CN106277570A - A kind of sewage disposal and N2the coupling device of O reduction of discharging and operation method thereof - Google Patents

A kind of sewage disposal and N2the coupling device of O reduction of discharging and operation method thereof Download PDF

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Publication number
CN106277570A
CN106277570A CN201610650607.3A CN201610650607A CN106277570A CN 106277570 A CN106277570 A CN 106277570A CN 201610650607 A CN201610650607 A CN 201610650607A CN 106277570 A CN106277570 A CN 106277570A
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China
Prior art keywords
treatment pond
pond
sewage
anoxic
mudpan
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CN201610650607.3A
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Chinese (zh)
Inventor
闫旭
郭东丽
邱德志
齐星昊
闫广轩
孙剑辉
苏现伐
冯精兰
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Henan Normal University
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Henan Normal University
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Priority to CN201610650607.3A priority Critical patent/CN106277570A/en
Publication of CN106277570A publication Critical patent/CN106277570A/en
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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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/402—Dinitrogen oxide
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • 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
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • 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
    • 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
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)

Abstract

The invention discloses a kind of sewage disposal and N2The coupling device of O reduction of discharging and operation method thereof, the water outlet of anoxic treatment pond enters Aerobic Process for Treatment pond by anoxic treatment pond outlet, the water outlet of Aerobic Process for Treatment pond enters mudpan by Aerobic Process for Treatment pond outlet, the waste gas that gas skirt is collected is sent in packed absorber by gas skirt gas outlet, in Aerobic Process for Treatment pond, a part of sewage is sent in packed absorber by circulating pump, the packed absorber outlet of packed absorber is connected with anoxic treatment pond, and anoxic treatment pond and mudpan are connected by sludge reflux pump.The invention also discloses this sewage disposal and N2The carrying out practically method of the coupling device that O reduces discharging.Present device is simple, and operating cost is low, does not produce secondary pollution, can realize N during bio-denitrifying sewage while keeping wastewater treatment efficiency2The significantly reduction of discharging of O.

Description

A kind of sewage disposal and N2The coupling device of O reduction of discharging and operation method thereof
Technical field
The invention belongs to sewage disposal and field of environment protection, be specifically related to a kind of sewage disposal and N2The coupling that O reduces discharging Device and operation method thereof.
Background technology
Bio-denitrifying sewage dephosphorization process is widely used in municipal sewage plant, is mainly used in removing the nitrogen in sewage Phosphor contaminant, to control the eutrophication of water body.Biological denitrification process includes: (1) Nitrification, i.e. nitrifier is by sewage Mineralized nitrogen is nitrate；(2) Denitrification, i.e. denitrifying bacterium utilize Organic substance as denitrifying carbon source by nitrate reduction For N2, thus reach the purpose removed from sewage by nitrogen.
Nitrous oxide (N2O) being one of the whole world 3 main greenhouse gases, it heats potential energy and respectively may be about CO2310 times, CH44-30 times.The N of more than 90% in air2O derives from biological nitrogen cyclic process, and wherein bio-denitrifying sewage is N2One of O Important generation source, the N of annual discharge2O amount is about (0.13-3.00) × 1012Kg, accounts for whole world N2The 21.5%-of O total release 25.0%, and have the trend day by day increased.N2O is the product of biological nitration and denitrification process, can not keep away in biological denitrification process N can be discharged with exempting from2O gas.Therefore, how while ensureing bio-denitrifying sewage effect, N is realized2The reduction of discharging of O is whole world sewage The important problem that treatment plant faces.
Summary of the invention
Present invention solves the technical problem that and there is provided a kind of sewage disposal and N2The coupling device of O reduction of discharging and operation side thereof Method, the water treatment technology main body of this combination unit is the biological denitrification process that sewage disposal is conventional: anoxia/aerobic (AO), anaerobism/ Anoxia/aerobic (A2O) etc.；N2The reduction of discharging of O includes two parts, and one is by the N produced during gas skirt collection sewage water denitrification2O gas Body, is transferred into packed absorber and utilizes gas-liquid mass transfer by gas N2The incoming liquid phase of O；Two is will to have dissolved N2The sewage transport of O arrives Anoxic pond, by the Denitrification in anoxic pond by the N of the dissolved2O is reduced to N2, the absorption water used by this process is aerobic Pond and the interior circulating sewage of anoxic pond, in realizing sewage treatment process while circulation, this part of contaminated water is by water treatment procedure The N produced2O absorbs and is transported to anoxic pond, by N under Denitrification2O is reduced to N2, reached N2The purpose that O reduces discharging, real Existing " water is dual-purpose ", it is to avoid increase extra operating cost.
The present invention solves that above-mentioned technical problem adopts the following technical scheme that, a kind of sewage disposal and N2The coupling that O reduces discharging Device, it is characterised in that include anoxic treatment pond, Aerobic Process for Treatment pond, mudpan and packed absorber, on anoxic treatment pond The anoxic treatment pond water inlet in portion is connected with sewage vent line, is provided with anoxic pond agitator, anoxic treatment in anoxic treatment pond Pond water outlet enters Aerobic Process for Treatment pond by anoxic treatment pond outlet overflow, and the bottom in Aerobic Process for Treatment pond is provided with and is connected with air pump Aeration tube, the Aerobic Process for Treatment pond outlet on top, Aerobic Process for Treatment pond is connected with mudpan by pipeline, mudpan Top is provided with downflow weir and mudpan outlet, and the bottom of mudpan is provided with mudpan mud discharging mouth, and mud sinks Pond, shallow lake is connected with anoxic treatment pond by sludge reflux pump and pipeline, anoxic treatment pond and Aerobic Process for Treatment pond be arranged over closing Gas skirt, the gas skirt gas outlet on this gas skirt top packed absorber air inlet by pipeline and packed absorber bottom Connecting, the packed absorber water inlet of packing material absorbing top of tower is connected with Aerobic Process for Treatment pond by circulating pump and pipeline, and filler is inhaled The packed absorber outlet receiving tower bottom is connected with anoxic treatment pond by pipeline, and the inside of packed absorber is provided with spray system System, packing support plate and packing layer, wherein spray system is arranged at the top of packed absorber, and packing layer passes through packing support plate Being fixed on the middle part of packed absorber, the filler of this packing layer is polyethylene Pall ring, and the top of packed absorber is provided with filler Absorption tower air vent.
Sewage disposal of the present invention and N2The operation method of the coupling device that O reduces discharging, it is characterised in that concrete steps For: sewage enters anoxic treatment pond by the anoxic treatment pond water inlet on top, anoxic treatment pond, and sewage is in anoxic treatment pond The time of staying be 1.5-2h, anoxic treatment pond is provided with anoxic pond agitator for keeping mud in sewage-treatment plant to be in The state suspended, stir speed (S.S.) is 500r/min；The sewage processed in anoxic treatment pond is overflow by anoxic treatment pond outlet Stream enters Aerobic Process for Treatment pond, and the sewage time of staying in Aerobic Process for Treatment pond is 6-8h, and the bottom in Aerobic Process for Treatment pond is provided with and gas The aeration tube that pump is connected, air pump carries out aeration for maintaining muddy water in Aerobic Process for Treatment pond to mix by aeration tube in Aerobic Process for Treatment pond The dissolved oxygen concentration of compound, Dissolved Oxygen concentration Control is at 1.5-3mg/L；The sewage processed in Aerobic Process for Treatment pond passes through aerobic place Reason pond outlet overflow enters mudpan, and the sewage time of staying in mudpan is 1-2h, in mudpan OettIed sewage is by discharging through mudpan outlet after mudpan downflow weir overflow, heavy in mudpan Sludge part behind shallow lake is back to anoxic treatment pond for keeping enough microorganism concn by sludge reflux pump, return sludge ratio For 100%-200%, excess sludge is then discharged by mudpan mud discharging mouth；Sewage in packed absorber passes through packed absorber Outlet enters anoxic treatment pond, and this process achieves anoxia and the backflow of internal reflux liquid circulation in Aerobic, simultaneously Recirculated water, also as the absorbent of packed tower, absorbs the N produced in the sewage disposal process collected by gas skirt2O, interior circulation The nitrate that nitrifying process in Aerobic Process for Treatment pond produces is transported to anoxic treatment pond by circulating pump and carries out denitrification by liquid again, with Time also absorb the N in gas2O, the N of the dissolved2O enters anoxic treatment pond along with interior circulation fluid, under Denitrification, molten Solve state N2O is reduced to N2, drastically reduce the area sewage disposal process N2The discharge capacity of O.
The present invention compared with prior art has the advantages that
1, equipment is simple, and operating cost is low, does not produce secondary pollution；
2, N during bio-denitrifying sewage can be realized while keeping wastewater treatment efficiency2The significantly reduction of discharging of O；
3, applied range, can be applicable to anoxia/aerobic process (AO), anaerobic/anoxic aerobic process (A2O), oxidation ditch etc. existing Common sewage treatment process；
When 4, existing sewage treatment process being transformed, only need to set up packed absorber and gas skirt, simple, operability By force.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
In figure: the water inlet of 1-anoxic treatment pond；2-anoxic treatment pond；3-anoxic pond agitator；The pond water outlet of 4-anoxic treatment Mouthful；5-Aerobic Process for Treatment pond；6-aeration tube；7-Aerobic Process for Treatment pond outlet；8-air pump；9-mudpan；10-downflow weir, 11- Mudpan outlet；12-mudpan mud discharging mouth；13-sludge reflux pump；14-packed absorber；15-gas skirt； 16-packed absorber air inlet；17-gas skirt gas outlet；18-circulating pump；19-sealing flange；20-packed absorber is intake Mouthful；21-spray system；22-packing support plate；23-packing layer；24-packed absorber air vent；25-packed absorber water outlet Mouthful.
Detailed description of the invention
The particular content of the present invention is described in detail in conjunction with accompanying drawing.As it is shown in figure 1, a kind of sewage disposal and N2The coupling that O reduces discharging Locking device, including anoxic treatment pond 2, Aerobic Process for Treatment pond 5, packed absorber 14 and mudpan 9, concrete connected mode is: Anoxic treatment pond 2 water outlet enters Aerobic Process for Treatment pond 5 by anoxic treatment pond outlet 4, and aerobic place is passed through in Aerobic Process for Treatment pond 5 water outlet Reason pond outlet 7 enters mudpan 9, and the waste gas that gas skirt 15 is collected is sent into packed absorber 14 by gas skirt gas outlet 17 In, in Aerobic Process for Treatment pond 5, a part of sewage is sent in packed absorber 14 by circulating pump 18, the packing material absorbing of packed absorber 14 Tower outlet 25 is connected with anoxic treatment pond 2, and anoxic treatment pond 2 and mudpan 9 are connected by sludge reflux pump 13.
Processing sewage and enter anoxic treatment pond 2 by the anoxic treatment pond water inlet 1 on top, anoxic treatment pond 2, sewage exists The time of staying in anoxic treatment pond 2 is 1.5-2h, and the sewage processed in anoxic treatment pond 2 passes through anoxic treatment pond outlet 4 overflows enter Aerobic Process for Treatment pond 5, and this process only relies on gravity flowing, does not produce additional energy；Sewage is in Aerobic Process for Treatment pond 5 The time of staying be 6-8h, the sewage processed in Aerobic Process for Treatment pond 5 enters mud by Aerobic Process for Treatment pond outlet 7 overflow and sinks Pond, shallow lake 9, this process only relies on gravity flowing, does not produce additional energy；The sewage time of staying in mudpan 9 is 1- 2h, through mudpan outlet 11 after in mudpan 9, oettIed sewage passes through mudpan downflow weir 10 overflow Discharging, this process only flows by gravity, does not produce additional energy, and the sludge part after precipitation in mudpan 9 is by mud Reflux pump 13 is back to anoxic treatment pond 2, and return sludge ratio is 100%-200%, is used for keeping enough microorganism concns, residue Mud is then discharged by mudpan mud discharging mouth 12.
Anoxic treatment pond 2 is provided with anoxic pond agitator 3 to keep the suspended state of mud in sewage-treatment plant, stirring Speed is about 500r/min；Being provided with aeration tube 6 in Aerobic Process for Treatment pond 5, air pump 8 is connected with aeration tube 6, during plant running, and air pump 8 In Aerobic Process for Treatment pond 5, aeration is carried out by aeration tube 6, to maintain the dissolved oxygen concentration of mud mixture in Aerobic Process for Treatment pond 5, Dissolved Oxygen concentration Control is at 1.5-3mg/L；Sewage in packed absorber 14 enters anoxia by packed absorber outlet 25 Processing pond 2, this process not only achieves anoxia and the backflow of internal reflux liquid circulation in Aerobic, and recirculated water is also made simultaneously For the absorbent of packed absorber, absorb the N produced in the sewage disposal process collected by gas skirt 152O a, it is achieved " water Dual-purpose ", and do not increase extra operating cost.Nitrifying process in Aerobic Process for Treatment pond 5 is being produced by interior circulation fluid by circulating pump 18 Raw nitrate is transported to anoxic treatment pond 2 and carries out denitrification, the most also absorbs the N in gas2O, the N of the dissolved2O along with Interior circulation fluid enters anoxic treatment pond 2, under Denitrification, the dissolved N2O is reduced to N2, thus drastically reduce the area dirt Water treatment procedure N2The discharge capacity of O.
This device is provided with packed absorber 14, for interior circulation fluid, sewage disposal process is discharged N2The absorption of O, filler is inhaled Receiving tower 14 tower body material is PVC, and in tower body, filler uses polyethylene Pall ring, and this filler has that flux is big, resistance is little, separates effect The advantages such as rate is high and operating flexibility is big, and with low cost, it is suitable for extensive sewage disposal process and uses；It addition, this filler Circulation fluid being uniformly distributed in packed tower in being conducive to, increases water body and the contact area of gas, effectively facilitates water body turbulent flow State reduces laminar flow state, thus strengthens interior circulation fluid and N2Gas-liquid mass transfer efficiency between O；Described packed absorber 14 is internal Being provided with spray system 21, packing support plate 22 and packing layer 23, spray system can promote uniform point in filler of interior circulation fluid Cloth, increases gas liquid interfacial area, strengthens the turbulent condition of liquid, thus strengthens N2O absorption efficiency；Anoxic treatment pond 2 and aerobic Process top, pond 5 is provided with gas skirt 15 and collects waste gas, and described gas skirt 15 is prismatoid, and bottom is uncovered, top seal, and top sets Gas skirt gas outlet 17, bottom and anaerobic-aerobic is had to process top, pond and be tightly connected by sealing flange 19；Gas skirt 15 is received The waste gas of collection is containing N2The mixed gas of O, gas skirt gas outlet 17 is connected with packed absorber air inlet 16, and gas is aerobic District's aeration process enters under aerodynamic force effect gas skirt 15 and enters packed absorber 14, nothing by gas skirt gas outlet 17 The air pump transmission for gas need to be set, it is to avoid system runs the increase of extra charge；Sewage in Aerobic Process for Treatment pond 5 is by circulating Pump 18 pumps into packed absorber 14, enters packed absorber by the packed absorber water inlet 20 on packed absorber 14 top 14, sewage inverted draft is sprayed by spray system 21, beneficially N2Being fully contacted of O and interior circulation fluid, increases absorption efficiency；In The consumption of circulation fluid may utilize circulating pump 18 and is adjusted, by controlling liquid rate, adjust the overall running status of system and To N2The absorption of O, to improve N2The dissolution rate of O；Sewage is by the packed absorber outlet 25 bottom packed absorber 14 subsequently Entering anoxic treatment pond 2, this process relies primarily on action of gravity, it is not necessary to extra operating cost；In anoxic treatment pond 2, dissolve The N of state2O utilizes organic carbon source present in sewage to carry out anoxic denitrification reaction, is finally reduced to N2, packed absorber 14 Remaining waste gas interior is discharged by the packed absorber air vent 24 on packed absorber 14 top.
Embodiment 1
As a example by the sanitary sewage that certain community is discharged, wastewater influent water quality is: COD concentration 400mg/L, NH4 +-N concentration 45mg/ L, TN concentration 50mg/L, sewage load is 80L/d, and reactor seed sludge uses sewage treatment plant's Aerobic Process for Treatment pond the most fresh and alive Property mud, in reactor, sludge concentration maintains 2500-3000mg/L, Aerobic Process for Treatment pond DO and maintains 1.5-2mg/L, mud mud Age maintains 12d.
(1) sewage disposal: sewage water outlet main pollutant consistence after anoxic treatment pond and Aerobic Process for Treatment pond process and Clearance is as shown in table 1, and water outlet reaches urban wastewater treatment one-level B standard.
(2) Treatment of Sludge: the treated mud mixture in Aerobic Process for Treatment pond is entered by Aerobic Process for Treatment pond outlet Mudpan, the mud part after precipitation 1-2h is back to anoxic treatment pond to keep anoxic treatment pond by sludge reflux pump In sludge concentration, remaining mud as residue discharged by mudpan mud discharging mouth, through precipitation after supernatant pass through The discharge outlet on sedimentation tank top is discharged.
(3) collection and confinement of gases: the N of loss during anoxic treatment pond and Aerobic Process for Treatment pond process sewage2O and other gas groups The mixed gas become enters gas skirt under the aeration process aerodynamic force effect of Aerobic Process for Treatment pond, enters filler by gas skirt and inhales Receive tower.
(4) N2The gas-liquid mass transfer of O gas and reduction: in gas skirt containing N2The mixed gas of O first passes through packing material absorbing Tower bottom air inlet enters packed absorber, and the sewage in Aerobic Process for Treatment pond is defeated by the water inlet on the top of packed absorber simultaneously Enter and uniformly spray into through spray system uniformly to dispense on filler, major part N2O gas is dissolved in water, and sewage enters scarce subsequently Oxygen processes pond, on the one hand can be that anoxic treatment pond provides denitrification substrate nitrate, the N on the other hand dissolved2O is anti-by anoxia Nitrification is reduced to N2。
The N of release in sewage disposal process2Before and after O processes, concentration is as shown in table 2, after the application implementation of this device, and N2O releases High-volume decrease 93%, it is to avoid a large amount of N2O is directly released in air.
Main pollutant consistence change and clearance (mg/L) before and after table 1 sewage disposal
COD NH4 +-N TN
Water outlet 35 mg/L 5 mg/L 12 mg/L
Clearance 91% 89% 76%
Table 2 N2Concentration change (ppm) before and after O process
Gas in gas skirt Packed absorber is given vent to anger
N2O concentration 67 4.7
Embodiment 2
Processing as a example by sewage by certain sewage treatment plant, wastewater influent water quality is: COD concentration 470mg/L, NH4 +-N concentration 53mg/ L, TN concentration 58mg/L, sewage load is 80L/d, and reactor seed sludge uses sewage treatment plant's Aerobic Process for Treatment pond the most fresh and alive Property mud, in reactor, sludge concentration maintains 3500-4000 mg/L, Aerobic Process for Treatment pond DO and maintains 1.5-2mg/L, mud Mud maintains 15d age.
Device starts, and water outlet main pollutant consistence and clearance after treatment are as shown in table 3, and it is dirty that water outlet reaches cities and towns Water processes one-level B standard；The N of release in sewage disposal process2Before and after O processes, concentration is as shown in table 4, through the application implementation of this device After, N2O burst size decreases 94%, it is to avoid a large amount of N2O is directly released in air.
Main pollutant consistence change and clearance (mg/L) before and after table 3 sewage disposal
COD NH4 +-N TN
Water outlet 30 mg/L 6mg/L 8 mg/L
Clearance 94% 87% 86%
Table 4 N2Concentration change (ppm) before and after O process
Gas in gas skirt Packed absorber is given vent to anger
N2O concentration 84 5.1
This device is N during reducing bio-denitrifying sewage2O gas ensure that sewage treating efficiency while discharging in a large number, with Time do not increase extra operating cost, simple to operate, non-secondary pollution.The present invention transforms for various common biological denitrification process Simple, only need to set up packed absorber.Along with China's economic development and the raising of the level of urbanization, sanitary sewage disposal amount Constantly increase, N2O emission problem is the most serious, and the present invention is for alleviating N2The environment negative effect that O brings has actively work With.
The ultimate principle of the present invention, principal character and advantage have more than been shown and described, without departing from the present invention spirit and On the premise of scope, the present invention also has various changes and modifications, and these changes and improvements both fall within claimed invention Scope.

Claims (2)

1. a sewage disposal and N2The coupling device that O reduces discharging, it is characterised in that include anoxic treatment pond, Aerobic Process for Treatment pond, mud Sedimentation tank and packed absorber, the anoxic treatment pond water inlet on top, anoxic treatment pond is connected with sewage vent line, at anoxia Reason is provided with anoxic pond agitator in pond, and the water outlet of anoxic treatment pond enters Aerobic Process for Treatment pond by the outlet overflow of anoxic treatment pond, The bottom in Aerobic Process for Treatment pond is provided with the aeration tube being connected with air pump, and the Aerobic Process for Treatment pond outlet on top, Aerobic Process for Treatment pond is by pipe Road is connected with mudpan, and the top of mudpan is provided with downflow weir and mudpan outlet, mudpan Bottom is provided with mudpan mud discharging mouth, and mudpan is connected with anoxic treatment pond by sludge reflux pump and pipeline, anoxia Process the gas skirt being arranged over closing in pond and Aerobic Process for Treatment pond, the gas skirt gas outlet on this gas skirt top by pipeline with The packed absorber air inlet of packed absorber bottom connects, and the packed absorber water inlet of packing material absorbing top of tower is by circulation Pump and pipeline are connected with Aerobic Process for Treatment pond, and the packed absorber outlet of packing material absorbing tower bottom is by pipeline and anoxic treatment pond Connecting, the inside of packed absorber is provided with spray system, packing support plate and packing layer, and wherein spray system is arranged at filler suction Receiving the top of tower, packing layer is fixed on the middle part of packed absorber by packing support plate, and the filler of this packing layer is polyethylene Pall ring, the top of packed absorber is provided with packed absorber air vent.
2. the sewage disposal described in a claim 1 and N2The operation method of the coupling device that O reduces discharging, it is characterised in that concrete Step is: sewage enters anoxic treatment pond by the anoxic treatment pond water inlet on top, anoxic treatment pond, and sewage is in anoxic treatment The time of staying in pond is 1.5-2h, is provided with anoxic pond agitator for keeping mud in sewage-treatment plant in anoxic treatment pond Being in the state of suspension, stir speed (S.S.) is 500r/min；The sewage processed in anoxic treatment pond passes through the water outlet of anoxic treatment pond Mouth overflow enters Aerobic Process for Treatment pond, and the sewage time of staying in Aerobic Process for Treatment pond is 6-8h, and the bottom in Aerobic Process for Treatment pond is provided with The aeration tube being connected with air pump, air pump carries out aeration for maintaining mud in Aerobic Process for Treatment pond by aeration tube in Aerobic Process for Treatment pond The dissolved oxygen concentration of aqueous mixtures, Dissolved Oxygen concentration Control is at 1.5-3mg/L；The sewage processed in Aerobic Process for Treatment pond passes through Oxygen processes pond outlet overflow and enters mudpan, and the sewage time of staying in mudpan is 1-2h, sludge settling In pond, oettIed sewage is by discharging through mudpan outlet after mudpan downflow weir overflow, through mudpan Sludge part after middle precipitation is back to anoxic treatment pond for keeping enough microorganism concn by sludge reflux pump, and mud returns Flow ratio is 100%-200%, and excess sludge is then discharged by mudpan mud discharging mouth；Sewage in packed absorber is inhaled by filler Receiving tower outlet and enter anoxic treatment pond, this process achieves anoxia and the backflow of internal reflux liquid circulation in Aerobic, Recirculated water is also as the absorbent of packed tower simultaneously, absorbs the N produced in the sewage disposal process collected by gas skirt2O, interior The nitrate that nitrifying process in Aerobic Process for Treatment pond produces is transported to anoxic treatment pond by circulating pump and carries out anti-nitre by circulation fluid again Change, the most also absorb the N in gas2O, the N of the dissolved2O enters anoxic treatment pond along with interior circulation fluid, in Denitrification Under, the dissolved N2O is reduced to N2, drastically reduce the area sewage disposal process N2The discharge capacity of O.
CN201610650607.3A 2016-08-10 2016-08-10 A kind of sewage disposal and N2the coupling device of O reduction of discharging and operation method thereof Pending CN106277570A (en)

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CN111302502A (en) * 2020-02-24 2020-06-19 河海大学 Emission reduction method for nitrous oxide in lakeside zone
CN113281480A (en) * 2021-05-13 2021-08-20 吴迅海 Device for measuring carbon emission of sewage and statistical method for carbon emission of sewage
CN113651505A (en) * 2021-08-23 2021-11-16 上海市政工程设计研究总院（集团）有限公司 Multifunctional excess sludge tank and sludge treatment method thereof
CN114538710A (en) * 2022-03-01 2022-05-27 桂林理工大学 N2O emission reduction sewage integrated treatment system and method

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CN103214146A (en) * 2013-04-09 2013-07-24 中国科学院生态环境研究中心 Biological-physicochemical combined process for controlling N2O discharge in sewage treatment process
CN205933541U (en) * 2016-08-10 2017-02-08 河南师范大学 Composite set that control sewage treatment N2O discharged

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CN108726676A (en) * 2017-04-21 2018-11-02 湖南山河美生物环保科技股份有限公司 One-stop AO degradations high-concentration sewage resource utilization system
CN111302502A (en) * 2020-02-24 2020-06-19 河海大学 Emission reduction method for nitrous oxide in lakeside zone
CN113281480A (en) * 2021-05-13 2021-08-20 吴迅海 Device for measuring carbon emission of sewage and statistical method for carbon emission of sewage
CN113651505A (en) * 2021-08-23 2021-11-16 上海市政工程设计研究总院（集团）有限公司 Multifunctional excess sludge tank and sludge treatment method thereof
CN114538710A (en) * 2022-03-01 2022-05-27 桂林理工大学 N2O emission reduction sewage integrated treatment system and method

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Application publication date: 20170104