CN206529383U - The sewage biological denitrifying device that a kind of reinforcing N2O is produced and recycled - Google Patents
The sewage biological denitrifying device that a kind of reinforcing N2O is produced and recycled Download PDFInfo
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- CN206529383U CN206529383U CN201720209457.2U CN201720209457U CN206529383U CN 206529383 U CN206529383 U CN 206529383U CN 201720209457 U CN201720209457 U CN 201720209457U CN 206529383 U CN206529383 U CN 206529383U
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Abstract
Strengthen N the utility model discloses one kind2The sewage biological denitrifying device that O is produced and recycled, short distance nitration pond is sequentially provided with along drainage flow direction, short-cut denitrification pond and mudpan, the sewage treated wherein in short distance nitration pond enters short-cut denitrification pond by the delivery port overflow of short distance nitration pond, mudpan is connected by connecting pipe with short-cut denitrification pond delivery port, the top in short distance nitration pond is provided with water inlet, short distance nitration pond agitator is provided with short distance nitration pond, aeration tube, heating rod, DO on-line monitoring systems and pH on-line monitoring systems, short-cut denitrification pond agitator is provided with short-cut denitrification pond, short-cut denitrification pond top is provided with dosing mouth, the top in short-cut denitrification pond is fixed with gas skirt by sealing flange, the gas skirt is provided with N2O collecting pipes.The utility model can reclaim N while ammonia nitrogen in sewage is removed2O is as the energy, and operating method is simple, and energy consumption is low, and nitric efficiency is high, N2O conversion ratios are higher.
Description
Technical field
The utility model belongs to technical field of biological sewage treatment, and in particular to one kind reinforcing N2O is produced and recycled
Sewage biological denitrifying device.
Background technology
N2O is a kind of Nontoxic propellant of great development prospect, is navigated as strong oxidizer and combustion-supporting machine agent available for space flight
The startup of empty field rocket engine and raising racing car dynamic speed.However, N2O is also that one kind heats potential energy with higher simultaneously
（It is approximately CO2265 times）Greenhouse gases, be considered as a kind of to have compared with overall situation negative effect in sewage disposal process
Accessory substance.Research shows, the N produced in annual sewage disposal process2O has reached global N2The 2.5%- of the total burst sizes of O
25%.At present, most of water treatment field research all concentrates on how to reduce N to greatest extent2O is produced, and strengthens N2O is produced simultaneously
It is collected as energy recovery using being a kind of ideamonger, also makes N2O becomes a kind of potential regenerative resource.
Reclaim what the energy reached generally by anaerobic digestion from sewage, organic matter is converted into CH4, then CH4With air
In O2Carry out combustion power generation as oxidant.In fact, N2O is that one kind compares O2More powerful oxidant, can improve CH4Burning
The energy of generation, uses N2O can avoid it as greenhouse gas emission to air as oxidant, and can improve CH simultaneously4's
Burning production capacity（Scherson Y D, Woo S G, Criddle C S. Environmental Science &
Technology, 2014, 48(10):5612-9）.However, N in current existing enhanced sewage processing procedure2The side that O is produced
Method has that sewage water denitrification is less efficient and N2The problems such as O conversion ratios are not high, makes this energy recovery approach be difficult in actual treatment
During apply.Utility model patent（CN201310357185.7）Strengthen N there is provided one kind2Device and controlling party that O is produced
Solubilised state N is realized in method, the endogenous denitrification effect occurred in anoxic section2O accumulation, then realize N by being aerated agitaion2O's
Reclaim, but NO2 -Percent reduction and N2O conversion ratios are relatively low.Utility model patent（CN201310743142.2）Utilize sludge-digestion liquid
The method of short distance nitration strengthens N2O generation, but its aeration phase high energy consumption, nitric efficiency are relatively low.
The content of the invention
The technical problem that the utility model is solved there is provided a kind of reinforcing N2The saprobia that O is produced and recycled takes off
Nitrogen device, N can be strengthened while high-efficiency biological denitrification is realized with higher conversion2O is produced and recycled, to processing nitrogen
The higher sewage of load has obvious advantage.The utility model is mainly comprising three steps：（1）Part aerobic nitrification effect will
NH4 +It is oxidized to NO2 -；（2）The different oxygen denitrification in part is by NO2 -It is reduced to N2O；（3）Collect N2O realizes the recovery of the energy.This
Utility model can reclaim N while ammonia nitrogen in sewage is removed2O is as the energy, and operating method is simple, and energy consumption is low, nitric efficiency
Height, N2O conversion ratios are higher.
The utility model adopts the following technical scheme that one kind strengthens N to solve above-mentioned technical problem2O is produced and is reclaimed profit
Process for bio-denitrifying sewage, it is characterised in that concretely comprise the following steps：Sewage enters short by the water inlet on short distance nitration pond top
Journey nitrification tank, the residence time in short distance nitration pond is that aeration tube is provided with inside 48h, short distance nitration pond, for controlling sewage
In dissolved oxygen concentration be 0.2-0.5mg/L, provided with DO on-line monitoring systems in short distance nitration pond, for monitoring short distance nitre at any time
Change and short distance nitration pond agitator is provided with the DO in pond, short distance nitration pond, the suspended state for keeping sludge, control stirring speed
Rate is that pH on-line monitoring systems are provided with 300r/min, short distance nitration pond, for monitoring the pH value of sewage in real time and by addition
The pH value of 0.5mol/L sulfuric acid solution regulation sewage, which is maintained, is provided with heating rod in 7.0-7.3, short distance nitration pond, for controlling
Sewage temperature is that the sewage in 35 DEG C, short distance nitration pond enters short-cut denitrification pond by the delivery port overflow of short distance nitration pond；It is dirty
Residence time of the water in short-cut denitrification pond is that short-cut denitrification pond agitator is provided with 24h, short-cut denitrification pond, and control is stirred
Speed is mixed for 150r/min, short-cut denitrification pond top is provided with dosing mouth, for being to exist in the reaction time at short-cut denitrification initial stage
Acetic acid is added during 0-1h as carbon source so that the C/N controls in sewage are 3, short-cut denitrification pond top is provided with gas skirt, the collection
Gas hood top is provided with N2O collecting pipes, the N produced for collecting in sewage disposal process2O gases, treated sewage passes through short distance
Denitrification pond delivery port enters mudpan；Residence time of the sewage in mudpan is 0.5-1h, mudpan
Middle oettIed sewage is sunk by being discharged after mudpan downflow weir overflow through mudpan delivery port in mudpan
Excess sludge behind shallow lake is discharged by mudpan mud discharging mouth.
Reinforcing N described in the utility model2The sewage biological denitrifying device that O is produced and recycled, it is characterised in that edge
Drainage flow direction is sequentially provided with short distance nitration pond, short-cut denitrification pond and mudpan, is handled wherein in short distance nitration pond
The sewage crossed enters short-cut denitrification pond by the delivery port overflow of short distance nitration pond, and mudpan passes through connecting pipe and short distance
Denitrification pond delivery port is connected, and the top in short distance nitration pond is provided with water inlet, short distance nitration pond provided with the stirring of short distance nitration pond
Device, aeration tube, heating rod, DO on-line monitoring systems and pH on-line monitoring systems, aeration tube are connected by pipeline with air pump, short distance
In denitrification pond be provided with short-cut denitrification pond agitator, short-cut denitrification pond top be provided with dosing mouth, short-cut denitrification pond it is upper
Portion is fixed with gas skirt by sealing flange, and the gas skirt is provided with N2O collecting pipes, the top of mudpan is provided with overflow
Weir, the top of the downflow weir is mudpan delivery port, and the bottom of mudpan is provided with mudpan mud discharging mouth.
The utility model has the advantages that compared with prior art：
1st, operating cost is low, and excess sludge yield is less, non-secondary pollution；
2nd, greenhouse gases N is realized2O recycling；
3rd, there is advantage to the sewage for handling the low C/N of high load capacity, N while realizing high-efficiency biological denitrification2O conversion ratios compared with
It is high.
Brief description of the drawings
Fig. 1 is to strengthen N in the utility model2The structural representation for the sewage biological denitrifying device that O is produced and recycled.
In figure：1- water inlets；2- short distance nitrations pond；3- short distance nitrations pond agitator；4- short distance nitrations pond delivery port；5- exposes
Tracheae；6-DO on-line monitoring systems；7-pH on-line monitoring systems；8- heating rods；9- air pumps；10- short-cut denitrifications pond；11- is short
Journey denitrification pond agitator；12- gas skirts；13- sealing flanges；14- dosing mouths；15-N2O collecting pipes；16- short-cut denitrifications pond
Delivery port；17- mudpans；18- downflow weirs；19- mudpan delivery ports；20- mudpan mud discharging mouths.
Embodiment
With reference to the drawings and specific embodiments, the utility model is described in further detail：
As shown in figure 1, a kind of reinforcing N2The sewage biological denitrifying device that O is produced and recycled, along drainage flow direction
Short distance nitration pond 2, short-cut denitrification pond 10 and mudpan 17 are sequentially provided with, the dirt treated wherein in short distance nitration pond 2
Water enters short-cut denitrification pond 10 by the overflow of short distance nitration pond delivery port 4, and mudpan 17 passes through connecting pipe and short distance
Denitrification pond delivery port 16 is connected, and the top in short distance nitration pond 2, which is provided with water inlet 1, short distance nitration pond 2, is provided with short distance nitration pond
Agitator 3, aeration tube 5, heating rod 8, DO on-line monitoring systems 6 and pH on-line monitoring systems 7, aeration tube 5 pass through pipeline and gas
Pump 9 is connected, and short-cut denitrification pond agitator 11 is provided with short-cut denitrification pond 10, the top of short distance nitration short-cut denitrification pond 10 is set
There is dosing mouth 14, the top in short-cut denitrification pond 10 is fixed with gas skirt 12 by sealing flange 13, and the gas skirt 12 is provided with
N2O collecting pipes 15, the top of mudpan 17 is provided with downflow weir 18, and the top of the downflow weir 18 is mudpan delivery port
19, the bottom of mudpan 17 is provided with mudpan mud discharging mouth 20.
Sewage enters short distance nitration pond 2, sewage stopping in short distance nitration pond 2 by the water inlet 1 on the top of short distance nitration pond 2
It is that aeration tube 5 is provided with 48h, short distance nitration pond 2 to stay the time, is 0.2-0.5mg/L for controlling dissolved oxygen concentration in sewage, short
DO on-line monitoring systems 6 are provided with journey nitrification tank 2, are provided with for monitoring at any time in the DO in short distance nitration pond, short distance nitration pond 2
Short distance nitration pond agitator 3, the suspended state for keeping sludge, it is in 300r/min, short distance nitration pond 2 to control stir speed (S.S.)
Provided with pH on-line monitoring systems 7, adjusted for monitoring at any time using 0.5mol/L sulfuric acid solution during pH value, short distance nitration
Section pH maintains 7.1 or so, and this neutral pH is conducive to the growth of nitrobacteria, improves and is set in rate of nitrification, short distance nitration pond 2
There is heating rod 8, for controlling temperature to be 35 DEG C, above-mentioned set reaction condition is conducive to provide suitable microbiological condition, maximum
That changes realizes NH4 +To NO2 -Conversion, the sewage in short distance nitration pond 2 enters short distance by the overflow of short distance nitration pond delivery port 4
Denitrification pond 10, the process only leans on Action of Gravity Field, does not produce additional energy；Residence time of the sewage in short-cut denitrification pond 10
For 24h, short-cut denitrification pond 10 is interior to be provided with short-cut denitrification pond agitator 11, and it is 150r/min to control stir speed (S.S.), and short distance is anti-
The top of nitrification tank 10 is provided with dosing mouth 14, short-cut denitrification initial stage（0-1h）Acetic acid is added as carbon source, microorganism utilizes acetic acid
Intracellular polymer PHB is synthesized, these PHB are the NO that contains in the water outlet of short distance nitration pond 22 -Electronics is provided and carries out short-cut denitrification work
With the NO in short-cut denitrification effect2 -PHB is aoxidized, can be suppressed using the extracellular microbial internal carbon source PHB denitrifications carried out
N2NO in the activity of O reductases, maximized promotion water body2 -It is converted into N2O, while also been removed the NO in water2 -- N, reduction
TN concentration in water body, adding acetic acid amount makes the C/N in sewage control to be 3, and sewage C/N is too high, acetic acid can not be completely used for
Acetic acid remaining in intracellular polymer PHB, water body is synthesized by heterotrophic denitrifier using occurring redox, is promoted
Nitrogen is thoroughly reduced to N in denitrification process in sewage2, it is unfavorable for N2O recovery, sewage C/N is too low, can reduce system
Middle extracellular microbial interpolymer PHB synthetic quantity, causes electron donor in denitrification process not enough, the NO in sewage2 -Can not be by
Restore All and remain in water, in turn result in TN clearances and N in system2O conversion ratios are reduced, the top of short-cut denitrification pond 10
Provided with gas skirt 12, the top of gas skirt 12 is provided with N2O collecting pipes 15 are used to collect the N produced in sewage disposal process2O gases, place
The sewage managed enters mudpan 17 by short-cut denitrification pond delivery port 16, and the process is only leaned on Action of Gravity Field, do not produced
Additional energy；Residence time of the sewage in mudpan 17 is 0.5-1h, and oettIed sewage leads in mudpan 17
Discharged after crossing the overflow of mudpan downflow weir 18 through mudpan delivery port 19, the process only leans on gravity flowing, does not produce
Excess sludge after being precipitated in additional energy, mudpan 17 is discharged by mudpan mud discharging mouth 20.
Embodiment 1
By taking the anaerobic digestion solution of certain sewage treatment plant as an example, wastewater influent water quality is：COD concentration is 1200mg/L, NH4 +-N
Concentration is 1400mg/L, and TP concentration is 46mg/L, and pH is 8.7 or so, and selected short distance nitration pond dischargeable capacity is 12L, short
Journey denitrification pool volume is 6L, and reactor seed sludge uses sewage treatment plant's short distance nitration pond fresh activity sludge, reactor
Interior sludge concentration maintains 2500-3000mg/L, and sludge sludge age maintains 22d, and short distance nitration pond DO maintains 0.2-0.5mg/
L。
Concrete operation step is as follows：
（1）Device starts：Sewage treatment plant's short distance nitration pond fresh activity sludge input short distance nitration of inoculation is taken first
Pond, sludge concentration is 3000-4000mg/L；
（2）Sewage enters short distance nitration pond by water inlet, is adjusted using 0.5mol/L sulfuric acid solution during short distance nitration
PH is saved, it is 7.1 to control pH, and Dissolved Oxygen concentration Control 0.2-0.5mg/L, reaction temperature is controlled at 35 DEG C using heating rod；
（3）Contain NO by what short distance nitration pond was treated2 -（About 1300 mg/L）Sewage enter short-cut denitrification pond
In, denitrification adds acetic acid solution initial stage（122mM）It is 3 to control C/N, and acetic acid synthesis PHB is NO2 -Electronics is provided and carries out denitrification
Effect.
Result of the test shows, after system run all right during short distance nitration in sewage about 93% NH4 +It is converted into NO2 -,
Denitrification terminate after about 77% NO2 -It is converted into N2O, COD clearance reach that 92%, TN clearances reach 91%, are realizing that sewage is de-
N is realized while nitrogen efficiency2O recycling.
Embodiment 2
By taking kitchen sewage as an example, wastewater influent water quality is：COD concentration 460mg/L, NH4 +- N concentration 500mg/L, TP concentration
For 12mg/L, pH is 8.3 or so, and selected short distance nitration pond dischargeable capacity is 20L, and short-cut denitrification pool volume is 10L, instead
Device seed sludge is answered to use sludge concentration in sewage treatment plant's short distance nitration pond fresh activity sludge, reactor to maintain 3000-
4000mg/L, sludge sludge age maintains 20d, and short distance nitration pond DO maintains 0.2-0.5mg/L.
Concrete operation step is as follows：
（1）Device starts：Sewage treatment plant's short distance nitration pond fresh activity sludge input short distance nitration of inoculation is taken first
Pond, sludge concentration is 3000-3500mg/L；
（2）Sewage enters short distance nitration pond by water inlet, is adjusted using 0.5mol/L sulfuric acid solution during short distance nitration
PH is saved, it is 7.1 to control pH, and Dissolved Oxygen concentration Control 0.2-0.5mg/L, reaction temperature is controlled at 35 DEG C or so using heating rod；
（3）Contain NO by what short distance nitration pond was treated2 -（About 470 mg/L）Sewage enter short-cut denitrification pond in,
Denitrification adds acetic acid solution initial stage（122mM）It is 3 to control C/N, and acetic acid synthesis PHB is NO2 -Electronics is provided and carries out denitrification work
With.
Result of the test shows, after system run all right during short distance nitration in sewage about 95% NH4 +It is converted into NO2 -,
Denitrification terminate after about 76% NO2 -It is converted into N2O, COD clearance reach that 87%, TN clearances reach 92%, are realizing that sewage is de-
N is enhanced while nitrogen efficiency2O generation and recovery.
Embodiment above describes general principle of the present utility model, principal character and advantage, the technical staff of the industry
It should be appreciated that the utility model is not restricted to the described embodiments, the simply explanation described in above-described embodiment and specification is originally
The principle of utility model, in the case where not departing from the scope of the utility model principle, the utility model also has various changes and modifications,
These changes and improvements are each fallen within the range of the utility model protection.
Claims (1)
1. one kind reinforcing N2The sewage biological denitrifying device that O is produced and recycled, it is characterised in that along drainage flow direction successively
Provided with short distance nitration pond, short-cut denitrification pond and mudpan, the sewage treated wherein in short distance nitration pond passes through short distance
The overflow of nitrification tank delivery port enters short-cut denitrification pond, and mudpan passes through connecting pipe and short-cut denitrification pond delivery port phase
Even, the top in short distance nitration pond be provided with water inlet, short distance nitration pond be provided with short distance nitration pond agitator, aeration tube, heating rod,
DO on-line monitoring systems and pH on-line monitoring systems, aeration tube are connected by pipeline with air pump, provided with short in short-cut denitrification pond
Journey denitrification pond agitator, short-cut denitrification pond top is provided with dosing mouth, and the top in short-cut denitrification pond is solid by sealing flange
Surely there is gas skirt, the gas skirt is provided with N2O collecting pipes, the top of mudpan is provided with downflow weir, the top of the downflow weir
For mudpan delivery port, the bottom of mudpan is provided with mudpan mud discharging mouth.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720209457.2U CN206529383U (en) | 2017-03-06 | 2017-03-06 | The sewage biological denitrifying device that a kind of reinforcing N2O is produced and recycled |
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| CN201720209457.2U CN206529383U (en) | 2017-03-06 | 2017-03-06 | The sewage biological denitrifying device that a kind of reinforcing N2O is produced and recycled |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106673378A (en) * | 2017-03-06 | 2017-05-17 | 河南师范大学 | Biological sewage denitrification method and device capable of enhancing N2O generation and recycling |
| CN107954515A (en) * | 2017-11-08 | 2018-04-24 | 河南师范大学 | The combination unit and its operation method of a kind of sewage purification, Treatment of Sludge and energy recovery |
| CN108008083A (en) * | 2017-12-22 | 2018-05-08 | 南京工业大学 | Li-ion batteries piles thermal runaway autoalarm and its monitoring method based on gas-monitoring |
-
2017
- 2017-03-06 CN CN201720209457.2U patent/CN206529383U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106673378A (en) * | 2017-03-06 | 2017-05-17 | 河南师范大学 | Biological sewage denitrification method and device capable of enhancing N2O generation and recycling |
| CN107954515A (en) * | 2017-11-08 | 2018-04-24 | 河南师范大学 | The combination unit and its operation method of a kind of sewage purification, Treatment of Sludge and energy recovery |
| CN108008083A (en) * | 2017-12-22 | 2018-05-08 | 南京工业大学 | Li-ion batteries piles thermal runaway autoalarm and its monitoring method based on gas-monitoring |
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