CN101792236A - Sewage treatment method - Google Patents

Sewage treatment method Download PDF

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Publication number
CN101792236A
CN101792236A CN 201010134330 CN201010134330A CN101792236A CN 101792236 A CN101792236 A CN 101792236A CN 201010134330 CN201010134330 CN 201010134330 CN 201010134330 A CN201010134330 A CN 201010134330A CN 101792236 A CN101792236 A CN 101792236A
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China
Prior art keywords
pond
aerobic
mixed solution
mud
anaerobic
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CN 201010134330
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Chinese (zh)
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CN101792236B (en
Inventor
王涛
刘杰
李伟民
肖海文
王启栋
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重庆大学
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Abstract

The invention relates to a sewage treatment method, in particular to a sewage treatment method which can solve the contradiction between denitrification as well as dephosphorization and sludge reduction. The method improves the operating way of the conventional A2/O technique, and a sludge reduction device is designed. As the improved A2/O technique and the sludge reduction device are adopted to operate in a combining way, a system can implement a dephosphorization way combining bypass chemical dephosphorization and biological dephosphorization, and the sludge reduction device can be used for reducing high-concentration sludge in a secondary sedimentation tank in a special operating way. The whole system has better sludge reduction effect and better denitrification and dephosphorization effect, and solves the contradiction between denitrification as well as dephosphorization and sludge reduction in the existing sludge reduction method.

Description

A kind of sewage water treatment method
Technical field
The invention belongs to sewage water treatment method, particularly a kind of treatment process that can solve contradiction between denitrogenation dephosphorizing and the mud decrement.
Background technology
At present, the various countries scholar has begun sludge reduction Study on Technology in the sewage disposal and has obtained certain achievement.The mud decrement technology that exists both at home and abroad mainly contains following three classes at present: a class is the mud decrement technology of recessive growth, mainly contains molten born of the same parents' technology of ozone and ultrasonic wave Decrement Technique etc.; Second class is the Decrement Technique of uncoupling growth, mainly comprises the OSA Technology that adds uncoupling agent and promote mud unstable state growth; The 3rd class is the microfauna sludge decrement process, is included in and cultivates microfauna and two-stage method technology in the conventional Sewage treatment systems.The decrement effect that these mud decrement technology can both acquire a certain degree, but all because of existing various shortcomings to limit its popularization and utilization to a certain extent.Wherein, the common problem of preceding two class Decrement Technique mainly is can not guarantee effluent quality preferably when realizing better mud decrement effect, and especially nitrogen phosphorus removal effect is relatively poor.
Along with the aggravation of body eutrophication trend, the removal of nutritive elements such as nitrogen phosphorus has become the vital task of municipal sewage treatment, how to guarantee to realize under the prerequisite with better denitrogenation dephosphorizing effect mud decrement, is the direction that the sludge reduction technology remains to be developed.Up to now, still do not have and a kind ofly can reach the wastewater processing technology that better mud decrement effect does not influence system's denitrogenation dephosphorizing effect simultaneously again.Therefore, exploitation is a kind of has better mud decrement effect, a denitrogenation dephosphorizing and the sewage treatment process that do not reduce wastewater treatment efficiency is very necessary preferably simultaneously again.
Summary of the invention
The objective of the invention is to solve above-mentioned the deficiencies in the prior art, and a kind of have better mud decrement effect, denitrogenation dephosphorizing and do not reduce the sewage water treatment method of wastewater treatment efficiency preferably simultaneously are provided.
A kind of sewage water treatment method involved in the present invention is characterized in that step is as follows:
1) through pretreated sewage through A 2/ O technology anaerobic pond water-in enters anaerobic pond, mixed solution residence time in anaerobic pond is about 2h, the mixed solution that carries out behind the anaerobic phosphorus release has 10% to flow into medium sediment pool approximately, and residual mixed liquor flows into through the anoxic pond water-in that anoxic pond is carried out denitrification and organic matter removal is handled;
2) 10% mixed solution precipitates after flowing into medium sediment pool in the anaerobic pond, sedimentation time is about 1h, the mud that precipitates agitator in anaerobic pond stirs the hydraulic action that produces and is back to anaerobic pond from the medium sediment pool mud refluxing opening bottom the medium sediment pool, and the isolated rich phosphorus supernatant liquor of medium sediment pool is guided to the chemical dephosphorization pond;
3) adding an amount of concentration in the chemical dephosphorization pond is the sodium hydroxide solution of 1mol/L, regulating the pH value is about 9, rich phosphorus supernatant liquor is stirred, make it produce poly-hydroxy phosphatic rock precipitation through chemical reaction, poly-hydroxy phosphatic rock is reclaimed in static stable back at the bottom of pond, chemical dephosphorization pond;
4) the static supernatant liquor after stable in chemical dephosphorization pond is drained into Aerobic Pond, the mixed solution that flow to Aerobic Pond with anoxic pond carries out nitrated in the lump and organic matter removal is handled;
5) Aerobic Pond middle part nitrification liquid is back to anoxic pond with 150% nitrification liquid reflux ratio, through agitator stir with mixed solution thorough mixing from anaerobic pond after carry out denitrification denitrogenation, mixed solution residence time in anoxic pond is about 2h;
6) mixed solution after the anoxic pond denitrification is handled flows into Aerobic Pond through the Aerobic Pond water-in, Aerobic Pond is carried out aeration, keep Do to be about 3mg/L, under the stirring action of agitator, make dissolved oxygen and mixed solution thorough mixing, carry out nitration reaction and organism and further remove processing, mixed solution residence time in Aerobic Pond is about 9.5h;
7) mixed solution after Aerobic Pond is handled flows into second pond through the second pond water-in, carries out mud-water separation, and the isolated high concentration sludge of second pond drains into the mud decrement device, and discharges the second pond supernatant liquor simultaneously;
8) high concentration sludge flow through successively mud decrement device oxygen-starved area, detest/aerobic alternate area and pre-anaerobic zone, the residence time is followed successively by 1h, 6h and 0.5h, detest/aerobic alternate area carries out aeration time control by time switch to aerator, make to detest/the aerobic alternate intervals time is 1h, and control detest/the aerobic period Do in aerobic alternate area is 2mg/L;
9) will be back to A with 100% return sludge ratio through anaerobic pond mud refluxing opening through the mud after the mud decrement device decrement 2/ O technology anaerobic pond is got rid of excess sludge in the mud decrement device simultaneously.
A kind of sewage water treatment method involved in the present invention is by improvement A 2/ O technology combines with the mud decrement device, has solved the mud decrement that exists in the mud decrement technology of recessive growth and decoupling zero connection growth and the contradiction between the denitrogenation dephosphorizing, has reached denitrogenation dephosphorizing effect preferably when realizing better mud decrement effect.
Description of drawings
Fig. 1 is this sewage water treatment method schematic flow sheet
Fig. 2 is improvement A 2/ O technology orthographic plan
Fig. 3 is improvement A 2/ O technology vertical planning drawing
Fig. 4 is improvement A 2/ O technology side elevational view
Fig. 5 is the mud decrement setting plane
Fig. 6 is a mud decrement device vertical planning drawing
Embodiment
The present invention is further described as follows below in conjunction with drawings and Examples:
Referring to Fig. 1, the treatment system of this sewage water treatment method flow process is by A 2/ O process unit (being made up of anaerobic pond, anoxic pond and Aerobic Pond), medium sediment pool, chemical dephosphorization pond, second pond and mud decrement device are composed in series; Referring to Fig. 2 to Fig. 4, medium sediment pool and A 2/ O technology connects as one, and a wall is separated by between medium sediment pool and the anaerobic pond; The mud decrement device construction as shown in Figure 5 and Figure 6, by the oxygen-starved area, detest/aerobic alternate area and pre-anaerobic zone form.
The concrete sewage treatment process of this technical process is as follows:
1) through pretreated sewage through A 2/ O technology anaerobic pond water-in enters anaerobic pond, mixed solution residence time in anaerobic pond is about 2h, the mixed solution that carries out behind the anaerobic phosphorus release has 10% to flow into medium sediment pool approximately, and residual mixed liquor flows into through the anoxic pond water-in that anoxic pond is carried out denitrification and organic matter removal is handled;
2) 10% mixed solution precipitates after flowing into medium sediment pool in the anaerobic pond, sedimentation time is about 1h, the mud that precipitates agitator in anaerobic pond stirs the hydraulic action that produces and is back to anaerobic pond (medium sediment pool mud refluxing opening is seen shown in Figure 4) from the medium sediment pool bottom, and the isolated rich phosphorus supernatant liquor of medium sediment pool is guided to the chemical dephosphorization pond;
3) adding an amount of concentration in the chemical dephosphorization pond is the sodium hydroxide solution of 1mol/L, regulating the pH value is about 9, rich phosphorus supernatant liquor is stirred, make it produce poly-hydroxy phosphatic rock precipitation through chemical reaction, poly-hydroxy phosphatic rock is reclaimed in static stable back at the bottom of pond, chemical dephosphorization pond;
4) the static supernatant liquor after stable in chemical dephosphorization pond is drained into Aerobic Pond, the mixed solution that flow to Aerobic Pond with anoxic pond carries out nitrated in the lump and organic matter removal is handled;
5) Aerobic Pond middle part nitrification liquid is back to anoxic pond with 150% nitrification liquid reflux ratio, through agitator stir with mixed solution thorough mixing from anaerobic pond after carry out denitrification denitrogenation, mixed solution residence time in anoxic pond is about 2h;
6) mixed solution after the anoxic pond denitrification is handled flows into Aerobic Pond through the Aerobic Pond water-in, Aerobic Pond is carried out aeration, keep Do to be about 3mg/L, under the stirring action of agitator, make dissolved oxygen and mixed solution thorough mixing, carry out nitration reaction and organism and further remove processing, mixed solution residence time in Aerobic Pond is about 9.5h;
7) mixed solution after Aerobic Pond is handled flows into second pond through the second pond water-in, carries out mud-water separation, and the isolated high concentration sludge of second pond drains into the mud decrement device, and discharges the second pond supernatant liquor simultaneously;
8) high concentration sludge flow through successively mud decrement device oxygen-starved area, detest/aerobic alternate area and pre-anaerobic zone, the residence time is followed successively by 1h, 6h and 0.5h, detest/aerobic alternate area carries out aeration time control by time switch to aerator, make to detest/the aerobic alternate intervals time is 1h, and control detest/the aerobic period Do in aerobic alternate area is 2mg/L;
9) will be back to A with 100% return sludge ratio through anaerobic pond mud refluxing opening through the mud after the mud decrement device decrement 2/ O technology anaerobic pond is got rid of excess sludge in the mud decrement device simultaneously.
Embodiment:
Sanitary sewage with certain campus discharging is a process object, and the device flooding velocity is 6L/h, and the main water-quality guideline of intaking is: COD Cr=347~490mg/L, NH 4 +-N=32~40mg/L, TN=36~51mg/L, TP=4~9mg/L, PH=7~8.Above-mentioned former water conservancy is handled with sewage treatment process of the present invention.
After above-mentioned treatment process processing, the main water-quality guideline of second pond water outlet can reach: COD Cr≤ 55mg/L, TN≤13.9mg/L, TP≤0.7mg/L, system is to COD Cr, TN, TP average removal rate can reach 91.25%, 70.87% and 90.57% respectively, visible system handles effluent quality has reached " urban wastewater treatment firm pollutant emission standard " one-level B standard (GB18918-2002); Simultaneously, through measuring, the sludge yield of system is 0.276gMLSS/gCOD, with the conventional A of identical operating parameter 2/ O technology is compared, and this system has reached 38.3% mud decrement effect.

Claims (1)

1. sewage water treatment method is characterized in that step is as follows:
1) through pretreated sewage through A 2/ O technology anaerobic pond water-in enters anaerobic pond, mixed solution residence time in anaerobic pond is about 2h, the mixed solution that carries out behind the anaerobic phosphorus release has 10% to flow into medium sediment pool approximately, and residual mixed liquor flows into through the anoxic pond water-in that anoxic pond is carried out denitrification and organic matter removal is handled;
2) 10% mixed solution precipitates after flowing into medium sediment pool in the anaerobic pond, sedimentation time is about 1h, the mud that precipitates agitator in anaerobic pond stirs the hydraulic action that produces and is back to anaerobic pond from the medium sediment pool mud refluxing opening bottom the medium sediment pool, and the isolated rich phosphorus supernatant liquor of medium sediment pool is guided to the chemical dephosphorization pond;
3) adding an amount of concentration in the chemical dephosphorization pond is the sodium hydroxide solution of 1mol/L, regulating the pH value is about 9, rich phosphorus supernatant liquor is stirred, make it produce poly-hydroxy phosphatic rock precipitation through chemical reaction, poly-hydroxy phosphatic rock is reclaimed in static stable back at the bottom of pond, chemical dephosphorization pond;
4) the static supernatant liquor after stable in chemical dephosphorization pond is drained into Aerobic Pond, the mixed solution that flow to Aerobic Pond with anoxic pond carries out nitrated in the lump and organic matter removal is handled;
5) Aerobic Pond middle part nitrification liquid is back to anoxic pond with 150% nitrification liquid reflux ratio, through agitator stir with mixed solution thorough mixing from anaerobic pond after carry out denitrification denitrogenation, mixed solution residence time in anoxic pond is about 2h;
6) mixed solution after the anoxic pond denitrification is handled flows into Aerobic Pond through the Aerobic Pond water-in, Aerobic Pond is carried out aeration, keep Do to be about 3mg/L, under the stirring action of agitator, make dissolved oxygen and mixed solution thorough mixing, carry out nitration reaction and organism and further remove processing, mixed solution residence time in Aerobic Pond is about 9.5h;
7) mixed solution after Aerobic Pond is handled flows into second pond through the second pond water-in, carries out mud-water separation, and the isolated high concentration sludge of second pond drains into the mud decrement device, and discharges the second pond supernatant liquor simultaneously;
8) high concentration sludge flow through successively mud decrement device oxygen-starved area, detest/aerobic alternate area and pre-anaerobic zone, the residence time is followed successively by 1h, 6h and 0.5h, detest/aerobic alternate area carries out aeration time control by time switch to aerator, make to detest/the aerobic alternate intervals time is 1h, and control detest/the aerobic period Do in aerobic alternate area is 2mg/L;
9) will be back to A with 100% return sludge ratio through anaerobic pond mud refluxing opening through the mud after the mud decrement device decrement 2/ O technology anaerobic pond is got rid of excess sludge in the mud decrement device simultaneously.
CN2010101343301A 2010-03-29 2010-03-29 Sewage treatment method CN101792236B (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102616993A (en) * 2012-03-30 2012-08-01 南京大学连云港高新技术研究院 Residual sludge zero discharge denitrification and phosphorous removal process and device
CN102659288A (en) * 2012-05-21 2012-09-12 重庆大学 Low-carbon-source sewage treatment system for reinforcing denitrification and dephosphorization functions and method
CN102826640A (en) * 2011-06-17 2012-12-19 中国石油化工股份有限公司 Method for treating organic phosphorus production wastewater
CN102826723A (en) * 2012-09-20 2012-12-19 江苏艾特克环境工程有限公司 Treatment method for urban sanitary sewage
CN102826653A (en) * 2012-08-07 2012-12-19 深圳中水环境保护有限公司 Denitrification/dephosphorization bioreactor and sewage treatment method with same
CN104085987A (en) * 2014-07-10 2014-10-08 中国科学院生态环境研究中心 Method and device for synchronously realizing sewage nitrogen and phosphorus removal, residual sludge reduction and phosphorus resource recovery
CN104230109A (en) * 2014-09-23 2014-12-24 哈尔滨工业大学 System and method for treating high-organic-matter-content high-ammonia-nitrogen wastewater by UASB/A/MBBR (upflow anaerobic sludge blanket/anoxic/moving bed biofilm reactor) combined chemical process
CN104492128A (en) * 2014-12-15 2015-04-08 浦华环保有限公司 Compound functional primary settling tank, system containing compound functional primary settling tank and application of system
CN104761054A (en) * 2015-03-19 2015-07-08 叶长兵 Improvement and upgrading method of AO sewage treatment technology
CN104891754A (en) * 2015-07-09 2015-09-09 王洪臣 Wastewater treatment process and wastewater treatment system
CN104986854A (en) * 2015-07-07 2015-10-21 北京中斯水灵水处理技术有限公司 Sludge backflow control system and method and sewage treatment system
CN106565056A (en) * 2016-10-25 2017-04-19 西安建筑科技大学 Method for strengthening biological phosphorus removal of sewage and recycling phosphate resources from sewage
CN106810019A (en) * 2017-02-09 2017-06-09 山东建筑大学 A kind of reinforced phosphor-removing and sludge decrement type sewage treatment process
CN109574199A (en) * 2018-12-06 2019-04-05 天津市市政工程设计研究院 A kind of system and method improving biochemical reaction processing capacity
CN109607785A (en) * 2018-12-20 2019-04-12 济南大学 A method of it is recycled from A2/O system by-pass flow phosphorus
CN112174433A (en) * 2020-09-25 2021-01-05 重庆港力环保股份有限公司 Method for efficiently removing phosphorus in AO process

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CN101182072A (en) * 2007-11-14 2008-05-21 哈尔滨工业大学 Method for sludge decrement by using endogenous denitrification denitrification dephosphorization and reaction system
CN101544453A (en) * 2009-05-07 2009-09-30 重庆大学 Dephosphorization and denitrification, mud decrement and phosphorus recovery integrated sewage treatment device and method thereof

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102826640A (en) * 2011-06-17 2012-12-19 中国石油化工股份有限公司 Method for treating organic phosphorus production wastewater
CN102616993A (en) * 2012-03-30 2012-08-01 南京大学连云港高新技术研究院 Residual sludge zero discharge denitrification and phosphorous removal process and device
CN102659288A (en) * 2012-05-21 2012-09-12 重庆大学 Low-carbon-source sewage treatment system for reinforcing denitrification and dephosphorization functions and method
CN102826653A (en) * 2012-08-07 2012-12-19 深圳中水环境保护有限公司 Denitrification/dephosphorization bioreactor and sewage treatment method with same
CN102826653B (en) * 2012-08-07 2014-02-19 深圳中水环境保护有限公司 Denitrification/dephosphorization bioreactor and sewage treatment method with same
CN102826723A (en) * 2012-09-20 2012-12-19 江苏艾特克环境工程有限公司 Treatment method for urban sanitary sewage
CN104085987B (en) * 2014-07-10 2016-02-10 中国科学院生态环境研究中心 Synchronously realize method and the device of sewage denitrification and dephosphorization, excess sludge reduction and reclamation of phosphorus resource
CN104085987A (en) * 2014-07-10 2014-10-08 中国科学院生态环境研究中心 Method and device for synchronously realizing sewage nitrogen and phosphorus removal, residual sludge reduction and phosphorus resource recovery
CN104230109A (en) * 2014-09-23 2014-12-24 哈尔滨工业大学 System and method for treating high-organic-matter-content high-ammonia-nitrogen wastewater by UASB/A/MBBR (upflow anaerobic sludge blanket/anoxic/moving bed biofilm reactor) combined chemical process
CN104492128B (en) * 2014-12-15 2016-02-24 浦华环保有限公司 A kind of complex function preliminary sedimentation tank, system containing this preliminary sedimentation tank and application thereof
CN104492128A (en) * 2014-12-15 2015-04-08 浦华环保有限公司 Compound functional primary settling tank, system containing compound functional primary settling tank and application of system
CN104761054A (en) * 2015-03-19 2015-07-08 叶长兵 Improvement and upgrading method of AO sewage treatment technology
CN104986854A (en) * 2015-07-07 2015-10-21 北京中斯水灵水处理技术有限公司 Sludge backflow control system and method and sewage treatment system
CN104986854B (en) * 2015-07-07 2017-04-05 北京中斯水灵水处理技术有限公司 Sludge reflux control system, method and sewage disposal system
CN104891754A (en) * 2015-07-09 2015-09-09 王洪臣 Wastewater treatment process and wastewater treatment system
CN106565056A (en) * 2016-10-25 2017-04-19 西安建筑科技大学 Method for strengthening biological phosphorus removal of sewage and recycling phosphate resources from sewage
CN106810019A (en) * 2017-02-09 2017-06-09 山东建筑大学 A kind of reinforced phosphor-removing and sludge decrement type sewage treatment process
CN106810019B (en) * 2017-02-09 2020-07-21 山东建筑大学 Enhanced phosphorus removal and sludge reduction type sewage treatment process
CN109574199A (en) * 2018-12-06 2019-04-05 天津市市政工程设计研究院 A kind of system and method improving biochemical reaction processing capacity
CN109607785A (en) * 2018-12-20 2019-04-12 济南大学 A method of it is recycled from A2/O system by-pass flow phosphorus
CN112174433A (en) * 2020-09-25 2021-01-05 重庆港力环保股份有限公司 Method for efficiently removing phosphorus in AO process

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