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CN101935132A - A2/O-biofilm synchronous denitrification and phosphorus removal device and method for urban sewage mixed fecal sewage - Google Patents

A2/O-biofilm synchronous denitrification and phosphorus removal device and method for urban sewage mixed fecal sewage Download PDF

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CN101935132A
CN101935132A CN2010102321282A CN201010232128A CN101935132A CN 101935132 A CN101935132 A CN 101935132A CN 2010102321282 A CN2010102321282 A CN 2010102321282A CN 201010232128 A CN201010232128 A CN 201010232128A CN 101935132 A CN101935132 A CN 101935132A
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CN101935132B (en
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周少奇
周晓
曾武
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South China University of Technology SCUT
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/308—Biological phosphorus removal
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/08—Aerobic processes using moving contact bodies
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • C02F3/1273—Submerged membrane bioreactors
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/005—Black water originating from toilets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract

本发明公开了城市污水混合粪便污水A2/O-生物膜同步脱氮除磷装置及方法。该装置的第二好氧池通过管道和混合液回流泵与缺氧池连接，沉淀池通过管道和污泥回流泵与厌氧池连接；所述第一好氧池第二好氧池内分散有悬浮填料；悬浮填料为立体中空的轻质多孔陶粒。该方法在传统AAO工艺的曝气池中投加悬浮填料，提供微生物附着生长表面的载体，提高曝气池内的生物量，增加废水的处理能力，克服污泥膨胀，使曝气池中同时存在附着相和悬浮相，充分发挥两者的优越性，本发明在不增加反应器体积的前提下，强化发生硝化反应的条件，提高传统的活性污泥法工艺脱氮除磷的功能，并解决传统AAO工艺在脱氮除磷过程中的泥龄矛盾问题，且水处理效果好。

Figure 201010232128

The invention discloses a device and method for synchronous denitrification and dephosphorization of urban sewage mixed feces and sewage A 2 /O-biofilm. The second aerobic tank of the device is connected with the anoxic tank through the pipeline and the mixed liquid return pump, and the sedimentation tank is connected with the anaerobic tank through the pipeline and the sludge return pump; Suspended filler; Suspended filler is three-dimensional hollow lightweight porous ceramsite. In this method, suspended fillers are added to the aeration tank of the traditional AAO process to provide a carrier for microorganisms to attach to the growth surface, increase the biomass in the aeration tank, increase the treatment capacity of wastewater, overcome sludge swelling, and make the aeration tank simultaneously exist Adhesive phase and suspension phase, giving full play to the advantages of both, the present invention strengthens the conditions for nitrification without increasing the volume of the reactor, improves the denitrification and phosphorus removal functions of the traditional activated sludge process, and solves the problem of The traditional AAO process has the contradiction of sludge age in the process of nitrogen and phosphorus removal, and the water treatment effect is good.

Figure 201010232128

Description

Municipal effluent mixing fecal sewage A 2/ O-microbial film synchronous denitrification dephosphorizing device and method
Technical field
The present invention relates to wastewater processing technology, particularly relate to a kind of municipal effluent mixing fecal sewage A 2/ O-microbial film synchronous denitrification dephosphorizing treatment unit and technology thereof.
Background technology
In existing sewage and the biological wastewater treatment process, removing of nitrogen phosphorus is more more complex than the removal of carbon element, nitrated, the denitrification that relate to nitrogen, the processes such as phosphorus and suction phosphorus of releasing of microorganism, the purpose of above-mentioned each process is different, microorganism is formed, and the requirement of matrix type and envrionment conditions is also different.How in a water treatment device various appropriate reaction conditionss organically to be combined, be a significant problem.
Since Wuhrmann in 1932 utilizes the endogenous nitrogen of having set up the rear-mounted denitrification technology removal municipal effluent of microorganism, improvement and development through over half a century, 1984 by Deakyne, Patel and Krichten have proposed on the present engineering of water treatment to use the most general, the most succinct A of technology 1(Anaerobic) A 2(anoxic) O (Oxygen) denitrification dephosphorization technique is called for short A 1A 2O technology or title A 2/ O technology.
A 2/ O technology is made up of anaerobic zone, oxygen-starved area, aerobic zone, settling region and two return-flow systems, and its function is an anaerobic phosphorus release, the anoxic denitrification denitrogenation, aerobic nitrification is inhaled phosphorus, after precipitation, mud-water separation, discharge dephosphorization with excess sludge, but there are two big defectives in this technology:
The first, mud contradiction in age affects the effect of denitrogenation dephosphorizing.Nitrifier all belongs to autotrophic type obligate aerobic bacteria usually, and generation time is long.In winter, nitrifier breeds and is more than 30 days required generation time, even in summer, mud age less than 5 days activated sludge process system in nitrification also very faint.PolyP bacteria and denitrifier mostly are short mud microorganism in age, and mud age, generally in 10 days, mud is short more age, and was faster more than denitrification speed, and 4 days mud is 2.5 times of 8 days mud ages age.Other has report, and in U.S. Hyperion Sewage Plant, when water temperature during at 22～24 ℃, the mud weak point in age of dephosphorization system reaches 3.1 days, and water outlet phosphorus only is 0.4mg/L.The generation time of this explanation polyP bacteria is very short really.Unique channel of biological phosphate-eliminating is to get rid of excess sludge in addition, also requires short mud age, just can have more phosphorus to get rid of with excess sludge.Obviously, nitrifier and polyP bacteria exist contradiction at mud on age, common during by two quasi-microorganisms with a backflow sludge drainage system, the mud of total system has to be controlled at a very narrow scope age, though this mediation can make system possess the denitrogenation dephosphorizing function, but can not make two quasi-microorganisms performance advantage separately, influence the effect of denitrogenation dephosphorizing.
At mud contradiction in age, people have developed A again 1/ O-A 2/ O technology and A 1/ A 2/ O-O technology.This water technology is than conventional A 2/ O technology has solved mud contradiction in age limitedly, but its water treatment process is then further complicated, has the denitrifying carbon source deficiency, and nitrifying sludge can not utilize again.And do not end so far, do not see better method as yet and solve mud contradictory problems in age.
The second, the nitrate in the returned sluge influences the effect of the dephosphorization denitrogenation of technology.At conventional A 2In/O the technology, before anaerobic zone is located at, returned sluge can be brought a part of nitrate into this district inevitably, can have a strong impact on the phosphorus speed of releasing of polyP bacteria, especially VFA is less in water inlet, when the mud phosphorus content was not high again, so the existence of nitrate even can cause polyP bacteria directly to inhale phosphorus was at conventional A 2Under the framework of/O technology, how to avoid nitrate to enter anaerobic zone and disturb polyP bacteria to release phosphorus, become the research focus, the key that solves the nitrate problem is how before returned sluge enters anaerobic zone, manages its nitrate that carries is consumed.Around this problem people JHB technology, EASC technology, UCT technology etc. have been proposed. there is the scholar to propose the imagination of inversion A AO technology in recent years.Replace the mixed-liquor return of conventional AAO technology by refluxing with 100%～200% mud, this technology is preposition with anoxic pond, and denitrification effect is improved, and also makes anaerobic pond avoid the interference of nitrate.
Fecal sewage is from the urban night soil treatment station, be ight soil after filtration with desanding after the ight soil filtered liquid, belong to the high organic concentration sewage of high ammonia nitrogen, must do harmless treatment.Fecal sewage contains abundant machine thing and materials such as nitrogen, phosphorus, if directly discharging can cause water pollution to distribute the obnoxious flavour of odor pollutants such as containing ammonia, hydrogen sulfide, mercaptan and thioether, environment is caused severe contamination.The approach of domestic processing fecal sewage mainly contains: 1. individual curing, and this mode intractability is bigger, and technical process is long, running cost height, operational administrative complexity; 2. incorporating municipal wastewater treatment plant into handles.The source of fecal sewage mainly contains 2: once being the environmental sanitation public lavatory, except that part was agricultural, all the other unified harmless treatment factories that transport to entered Sewage Plant and handle after handling every slag; The 2nd, the ight soil that socialization manure pit (septic tank in the dwelling house except that the environmental sanitation public lavatory, office building, hotel, hotel) produces drains into sewage network after processing reaches innoxious standard through three grades of change excrement, is delivered to Sewage Plant and handles.The decontamination of human excreta treatment plant that China is also comparatively imperfect, the urban night soil treatment station that has does not have the treatment facility of fecal sewage, execute in order to maximally utilise to build, and because fecal sewage has the high and high nitrogenous characteristics of organic concentration, can utilize the proportionality action of municipal effluent, reduce the fecal sewage intractability and improve the biodegradability of municipal sewage treatment buffering, dilution and the nutritive substance of fecal sewage.So the municipal sewage plant bears the processing of fecal sewage, become a kind of possible technique of handling fecal sewage.But in the actual motion municipal effluent with merge from the fecal sewage of harmless treatment factory handle after, the high density water quality of ight soil liquid is often brought various adverse influences to city domestic sewage factory, serious to the inhibiting nitrification influence, the special qualified discharge that influence ammonia nitrogen and total nitrogen in the water outlet, denitrification percent decline.
Therefore, combined sewage is stablized, efficient denitrification is the problem that realizes that fecal sewage and municipal effluent are handled key simultaneously up to standard simultaneously and needed primarily to solve, the proposition of this technology alleviates water environment pollution and is of great practical significance for dealing carefully with fecal sewage.
Summary of the invention
The objective of the invention is to be to overcome the shortcoming of prior art, a kind of sludge bulking that overcomes is provided, solve the municipal effluent mixing fecal sewage A2/O-microbial film synchronous denitrification dephosphorizing device of the mud age contradictory problems of traditional AAO technology in the denitrogenation dephosphorizing process.
Another object of the present invention is providing municipal effluent and the fecal sewage A that uses said apparatus 2/ O-microbial film synchronous denitrification and dephosphorization method.
The present invention adds floating stuffing in the aeration tank of traditional AAO technology, the carrier on attached growth of microorganisms surface is provided, and exists simultaneously in the aeration tank and adheres to mutually and suspending phase, thereby formed A 2/ O-biomembrane process.The present invention has improved the biomass in the gas pond, and strengthened the condition that nitration reaction takes place, increase the processing power of waste water, overcome sludge bulking, improve the stability of operation, improve the function of traditional Activated Sludge Process denitrogenation dephosphorizing, and solve the mud age contradictory problems of traditional AAO technology in the denitrogenation dephosphorizing process.
First purpose of the present invention is achieved through the following technical solutions:
A kind of municipal effluent and fecal sewage A 2/ O-microbial film synchronous denitrification dephosphorizing device comprises the anaerobic pond, anoxic pond, first Aerobic Pond, second Aerobic Pond and the settling tank that connect successively; Be respectively equipped with stirring rake in anaerobic pond and the anoxic pond, first Aerobic Pond and second Aerobic Pond bottom are respectively equipped with aeration head, and two aeration heads are connected with two air compressor respectively; Described second Aerobic Pond is connected with anoxic pond with the mixed-liquor return pump by pipeline, and settling tank is connected with anaerobic pond with sludge reflux pump by pipeline; Be dispersed with floating stuffing in described first Aerobic Pond, second Aerobic Pond; Floating stuffing is the light porous haydite of three-dimensional hollow, cubic capacity according to first Aerobic Pond and second Aerobic Pond calculates, and the dosing ratio of floating stuffing is 20%～30%, wherein, by volume, the floating stuffing dosing ratio of first Aerobic Pond and second Aerobic Pond is 1: 1-3.
Described anaerobic pond, anoxic pond, first Aerobic Pond and second Aerobic Pond preferably are arranged in the same housing, separate by dividing plate.
The floating stuffing dosing ratio of described first Aerobic Pond and second Aerobic Pond is preferably 1: 3.
The volume ratio of described first Aerobic Pond and second Aerobic Pond is preferably 1: 1.
Another object of the present invention is achieved through the following technical solutions:
Use the municipal effluent and the fecal sewage A of said apparatus 2/ O-microbial film synchronous denitrification and dephosphorization method: municipal effluent and fecal sewage and returned sluge at first enter anaerobic pond and release phosphorus, enter anoxic pond again and carry out the denitrification dehydrogenation; Municipal effluent and fecal sewage enter first Aerobic Pond and second Aerobic Pond successively then, under the effect of the nitrobacteria on first Aerobic Pond and the second Aerobic Pond inner suspension filler, carry out nitrated suction phosphorus, nitrobacteria is grown on the active sludge of floating stuffing, active sludge can be cultivated the eliminating amount of polyP bacteria and denitrifying bacterium increase excess sludge respectively, and the hydraulic detention time of first Aerobic Pond and second Aerobic Pond is 4-8h; Municipal effluent and fecal sewage are after mud-water separation, and sludge volume is back to anaerobic zone with the ratio of 40-80%, and excess sludge is discharged; Water outlet is discharged from settling tank.
Compared with the prior art, the present invention has following beneficial effect:
(1) the present invention is at A 2/ O-biomembrane process is on existing basis, add floating stuffing by in first Aerobic Pond and second Aerobic Pond, setting up, the carrier on attached growth of microorganisms surface is provided, enrichment nitrifier on the floating stuffing, preferably resolve the mud contradiction in age of biological carbon and phosphorous removal, make anaerobic pond avoid the interference of nitrate.Also improve the biomass in the aeration tank, increase the processing power of waste water, overcome sludge bulking, make to exist simultaneously in the aeration tank and adhere to mutually and suspending phase, give full play to both superiority.
When (2) the water source anxiety is alleviated in the present invention, disposing for the comprehensive treating process of fecal sewage provides economic, convenient, reasonable, feasible terms of settlement, because of not taking more soil, do not increase initial cost yet, not only has the huge social benefit, bring considerable economic and environmental benefit simultaneously, and promote the development of sewage disposal resource utilization.
(3) A of the present invention 2The treatment process of/O-microbial film synchronous denitrification dephosphorizing is as follows to the removal effect of pollutent: the removal effect to COD and phosphorus is good, and water outlet COD is below 40mg/L, and the phosphorus water outlet is below 0.35mg/L; The water outlet ammonia nitrogen is below 4mg/L.Every effluent quality index all reaches and is better than the discharging standards primary standard.
Description of drawings
Fig. 1 is municipal effluent mixing fecal sewage A 2/ O-microbial film synchronous denitrification dephosphorizing apparatus structure synoptic diagram;
Fig. 2 is the removal effect figure of application drawing 1 device to COD;
Fig. 3 is the removal effect figure of application drawing 1 device to ammonia nitrogen;
Fig. 4 is the removal effect figure of application drawing 1 device to total nitrogen;
Fig. 5 is the removal effect figure of application drawing 1 device to total phosphorus.
Embodiment
The invention will be further described below in conjunction with drawings and Examples, but the present invention's scope required for protection is not limited to the scope described in the embodiment.
As shown in Figure 1, municipal effluent mixing fecal sewage A 2/ O-microbial film synchronous denitrification dephosphorizing device comprises anaerobic pond I, anoxic pond II, the first Aerobic Pond III, the second Aerobic Pond IV and the settling tank V that connects successively; Be respectively equipped with stirring rake 2 in anaerobic pond I and the anoxic pond II, the first Aerobic Pond III and second Aerobic Pond IV bottom are respectively equipped with aeration head, two aeration heads 3 are connected with two air compressor 4 respectively, the second Aerobic Pond IV is connected with anoxic pond II with mixed-liquor return pump 5 by pipeline, and settling tank V is connected with anaerobic pond I with sludge reflux pump 6 by pipeline; Be dispersed with floating stuffing 8 in the first Aerobic Pond III and the second Aerobic Pond IV.Floating stuffing is the light porous haydite of three-dimensional hollow, and specifications and models are
Figure BSA00000198545100051
Density is 0.8g/cm less than water 3Floating stuffing cubic capacity dosing ratio in 2 Aerobic Ponds (the first Aerobic Pond III and the second Aerobic Pond IV) is 20%～30%, because floating stuffing 8 is light porous haydites, active sludge is easily adhered on the surface, and the carrier of growing environment is provided for the nitrobacteria group in the active sludge.Wherein the volume ratio of the floating stuffing that adds in the first Aerobic Pond III and the second Aerobic Pond IV is 1: 1-3, promptly dosing mode is 1: 1-3, preferred dosing mode is 1: 3.Anaerobic pond I, anoxic pond II, the first Aerobic Pond III and the second Aerobic Pond IV are arranged in the same housing, are separated to form by dividing plate.Aerobic Pond is divided into former and later two ponds, is respectively the first Aerobic Pond III and the second Aerobic Pond IV.
This technology is by anaerobic zone, oxygen-starved area, and 2 aerobic material charging regions constitute.Wherein anaerobic zone is at head end, and the oxygen-starved area requires to throw in floating stuffing according to water treatment in aerobic material charging region behind anaerobic zone, and return sludge pump is communicated with anaerobic zone and settling tank, and the mixed-liquor return pump is communicated with anoxic pond and aerobic filler pond.
During device work, municipal effluent and fecal sewage and returned sluge at first enter anaerobic pond I and release phosphorus, enter anoxic pond II again and carry out the denitrification dehydrogenation; Municipal effluent and fecal sewage enter the first Aerobic Pond III and the second Aerobic Pond IV successively then, under nitrobacteria acts in the active sludge that adheres on the first Aerobic Pond III and the second Aerobic Pond IV inner suspension filler, carry out nitrated suction phosphorus, the purpose that adds filler is the carrier that is used to provide the nitrifying bacteria community growing environment.In the first Aerobic Pond III and the second Aerobic Pond IV, floating stuffing is not participated in backflow, and mud long nitrobacteria in age that can grow on it carries out nitrated suction phosphorus; Because nitrifier mud reaches more than the 30d age, but mud age of polyP bacteria and denitrifier generally in 10d, nitrifier and polyP bacteria exist contradiction at mud on age.Active sludge can be cultivated the eliminating amount that polyP bacteria and denitrifying bacterium increase excess sludge respectively, so also meets the requirement of the polyP bacteria dephosphorization in short mud age, can solve the mud contradiction in age of sewage treatment process.Municipal effluent and fecal sewage enter settling tank V successively then, and after mud-water separation, mud 40%～80% ratio by volume is back to anaerobic zone, and excess sludge is discharged; Water outlet 7 is discharged from settling tank V.The returned sluge system is communicated with anaerobic pond and settling tank, can guarantee the good operation of nitration reaction; The mixed-liquor return system is communicated with anoxic pond and aerobic filler pond, can play and improve aerobic filler pond mixing efficiency, and then improve oxygen transfer efficiency.
Embodiment
Municipal effluent mixing fecal sewage A 2/ O-microbial film synchronous denitrification dephosphorizing device is the steel plate quality, designing treatment water yield 500L/h, and length overall is 2.9m, and wide is 1.2m, and height is 1.3m, and effective volume is about 3.8m 3, reaction tank is divided into anaerobic pond I, anoxic pond II, the first Aerobic Pond III and the second Aerobic Pond IV, wherein anaerobic pond effective volume 0.5m by dividing plate 3Anoxic pond effective volume 0.8m 3, stirring rake 2 is all installed in two ponds, and motor speed is 1390r/min.The first Aerobic Pond III and the second Aerobic Pond IV effective volume 2.5m 3, the bottom is respectively equipped with aeration head, can control aeration rate by valve, among the second Aerobic Pond IV online dissolved oxygen meter is housed, and at the Aerobic Pond end mixed-liquor return pipe is housed.System's end is rectangular sedimentation tank V, effective volume 0.9m 3, shore pipe and mud return line are arranged at the bottom.All take Bypass Control according to actual motion mixed-liquor return and mud return flow, unnecessary flow part is returned Aerobic Pond end and settling tank respectively by arm.(floating stuffing is the light porous haydite of three-dimensional hollow, and specification is to be dispersed with floating stuffing 8 in the first Aerobic Pond III and the second Aerobic Pond IV Density is 0.8g/cm less than water 3, the volume dosing ratio of floating stuffing is 20%～30%).Water inlet 1 is directly extracted from settling pit by submersible pump, carries out flow control by bypass.Water outlet 7 is discharged from settling tank V.
The average ammonia nitrogen concentration of municipal effluent mixing fecal sewage is 23.29mg/L, and the total nitrogen concentration of on average intaking is that the total phosphorus concentration of on average intaking is 3.15mg/L at 24.33mg/L, and the COD concentration of on average intaking is 134.81mg/L.Investigate each factor respectively, A 2The effect of the treatment process of/O-microbial film synchronous denitrification dephosphorizing, the investigation time is 4d.The experiment of single factor result is as follows:
(1) when the filler dosing mode is 1: 3, the ammonia nitrogen average removal rate is 92.73%; Total nitrogen average removal rate 72.16%; The total phosphorus average removal rate is 88.02%; The COD average removal rate is 74.51%.
(2) when the aerobic tank waterpower residence time is 4h, the ammonia nitrogen average removal rate is 92.73%; The total nitrogen average removal rate is 72.16%; The COD average removal rate is 74.51%.
(3) when return current ratio of the mixed liquid be 120%, the ammonia nitrogen average removal rate is 82.02%; The total nitrogen average removal rate is 64.87%; The total phosphorus average removal rate is 89.3%; The COD average removal rate is 71.77%.
(4) when return sludge ratio be 40%, the ammonia nitrogen average removal rate is 76.45%; The total nitrogen average removal rate is 57.35%; The total phosphorus average removal rate is 88.36%; The COD average removal rate is 71.76%.
Implementation result
Investigate A according to above experiment of single factor 2The result of implementation of the treatment process of/O-microbial film synchronous denitrification dephosphorizing, adopting floating stuffing cubic capacity dosing ratio in 2 Aerobic Ponds is 20%～30%, the volume ratio of the floating stuffing that adds in the first Aerobic Pond III and the second Aerobic Pond IV is 1: 3, and promptly dosing mode is 1: 3; Aerobic Pond hydraulic detention time 4h; The reflux ratio 120% of mixed solution; Return sludge ratio 40% with these four kinds of condition integrated applications, has been investigated A 2The implementation result of the treatment process of/O-microbial film synchronous denitrification dephosphorizing.Be 30 days reaction time.
1, the removal effect of COD
By accompanying drawing 2 A as can be seen 2The treatment process of/O-microbial film synchronous denitrification dephosphorizing has good effect of removing to COD.The combined sewage COD change in concentration that enters pilot plant is bigger, and the COD concentration ratio of intaking generally is lower.Effluent COD concentration is also lower, illustrates that organic pollutant is fully utilized.Average water inlet COD is about 134.81mg/L, and water outlet COD is generally below 40mg/L.The COD clearance reaches as high as 88.37%, and average removal rate can reach 70.41%.COD is the carbon source of microorganism growth in the sewage treatment process, and when carrying out the denitrification dephosphorization function of sewage, the denitrification denitrogenation Pseudomonas when oxygen free condition, is that electron donor and nutrition source carry out anti-nitration reaction with the organic carbon in the heterotroph facultative anaerobe.And the polyP bacteria of realizing dephosphorization function needs active absorption to transform the acetate glycosides that organism becomes in the water by the anaerobic fermentation and acid production bacterium, and this also can consume carbon source.Simultaneously microbial growth also needs to consume the integral part that organism in the sewage changes into self cell.
2, the removal effect of ammonia nitrogen and total nitrogen
By accompanying drawing 3 and accompanying drawing 4 as can be seen, total nitrogen concentration is lower generally to enter the combined sewage of pilot plant, but because high nitrogenous the sneaking into moment of fecal sewage causes fluctuation ratio bigger, wherein, intake minimum TN concentration more than 20mg/L, the highest TN concentration of intaking is at 38.63mg/L, average water inlet TN is at 24.33mg/L, and through the denitrification denitrogenation effect of microorganism, the water outlet total nitrogen is generally below 15mg/L, the water outlet minimum concentration is 11.03mg/L, the water outlet maximum concentration is 14.36mg/L, and average out to 12.9mg/L is in the emission standard scope, mainly be because system has the nitrification effect of efficient stable, guaranteed the denitrification effect of system.
3, the removal effect of total phosphorus
By accompanying drawing 5 as can be seen, A as can be seen 2The treatment process of/O-microbial film synchronous denitrification dephosphorizing has good effect of removing to total phosphorus.The fluctuation ratio that enters total phosphorus concentration is bigger.The T-P minimum concentration 1.66mg/L of wherein intaking, maximum concentration is at 6.26mg/L, mean concns is 3.15mg/L, through the dephosphorization function of microorganism, water outlet T-P generally below 0.5mg/L, average out to 0.35mg/L.The T-P clearance reaches as high as 96.72% more than 75%, and average removal rate can reach 87.89%.
Comprehensive above-mentioned experiment, A of the present invention 2The treatment process of/O-microbial film synchronous denitrification dephosphorizing is as follows to the removal effect of pollutent: the removal effect to COD and phosphorus is good, and water outlet COD is below 40mg/L, and the phosphorus water outlet is below 0.35mg/L; The water outlet ammonia nitrogen is below 4mg/L.Every effluent quality index all reaches and is better than national grade one discharge standard.

Claims (5)

1.一种城市污水和粪便污水A2/O-生物膜同步脱氮除磷装置，包括依次连接的厌氧池、缺氧池、第一好氧池、第二好氧池和沉淀池；厌氧池和缺氧池内分别设有搅拌桨，第一好氧池和第二好氧池底部分别设有曝气头，两曝气头分别与两空气压缩机连接；其特征在于：所述第二好氧池通过管道和混合液回流泵与缺氧池连接，沉淀池通过管道和污泥回流泵与厌氧池连接；所述第一好氧池第二好氧池内分散有悬浮填料；悬浮填料为立体中空的轻质多孔陶粒，按照第一好氧池和第二好氧池的总容积计算，悬浮填料的投配比为20％～30％，其中，以体积计，第一好氧池和第二好氧池的悬浮填料投配比为1∶1-3。1. A 2 /O-biofilm synchronous denitrification and phosphorus removal device for urban sewage and fecal sewage, comprising an anaerobic tank, anoxic tank, first aerobic tank, second aerobic tank and sedimentation tank connected in sequence; The anaerobic tank and the anoxic tank are respectively equipped with stirring paddles, and the bottoms of the first aerobic tank and the second aerobic tank are respectively provided with aeration heads, and the two aeration heads are respectively connected with two air compressors; it is characterized in that: The second aerobic tank is connected to the anoxic tank through a pipeline and a mixed liquid return pump, and the sedimentation tank is connected to the anaerobic tank through a pipeline and a sludge return pump; suspended fillers are dispersed in the first aerobic tank and the second aerobic tank; Suspended filler is three-dimensional hollow lightweight porous ceramsite. Calculated according to the total volume of the first aerobic tank and the second aerobic tank, the proportion of suspended filler is 20% to 30%. Among them, in terms of volume, the first The proportioning ratio of suspended filler in the aerobic tank and the second aerobic tank is 1:1-3. 2.根据权利要求1所述的城市污水和粪便污水A2/O-生物膜同步脱氮除磷装置，其特征在于：所述厌氧池、缺氧池、第一好氧池和第二好氧池设置在同一壳体内，通过隔板分隔。2. The urban sewage and fecal sewage A 2 /O-biofilm synchronous nitrogen and phosphorus removal device according to claim 1, characterized in that: the anaerobic pool, the anoxic pool, the first aerobic pool and the second The aerobic pools are arranged in the same shell and separated by partitions. 3.根据权利要求1所述的城市污水和粪便污水A2/O-生物膜同步脱氮除磷装置，其特征在于：所述第一好氧池和第二好氧池的悬浮填料投配比为1∶3。3. The urban sewage and fecal sewage A 2 /O-biofilm synchronous denitrification and dephosphorization device according to claim 1, characterized in that: the suspended fillers in the first aerobic tank and the second aerobic tank are mixed The ratio is 1:3. 4.根据权利要求1所述的城市污水和粪便污水A2/O-生物膜同步脱氮除磷装置，其特征在于：所述第一好氧池和第二好氧池的体积比为1∶1。4. The urban sewage and fecal sewage A 2 /O-biofilm synchronous nitrogen and phosphorus removal device according to claim 1, characterized in that: the volume ratio of the first aerobic pool to the second aerobic pool is 1 : 1. 5.应用权利要求1所述装置的城市污水和粪便污水A2/O-生物膜同步脱氮除磷方法，其特征在于：城市污水和粪便污水以及回流污泥首先进入厌氧池释磷，再进入缺氧池进行反硝化脱氢；然后城市污水和粪便污水依次进入第一好氧池和第二好氧池，在第一好氧池和第二好氧池内悬浮填料上的硝化细菌作用下，进行硝化吸磷，硝化细菌生长在悬浮填料的活性污泥上，活性污泥可分别培养聚磷菌和反硝化细菌增加剩余污泥的排除量，第一好氧池和第二好氧池的水力停留时间为4-8h；城市污水和粪便污水经泥水分离后，污泥体积以40-80％的比例回流到厌氧区，剩余污泥排出；出水从沉淀池排出。5. The method for synchronous denitrification and phosphorus removal of urban sewage and fecal sewage A 2 /O-biofilm using the device described in claim 1, characterized in that: urban sewage, fecal sewage and return sludge first enter the anaerobic tank to release phosphorus, Then enter the anoxic pool for denitrification and dehydrogenation; then urban sewage and fecal sewage enter the first aerobic pool and the second aerobic pool in turn, and the nitrifying bacteria on the suspended filler in the first aerobic pool and the second aerobic pool act Nitrifying and absorbing phosphorus, nitrifying bacteria grow on the activated sludge of suspended filler, activated sludge can respectively cultivate phosphorus accumulating bacteria and denitrifying bacteria to increase the removal of excess sludge, the first aerobic tank and the second aerobic tank The hydraulic retention time of the pool is 4-8h; after the urban sewage and fecal sewage are separated by mud and water, the sludge volume is returned to the anaerobic zone at a ratio of 40-80%, and the remaining sludge is discharged; the effluent is discharged from the sedimentation tank.
CN2010102321282A 2010-07-20 2010-07-20 A2/O-biofilm synchronous denitrification and phosphorus removal device and method for urban sewage mixed fecal sewage Expired - Fee Related CN101935132B (en)

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