrobacteria
Nitrous acid (salt) and nitric acid (salt)；Denitrification refers to nitrous acid (salt) and nitric acid (salt) in the effect of different oxygen type denitrifying bacterium
Under, it is reduced to the process of nitrogen.Dissolved oxygen (DO) gradient is formd in microorganism wadding body and biomembrane.In microorganism wadding body or life
Object film outer surface dissolved oxygen is higher, and microbial flora is based on aerobic bacteria, nitrifier；Go deep into inside biomembrane, since oxygen transmits
It is obstructed and the consumption of oxidation operation, nitrification, formation anoxic zone, denitrifying bacterium is dominant；Just because of in biomembrane
There are anaerobic environments in portion, lead to the generation of synchronous nitration and denitrification phenomenon.
(8) present invention by dissolved oxygen, ORP, internal reflux ratio, external reflux ratio, water inlet each parameter such as distribution ratio item
Part finally realizes efficient biological carbon and phosphorous removal.
Detailed description of the invention
Fig. 1 is the method and system of the 1 simultaneous aerobic FBC technical treatment low carbon-nitrogen ratio sewage that is coupled of biology of the embodiment of the present invention
Denitrification dephosphorization technique route flow chart.
Fig. 2A is the photo in kind of FBC in the embodiment of the present invention 1.
Fig. 2 B be the bio-carrier used in FBC technique in the embodiment of the present invention 1 top view (on) and column side face exhibition
Open figure (under).
Fig. 3 is the method and system of the 1 simultaneous aerobic FBC technical treatment low carbon-nitrogen ratio sewage that is coupled of biology of the embodiment of the present invention
Denitrification dephosphorization technique bio-reaction zone plan view.Wherein, 1- coarse rack, the ultra-fine grid of 2-, 3- waterpower revolve sand device, and mono- section of 4- is detested
Oxygen pond, bis- sections of anaerobic ponds of 5-, 6- anoxic pond, the aerobic pond FBC 7-, 8- disappear oxygen pond, 9- final deposition pool, 10- depth-type filtration pond, and 11- connects
Touch sterilization pool, return pipe in 12-, 13- exteenal reflux pipe.1. water, 2.-standard discharge.
Specific embodiment
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..Unless otherwise specified, embodiment
Used in the conventional means that are well known to those skilled in the art of technological means, raw materials used is commercial goods.
The method and system of the 1 simultaneous aerobic FBC technical treatment low carbon-nitrogen ratio sewage that is coupled of biology of embodiment
As shown in Figure 1, the method for the simultaneous aerobic FBC technical treatment low carbon-nitrogen ratio sewage that is coupled of biology provided in this embodiment
The following steps are included:
S1, raw water is pre-processed；
S2, pretreated raw water is sequentially sent to one section of anaerobic pond, two sections of anaerobic ponds, anoxic pond and the aerobic pond FBC into
Row denitrification dephosphorization technique handles to obtain mixed liquor；
S3, the mixed liquor of acquisition is shunted, wherein a part of mixed liquor sends anoxic pond back to via the oxygen pond that disappears, another
Part mixed liquor is sent to final deposition pool and is handled to obtain sludge and sewage；
S4, the sewage of acquisition is discharged into decontaminated water advanced treatment unit progress subsequent processing；The sludge of acquisition is divided
Stream, wherein a part of sludge directly sends anaerobic pond (one section of anaerobic pond and/or two sections of anaerobic ponds) back to, and another part sludge is sent to
Sludge deep processing unit carries out subsequent processing.
In step S1, the pretreatment includes that the raw water is passed sequentially through to thick lattice coral, the progress pre-filtering of thin lattice coral, then
It goes partial size in water removal to be greater than the fine sand of 75um with waterpower rotation sand device, is sent into anaerobic pond through waterpower rotation sand device treated water.
In one section of anaerobic pond: inflow is controlled 0~100%, and exteenal reflux sludge can fully enter this section.HRT is
1.5-3h, oxidation reduction potential control is in -100~-400mV.The concentration of activated sludge is 3000~8000mg/L.
In two sections of anaerobic ponds: inflow is controlled 0~100%, and exteenal reflux sludge can fully enter this section.HRT=
1-2h.Redox potential range is in -200~-500mV.The concentration of activated sludge is 4000~8000mg/L.
In the anoxic pond: being arranged using pulling flow type, inflow control is in 0~50%, HRT 3-7h, redox electricity
Position control is in -150~+300mV.The concentration of activated sludge is 4000~8000mg/L.
In the aerobic pond FBC: being arranged using circulation reciprocating type, HRT 4-9h；The end in the aerobic pond FBC is equipped with
Part flow arrangement, the ratio for branching to the sludge and sewage in the oxygen pond that disappears is 100-350%；Activated sludge in the aerobic pond FBC
Concentration be 4000~8000mg/L, oxidation reduction potential control in -150~+300mV, be discharged dissolved oxygen control 0.3~
1.8mg/L；The aerobic pond FBC is additionally provided with aerator.
In the oxygen pond that disappears: HRT 0.5-1.5h, oxidation reduction potential control is in+250~-100mV.It is micro- by system
Biology respiration by the dissolved oxygen depletion in sewage totally.
The oxygen pond FBC that disappears is connect with the aerobic pond FBC and the anoxic pond respectively, is free of in the oxygen pond FBC that disappears
Active sludge.
Each unit main function is as follows:
Using anaerobic pond, by biological and phase technology, the activated sludge in pond is to the particulate matter and colloid substances in sewage
Matter retention and absorption, this is a quick physical process, can be completed in more than ten seconds or tens seconds.Anaerobic pond is logical simultaneously
Biological and phase technology is crossed, under the action of anaerobic bacteria, denitrification is carried out to exteenal reflux Central Asia nitrate first, then by this in water
A little bulky grain substance decompositions difficult to degrade are the degradable VFA (volatile fatty acid) of small molecule, and enough VFA make poly- phosphorus
Bacterium quickly thoroughly discharge to phosphorus in anaerobism section, absorb excessive phosphorus for aerobic section and prepare.
Using anoxic pond, anoxic section realizes biology and phase separation, can the efficient conventional denitrification of imparting system and short distance it is anti-
Nitrification ability.Specifically, by the domestication of certain time, the microenvironment suitable for denitrifying bacteria growth can be formed, is denitrification
Suitable environment is created in growth, the breeding of bacterium；The high concentration denitrifying bacterium of enrichment can accelerate system denitrification rate, so that instead
Nitration reaction quickly completes in limited hydraulic detention time；Simultaneously in certain sludge concentration, in activated sludge
Portion can form the gradient distribution of multiple-microorganism, it can be achieved that synchronizing the ability of short-cut denitrification, denitrification dephosphorization.
Using the aerobic pond FBC, biology and phase technology obtain maximum efficacy exertion, in gas phase, liquid phase, mud phase, film
In phase formed multiphase microenvironment, it can be achieved that many energy-saving carbon such as short-cut nitrification and denitrification, short distance nitration Anammox it is anti-
It answers.
Using the oxygen pond that disappears, effect is mainly that heterotrophic bacteria plays a role, and in the case where not outer oxygen, utilizes cell
Own growth activity consumes the residual oxygen in water.
Specifically, preceding method includes:
1, what water first passed around coarse rack 1 and ultra-fine grid 2 filters off sundries in water removal, revolves sand device 3 by waterpower and goes
Partial size is greater than the fine sand of 75um in water removal, and removal rate can achieve 95%.Exposure that can be more traditional while by waterpower desanding
Gas settling pit recycles more water carbon sources.
2, water inlet can it is as needed 0~100% enter one section of anaerobic pond 4 (one section of anaerobic zone), exteenal reflux sludge can be whole
Into this section.HRT=1.5-3h.Redox potential range is in -100~-400mV.The concentration of activated sludge be 3000~
8000mg/L。
3, water inlet can it is as needed 0~100% enter two sections of anaerobic ponds 5 (two sections of anaerobic zones), exteenal reflux sludge can part
Into this section.HRT=1-2h.Redox potential range is in -200~-500mV.The concentration of activated sludge be 4000~
8000mg/L。
4, water inlet can it is as needed 0~50% enter anoxic pond 6 (anoxic zone), use pulling flow type to arrange, HRT=3-
7h.Oxidation-reduction potential is successively decreased after go to distribution, and redox potential range is in -150~-300mV.The concentration of activated sludge
For 4000~8000mg/L.
5, the aerobic pond FBC 7 (aerobic zone) is arranged in the form of recycling past backflow, HRT=4-9h.The setting of aerobic tank end
Interior reflux (the aerobic pond FBC and anoxic pond are connected by interior return pipe 12), reflux ratio 100-350%.Sludge concentration MLSS is
4000~8000mg/L, redox potential range are discharged 0.3~1.8mg/L of dissolved oxygen in -150~+300mV.
6, interior backflow mixed liquor is introduced into the oxygen pond 8 that disappears (area Xiao Yang), and HRT=0.5~1.5h, redox potential range exists
+ 250~-100mV, the concentration of activated sludge are 4000~8000mg/L.It will be in sewage by the respiration of system microorganism
Dissolved oxygen depletion totally.The carbon source in water is consumed so as to avoid the dissolved oxygen in interior reflux, improves system TN
Removal efficiency.
7, aerobic tank end, which uses to synchronize, adds chemical dephosphorization medicament, supplements chemical dephosphorization.Medicament is using conventional chemistry
Dephosphorization reagent, such as Polyferric Sulfate, poly-aluminium, polymeric ferric aluminum etc..Dosage is added according to the concentration of phosphorus in practical water, about 0~20mg/L it
Between.
8, for final deposition pool 9 for being separated by solid-liquid separation, clear water flows into subsequent processing units.Bottom precipitation sludge part is as exteenal reflux
(being connect final deposition pool with one section of anaerobic pond, two sections of anaerobic ponds by exteenal reflux pipe 13) supplements biological tank concentration, external reflux ratio
50-100%；Part enters mud processing unit, processing outward transport.
9, filtering cloth filtering pool, sand filter etc. can be used in depth-type filtration pond 10, using work principle of filter, removes SS in water removal.
10, the filtering of disinfecting tank 11 water outlet enters qualified discharge after disinfecting tank dosing disinfection.
This system can realize the higher nitrogen removal rate of low-carbon sewage, can meet national key area and major river valley to dirt
The requirements at the higher level that water process proposes, such as the Effluent criteria of the quasi- IV class of earth's surface.
The present embodiment also provides the sewage disposal system to match with the above method, including pretreatment unit, FBC processing list
Member, final deposition pool, advanced treatment of wastewater unit, sludge deep processing unit, the first dividing cell and the second dividing cell；The dirt
Water depth processing unit is connect with the final deposition pool；Wherein, final deposition pool is the important component of activated Sludge System, effect
Sludge mainly is separated, make clarification of water and carries out sludge condensation.
The FBC processing unit includes sequentially connected one section of anaerobic pond, two sections of anaerobic ponds, anoxic pond and the aerobic pond FBC,
One section of anaerobic pond is connect with the pretreatment unit；
First dividing cell (interior shunting) connects with the aerobic pond FBC, oxygen pond and the final deposition pool of disappearing respectively
It connects, for the mixed liquor in the aerobic pond FBC to be carried out shunting processing；Second dividing cell (external shunt) respectively with institute
Final deposition pool, anaerobic pond and the connection of sludge deep processing unit are stated, for the sludge in the final deposition pool to be carried out shunting processing.
The material of the FBC is modified HDPE (You Puhua Environmental Protection Co.Ltd. provides), and main body is hollow cylinder,
The surface of the cylindrical body is in undaform, and center is the design of radial network, and surface can mesoporous (19 holes and two kinds of 37 holes rule
Lattice).Specification is Φ 25mm × H10mm (Fig. 2A and Fig. 2 B).The biomass range of the FBC carrying is in 15~50mg/g carrier.
Packing ratio of the FBC (filler) in the aerobic pond FBC is 15%~45%, and the FBC is in aerobic FBC Chi Zhongyu activated sludge
Mixing.
Specifically, in anaerobic pond by biology and phase technology, under the action of anaerobic bacteria, first to exteenal reflux Central Asia nitric acid
Salt carries out denitrification, these bulky grain hard-degraded substances in water are then decomposed into the degradable VFA (volatile fat of small molecule
Acid), enough VFA discharge polyP bacteria rapidly and thoroughly to phosphorus in anaerobism section, absorb for aerobic section excessive
Phosphorus prepare；The microenvironment grown suitable for denitrifying bacteria can be formed by biology and phase technology in anoxic pond, be denitrification
Bacterial growth, breeding create suitable environment.Wherein, can be added by the high concentration denitrifying bacterium of the biotechnology enrichment of simultaneous phase
Fast system denitrification rate, so that anti-nitration reaction quickly completes in limited hydraulic detention time；Simultaneously in fluidized state
Under, internal system can form the gradient distribution of multiple-microorganism, it can be achieved that synchronizing the ability of short-cut denitrification.In the aerobic area FBC,
Biological and phase technology obtains maximum efficacy exertion, and multiphase microenvironment is formed in gas phase, liquid phase, mud phase, film phase, can be real
The reaction of many energy-saving carbon such as existing short-cut nitrification and denitrification, short distance nitration Anammox.
Specifically, the pretreatment unit includes sequentially connected coarse rack, fine fack and waterpower rotation sand device, the waterpower
The water outlet of rotation sand device is connect with one section of anaerobic pond.
Specifically, first dividing cell includes backflow mixed liquor pump and residual mixed liquor pump, the backflow mixed liquor
Pump is connect with the oxygen pond that disappears, and the residual mixed liquor pump is connect with the final deposition pool.In the present embodiment, it is handled through aerobic tank
On the one hand backflow mixed liquor is delivered to by backflow mixed liquor pump and is disappeared in oxygen pond, on the other hand passed through by the mixed liquor obtained afterwards
Residual mixed liquor pump is delivered to final deposition pool and carries out subsequent processing by residual mixed liquor pump.Wherein, the reflux type of this mixed liquor
Reflux in referred to as.
Specifically, second dividing cell includes return sludge pump and residual sludge pump, the return sludge pump and institute
Anaerobic pond connection is stated, the residual sludge pump is connect with the sludge deep processing unit.In the present embodiment, at through final deposition pool
The sludge obtained after reason enters reflux and excess sludge pump house.In the present embodiment, by return sludge pump that returned sludge is defeated
It send to anaerobic pond, and excess sludge is delivered to by sludge deep processing unit by residual sludge pump and carries out subsequent processing.Its
In, the reflux type of this sludge is referred to as exteenal reflux.
Specifically, the advanced treatment of wastewater unit includes sequentially connected depth-type filtration pond and contact chamber, the depth
Filtering ponds are connect with the final deposition pool.
Biology of the invention is simultaneous to be coupled in the method and system embodiment 1 of aerobic FBC technical treatment low carbon-nitrogen ratio sewage
Denitrification dephosphorization technique route flow chart is shown in Fig. 1.
The denitrogenation of the method and system embodiment of the simultaneous aerobic FBC technical treatment low carbon-nitrogen ratio sewage that is coupled of biology of the invention
Dephosphorization process bio-reaction zone plan view is shown in Fig. 3.
Using biology provided by the invention and phase technology, after debugging and constantly optimization runs sewage disposal system, biology
Denitrogenation dephosphorizing efficiency is constantly improve, and whole year is not necessarily to additional carbon.What the dissolved oxygen of entire sewage treatment plant's biochemistry part all controlled
It is relatively low, anaerobism and anoxic zone are enhanced significantly to the removal effect of major pollutants, and ton water power is consumed less than 0.15 yuan, is typical
Biology and phase processor low-carbon sewage case, the good result with energy-saving carbon.Again after filter and disinfection, out
All indexs of water are significantly better than level-one emission standard A, reach the quasi- IV class water quality standard of earth's surface.
2 case history of embodiment
For the method using the simultaneous aerobic FBC technical treatment sewage that is coupled of biology provided by the invention is better described and is
The beneficial effect that system reaches, is illustrated by taking an engineering construction as an example below:
Certain sewage treatment plant, total scale day handle 100,000 tons.The end of the year 2017 carried out mentioning mark according to 1 method of embodiment to be changed
It makes.
One section of anaerobic pond function: anaerobic pond carries out release and the hydrolysis acidification of phosphorus.HRT=2.2h.Water inlet can as needed 0
~100% enters one section of anaerobic pond, and exteenal reflux sludge can fully enter this section.Oxidation reduction potential control -100~-
400mV.The concentration of activated sludge is 3000~8000mg/L.
Two sections of anaerobic pond operations, the release of further progress phosphorus and hydrolysis acidification.HRT=1h.Water inlet can as needed 0~
100% enters two sections of anaerobic ponds, and exteenal reflux sludge can partially enter this section.Redox potential range is in -200~-500mV.
The concentration of activated sludge is 4000~8000mg/L.
Pulling flow type anoxic zone HRT=4.9h.Redox potential range is in -150~-300mV.The concentration of activated sludge is
4000~8000mg/L.
Flow back the area Xiao Yang HRT=1h.Redox potential range is in+250~-100mV.The concentration of activated sludge is 4000
~8000mg/L.
The aerobic pond FBC is the type pond body that moves in circles, reflux in the setting of aerobic tank end, reflux ratio 100-350%.HRT=
5.9h.Oxidation reduction potential control is in -150~+300mV.The concentration of activated sludge is 4000~8000mg/L.It is discharged dissolved oxygen
0.3~1.8mg/L.
Packing ratio of the FBC (filler) in the aerobic pond FBC is 30% or so.
The laying of remaining each unit is the same as described in embodiment 1.
Hanzhong City municipal wastewater treatment plant over time, become better and better, and see Table 1 for details by treatment effect after proposing mark transformation.Especially
After its in November, 2018, although water temperature is constantly reduced from 25 DEG C of summer, winter sewage plant inflow temperature can down to 7~9 DEG C,
For treatment effect, COD is basically unchanged, and TN is increased, and the effect of TP is substantially better than summer.The reason of TN is increased mainly water
Temperature produces influence to denitrification rate.And the reduction of TP has three aspect reasons: 1) over time, operational management personnel
More and more deep to the understanding of new process, the control and operation to each parameter are also further skilled.2) most critical, this engineering is from beginning
It can monitor that apparent biology releases phosphorus phenomenon (5~10mg/L) to whole anaerobic zone end, before October, inhale phosphorus phenomenon
Occur in aerobic zone, and the control to biological tank dissolved oxygen is increased by robot control system(RCS) after October, so that anoxic zone dissolved oxygen
Lower than 0.1mg/L, in the case where carbon source wretched insufficiency, apparent denitrification dephosphorization phenomenon is had occurred in anoxic zone.3) due to inciting somebody to action
Chemical dephosphorization medicament is changed to liquid Dephosphorization reagent from solid state powder is added, and adds strength and stability and is greatly improved, practical
Dosage has dropped 30% instead.
The transformation of table 1 front and back Inlet and outlet water water quality
This engineering BOD/TN is far below theoretical value 2.86, and ratio needed for traditional activated sludge process is 4, but achieves good
Treatment effect.Analyzing main cause includes the following: (1) this engineering has fully considered that the oxygen that disappears of reflux and exteenal reflux is asked
Topic, also depth avoids activated sludge since constantly circulation causes denitrifying bacteria by one between anaerobic/anoxic aerobic zone
Fixed inhibition.Denitrification efficiency is greatly improved, and carbon source is not easy to be wasted, and utilization of carbon source rate can be improved.(2) this engineering exists
Anoxic zone realizes the synchronous dephosphorization of good denitrification, and total phosphorus has obtained greatly discharging in anaerobic zone, but several in anoxic zone
Complete removal is obtained, a carbon is dual-purpose, and carbon source is greatly saved.(3) this engineering enhances anaerobism, anoxic zone, when stop
Between, it is increased twice compared with traditional design, takes full advantage of the internal carbon source of system, micro- life can be passed through in the case where carbon source exhausts
Object itself further increases the TN removal rate of system as carbon source, and internal carbon source denitrification rate is usually conventional denitrification rate
1/3, but facts proved that be it is effective and be conducive to realize.(4) originally guaranteed well by engineering and technological means
Filler fluidised form environment under, by aerobic packing area dissolved oxygen control in 2mg/L.In the case where 30% filler packing ratio, filler
There is local short-cut nitrification and denitrification phenomenon inside biomembrane, system carbon source is also greatly saved while saving aeration.Through
In aerobic zone water outlet dissolved oxygen 1.2mg/L or so, this engineering aerobic zone can reach 10% to the removal rate of total nitrogen for measurement.In recent years
Carry out people and find denitrogenation phenomenon under aerobic condition in practical projects, as Pochana observed 95% in sbr reactor device
Nitrogen removal rate.Multiple multiphases are formd between biomembrane, activated sludge, sewage, aeration in this engineered biological reaction tank
Biological microenvironment, it is also possible to there are aerobic denitrifying bacterias, need subsequent further investigation.
Although above the present invention is described in detail with a general description of the specific embodiments,
On the basis of the present invention, it can be modified or is improved, this will be apparent to those skilled in the art.Cause
This, these modifications or improvements, fall within the scope of the claimed invention without departing from theon the basis of the spirit of the present invention.
Claims (10)
1. the method for the simultaneous aerobic FBC technical treatment sewage that is coupled of biology, which comprises the following steps:
S1, raw water is pre-processed；
S2, it pretreated raw water is sequentially sent to one section of anaerobic pond, two sections of anaerobic ponds, anoxic pond and the aerobic pond FBC takes off
Nitrogen dephosphorization process handles to obtain mixed liquor；
S3, the mixed liquor of acquisition is shunted, wherein a part of mixed liquor sends anoxic pond, another part back to via the oxygen pond that disappears
Mixed liquor is sent to final deposition pool and is handled to obtain sludge and sewage；
S4, the sewage of acquisition is discharged into decontaminated water advanced treatment unit progress subsequent processing；The sludge of acquisition is shunted,
In, a part of sludge directly sends anaerobic pond back to, and another part sludge is sent to sludge deep processing unit and carries out subsequent processing.
2. the method according to claim 1, wherein step S2 further includes dividing into the anaerobic pond and anoxic pond
It is not passed through appropriate raw water, provides carbon source for denitrification dephosphorization technique.
3. the method according to claim 1, wherein in step S1, the pretreatment include by the raw water according to
It is secondary that pre-filtering is carried out by thick lattice coral, thin lattice coral, fine sand of the partial size greater than 75um in water removal then is removed with waterpower rotation sand device, through institute
It states waterpower rotation sand device treated water and is sent into anaerobic pond.
4. the method according to claim 1, wherein in one section of anaerobic pond: inflow control 0~
100%, HRT 1.5-3h, oxidation reduction potential control in -100~-400Mv, the concentration of activated sludge is 2000~
8000mg/L；And/or
In two sections of anaerobic ponds: inflow control in 0~100%, HRT 1-2h, oxidation reduction potential control -200~-
500Mv, the concentration of activated sludge are 4000~8000mg/L；And/or
In the anoxic pond: being arranged using pulling flow type, inflow is controlled in 0~50%, HRT 3-7h, oxidation-reduction potential control
System is 4000~8000mg/L in -150~-300mV, the concentration of activated sludge；And/or
In the aerobic pond FBC: being arranged using circulation reciprocating type, HRT 4-9h；The end in the aerobic pond FBC, which is equipped with, to be shunted
Device, the ratio for branching to the sludge and sewage in the oxygen pond that disappears is 100-350%；Activated sludge is dense in the aerobic pond FBC
Degree is 4000~8000mg/L, and oxidation reduction potential control is discharged dissolved oxygen control in 0.3~1.8mg/ in -150~+300mV
L；The aerobic pond FBC is additionally provided with aerator；And/or
In the oxygen pond that disappears: HRT 0.5-1.5h, oxidation reduction potential control is in+250~-100mV, the concentration of activated sludge
For 4000~8000mg/L.
5. main body is with several the method according to claim 1, wherein the material of the FBC is modified HDPE
The hollow stereochemical structure of what shape, center is designed for fenestral fabric；The biomass of the FBC carrying is 15~50mg/g load
Body；Packing ratio of the FBC in the aerobic pond FBC is 15%~45%；
Preferably, the main body of the FBC is hollow cylinder, and the surface of the cylindrical body is in undaform, and center is radial net
The design of lattice structure, specification are Φ 25mm × H10mm.
6. the method according to claim 1, wherein the method also includes to the aerobic pond FBC and described
The step of chemical dephosphorization medicament is added in conveyance conduit between final deposition pool.
7. the method according to claim 1, wherein branching to the ratio of the sludge in anaerobic pond in step S4
For 50-100%.
8. method according to claim 1-7, which is characterized in that the raw water includes low carbon-nitrogen ratio sewage.
9. the sewage disposal system based on the simultaneous aerobic FBC technology that is coupled of biology, which is characterized in that including pretreatment unit, FBC
Processing unit, final deposition pool, advanced treatment of wastewater unit, sludge deep processing unit, the first dividing cell and the second dividing cell；
The advanced treatment of wastewater unit is connect with the final deposition pool；
The FBC processing unit includes sequentially connected one section of anaerobic pond, two sections of anaerobic ponds, anoxic pond and the aerobic pond FBC, described
One section of anaerobic pond is connect with the pretreatment unit；
First dividing cell respectively with the aerobic pond FBC, it is described disappear oxygen pond and the final deposition pool is connect, for will be described
Mixed liquor in the aerobic pond FBC carries out shunting processing；Second dividing cell respectively with the final deposition pool, anaerobic pond and sludge
Advanced treatment unit connection, for the sludge in the final deposition pool to be carried out shunting processing.
10. system according to claim 9, which is characterized in that the pretreatment unit include sequentially connected coarse rack,
Fine fack and waterpower revolve sand device, and the water outlet of the waterpower rotation sand device is connect with one section of anaerobic pond；And/or
The advanced treatment of wastewater unit includes sequentially connected depth-type filtration pond and contact chamber, the depth-type filtration pond with it is described
Final deposition pool connection.
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