CN104261561A - Sequencing batch reactor activated sludge process (SBR) with low yield of sludge and low energy consumption - Google Patents

Sequencing batch reactor activated sludge process (SBR) with low yield of sludge and low energy consumption Download PDF

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Publication number
CN104261561A
CN104261561A CN201410500540.6A CN201410500540A CN104261561A CN 104261561 A CN104261561 A CN 104261561A CN 201410500540 A CN201410500540 A CN 201410500540A CN 104261561 A CN104261561 A CN 104261561A
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China
Prior art keywords
sludge
sewage
sbr
sbr reactor
tank
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CN201410500540.6A
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Chinese (zh)
Inventor
余静
李彬彬
蒋一凡
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Yangzhou University
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Yangzhou University
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/301Aerobic and anaerobic treatment in the same reactor
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/02Biological treatment
    • C02F11/04Anaerobic treatment; Production of methane by such processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/308Biological phosphorus removal
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/20Sludge processing

Abstract

The invention relates to a sewage dephosphorization and denitrification treatment method and relates to a sewage treatment technology. The invention discloses a sequencing batch reactor activated sludge process (SBR) with low energy consumption and low yield of sludge. The process comprises the following steps: sewage after pretreatment and digested sludge refluxed from a sludge digestion tank get into an SBR reaction tank together to perform biochemical reaction; the SBR reaction tank is subject to five basic process steps of water feeding, aeration, precipitation, water drainage and standby according to the time sequence; in the water drainage stage, supernatant fluid after purification is discharged from the SBR reaction tank as outlet water, and the residual sludge is discharged into a sludge concentration tank; the sludge after concentration is discharged into the sludge digestion tank; in the sludge digestion tank, sludge digestion is performed on the concentrated sludge under anaerobic conditions; as for the sludge discharged from the sludge digestion tank, one part of the digested sludge refluxes to the SBR reaction tank, and the other part of the digested sludge is discharged to the outside of the tank for performing sludge dehydration and disposal.

Description

The sequencing batch active sludge of low sludge yield less energy-consumption
Technical field
The invention belongs to a kind of sewage disposal technology, be specifically related to a kind of sewage water treatment method of low sludge yield less energy-consumption.
Background technology
Along with China cities and towns and industrial developing rapidly, wastewater flow rate constantly increases, and needs to build a lot of middle-size and small-size waste water disposal facility.Meanwhile, day by day serious eutrophication problem forces waste water disposal facility to carry out denitrogenation dephosphorizing to waste water further on the basis of organics removal.The composition of trade effluent is more complicated, and kind in waste water of the poisonous and harmful such as aromatic hydrocarbon, halides and hardly degraded organic substance and concentration constantly increase, and the removal problem of these pollutents also comes into one's own day by day.With regard to the economic strength of China, limited fund be utilized to solve the water pollution problems be on the rise, just must research and develop high with utilising efficiency, that less investment, energy consumption are low wastewater treatment practical technique.Sequencing batch reactor activated sludge process, refer to the sewage disposal technology run according to the operation of certain hour sequential batch, english abbreviation is SBR (Sequencing Batch Reactor activated sludge process).Taught systematic study since being applied from 20 century 70s by U.S. lrvine, this technique is simple with its technique, reduces investment outlay, features such as treatment effect is good and day by day by people are paid attention to.The operation of sbr reactor device, is interval in time, arranges in order, generally can be divided into double teacher by operation order, namely intake, reacts, precipitates, draining spoil disposal and idle stage, is called a cycle of operation.This order operates in a reaction tank to go round and begin again and repeatedly carries out, and sewage is just constantly processed.Sbr reactor device integrates equalizing tank, aeration tank and settling tank, have less investment, efficiency high, use advantage that is wide and flexible operation, and can denitrogenation dephosphorizing effectively.Be applicable to the wastewater treatment requirement of multiple different object, because of but a kind of wastewater processing technology of applicable China's national situation, have good application prospect.
Summary of the invention
The object of the invention is the sequencing batch active sludge providing a kind of low sludge yield less energy-consumption, it is characterized in that, by the comprehensive utilization of anaerobic sludge digestion technology and sequencing batch active sludge, nitrogen in efficient removal sewage and phosphorus, greatly reduce sludge yield, improve biogas output, the energy consumption of sewage and sludge treatment can be provided by the recycling of methane gas energy.Specifically comprise the steps:
(1) enter sbr reactor pond through pretreated sewage, the digested sludge simultaneously refluxed by sludge digestion tank enters sbr reactor pond, and sewage and mud form mixed solution in sbr reactor pond; Mixed solution experiences water inlet, aeration, precipitation, draining and standby five basic working procedure in chronological order; At bleeding stage, the supernatant liquor after purification discharges sbr reactor pond as water outlet, and excess sludge discharge is to sludge digestion tank;
(2) in sludge thickener, thickened sludge is disposed to sludge digestion tank and carries out digestion process, and supernatant liquor is back to sewage disinfection treatment;
(3) thickened sludge enters sludge digestion tank, issues raw sludge digestion in the condition of anaerobism; In the mud that sludge digestion tank is discharged, a part of digested sludge is back to sbr reactor pond, and another part digested sludge is discharged outside pond and carried out sludge dewatering and disposal.
In described step 1, sbr reactor pond accepts the sewage come by sewage disinfection treatment, and digested sludge enters sbr reactor pond in fill phase, and organism is degraded by active sludge under the effect of step of reaction aeration; SBR technique provides anoxic (DO=0 in time series, NOx > 0), anaerobism (DO=0, and the envrionment conditions of aerobic (DO > 0) NOx=0), denitrification is realized under making anoxia condition, the excessive picked-up of the nitrated and phosphorus under the release of phosphorus and aerobic condition is realized under anaerobic condition, thus denitrogenation dephosphorizing effectively; Adopt the mode of blast aeration or mechanical aeration, mixed liquor suspended solid, MLSS (MLSS) concentration is 2000 ~ 5000mg/L, and the organism of more than 90% is removed in sbr reactor pond; Sewage and mud carry out mud-water separation at precipitate phase, and supernatant liquor and excess sludge are discharged outside SBR pond at bleeding stage.Sewage disinfection treatment can comprise coarse rack, fine fack, settling pit or remove slag bath etc., in order to remove the larger inorganic particle of the larger suspended substance of volume, floating matter and proportion and grease, to alleviate the burden of SBR technique.
Described step 2 is the methods with gravity concentration or mechanical thickening or floatation thickening, the water ratio of excess sludge is down to less than 97%, greatly reduces the volume of sludge digestion tank.
Described step 3 is excess sludges that in using, temperature or thermophilic digestion are come by sbr reactor pond.The biosolids residence time (sludge age) of digester is 10 days ~ 30 days.The methane gas produced is used for generating, burning boiler, driving device etc. to reclaim wherein contained energy, the electric energy providing sewage work to run and heat energy simultaneously as fuel.
Compared with existing Phosphorus Removal from Municipal Wastewater denitrifying method, the present invention has the following advantages:
1. the present invention adopts return digestion mud to the method in sbr reactor pond, makes more organism in sewage be by anaerobic degradation in sludge digestion tank, thus produces more biogas.
2. the present invention is the distortion of SBR technique, has good dephosphorization and denitrification effect.
3. reclaimed the methane gas energy of generation by modes such as generatings, more than 70% of the required electric energy of the operation of sewage and sludge treatment facilities can be met, because of but the sewage water treatment method of less energy-consumption.
4., because the biogas that anaerobic sludge digestion produces is much higher than conventional sewage water treatment method, so sludge yield of the present invention is also significantly less than conventional method for the treatment of city waste water, have the advantages that sludge yield is low.
Accompanying drawing explanation
Fig. 1 is the sequencing batch active sludge process schematic representation of the low sludge yield of less energy-consumption of the present invention.
Embodiment
The invention provides a kind of sequencing batch active sludge of low sludge yield less energy-consumption.Below in conjunction with Fig. 1 illustrative example, the present invention will be described.
Water inlet is typical urban sewage, and amount of inlet water is 10,000 tons/day.First municipal effluent removes the larger suspended substance of proportion through pre-treatment facilities such as grids, and the digested sludge then and by sludge digestion tank refluxed enters sbr reactor pond, and sewage and mud form mixed solution in sbr reactor pond.Fill phase keeps dissolved oxygen lower than 0.2mg/L, and sewage and mud, under the effect of submersible agitator, fully mix contact; PolyP bacteria in sbr reactor pond by the Phosphurus release in cell out.In step of reaction early stage, at water-filling than 0.3, to provide the nitric nitrogen needed for anti-nitration reaction.Adopt blast aeration and churned mechanically mode to make the sewage in sbr reactor pond and mud fully stir mixing, be beneficial to the carrying out of anti-nitration reaction.In the step of reaction later stage, maintain the dissolved oxygen of aerobic reactor at about 2mg/L, ensure carrying out smoothly of organic biological degradation and nitration reaction in sewage; For strengthening phosphor-removing effect, adding iron trichloride coagulating agent simultaneously, reducing the total phosphorus in process water outlet and suspended sediment concentration.At precipitate phase, the active sludge suspended in mixed solution precipitates and to be separated with water in sbr reactor pond.At bleeding stage, the sewage after clarification discharges system as process water, and excess sludge discharge is to sludge thickener, and the thickened sludge after concentrated enters sludge digestion tank and carries out anaerobic sludge digestion.Sludge digestion adopts mesophilic anaerobic digestion (about 35 DEG C).In sludge digestion tank, the organism in mud under anaerobic, is biogas based on methane and stable mud (digested sludge) by degradation by bacteria; Partial digested sludge reflux is to sbr reactor pond, and partial digested mud carries out sludge disposal by national requirements after dehydration.
The effluent quality of instance processes of the present invention can reach town sewage plant first discharge standard A.When typical urban wastewater influent water quality, the electric energy that the present invention is reclaimed by methane gas can provide the sewage disposal power consumption of more than 70%, sludge yield is 0.09kgVSS/kgBOD, is significantly less than conventional activated sludge treatment process (0.14-0.28kgVSS/kgBOD).

Claims (4)

1. the sequencing batch active sludge of one kind low sludge yield less energy-consumption, it is characterized in that, by the comprehensive utilization of anaerobic sludge digestion technology and sewage sequencing batch active sludge, nitrogen in efficient removal sewage and phosphorus, greatly reduce sludge yield, improve biogas output, the energy consumption of sewage and sludge treatment can be provided by the recycling of methane gas energy.Specifically comprise the steps:
(1) enter sbr reactor pond through pretreated sewage, the digested sludge simultaneously refluxed by sludge digestion tank enters sbr reactor pond, and sewage and mud form mixed solution in sbr reactor pond; Mixed solution experiences water inlet, aeration, precipitation, draining and standby five basic working procedure in chronological order; At bleeding stage, the supernatant liquor after purification discharges sbr reactor pond as water outlet, and excess sludge discharge is to sludge thickener;
(2) in sludge thickener, thickened sludge is disposed to sludge digestion tank and carries out digestion process, and supernatant liquor is back to sewage disinfection treatment;
(3) thickened sludge enters sludge digestion tank, issues raw sludge digestion in the condition of anaerobism; In the mud that sludge digestion tank is discharged, a part of digested sludge is back to sbr reactor pond, and another part digested sludge is discharged outside pond and carried out sludge dewatering and disposal.
2. the sequencing batch active sludge of low sludge yield less energy-consumption according to claim 1, is characterized in that, in described step 3, digested sludge is back to sbr reactor pond by sludge digestion tank; , there is anaerobic digestion in the excess sludge that sbr reactor pond is discharged, produce biogas under the condition of anaerobism in sludge digestion tank.
3. the sequencing batch active sludge of low sludge yield less energy-consumption according to claim 1, is characterized in that, the digested sludge that in described step 1, sbr reactor pond accepts is from step 2; Sewage and digested sludge enter sbr reactor pond in fill phase, and organism is degraded by active sludge under the effect of step of reaction aeration, and sewage and mud carry out mud-water separation at precipitate phase, and supernatant liquor and excess sludge are discharged outside SBR pond at bleeding stage.
4. the sequencing batch active sludge of low sludge yield less energy-consumption according to claim 1, is characterized in that, described step 2 is the methods with gravity concentration or mechanical thickening or floatation thickening, reduces the water ratio of mud.
CN201410500540.6A 2014-09-25 2014-09-25 Sequencing batch reactor activated sludge process (SBR) with low yield of sludge and low energy consumption Pending CN104261561A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104803546A (en) * 2015-03-25 2015-07-29 中国电器科学研究院有限公司 Technology for reducing and recycling treatment of sludge of sewage treatment plant
CN104843866A (en) * 2015-05-11 2015-08-19 扬州大学 Sewage disposal method with low sludge yield and low energy consumption
CN105906054A (en) * 2016-06-13 2016-08-31 扬州市洁源排水有限公司 Low-C/N-ratio cyclic activated sludge technology denitrification process
CN106927862A (en) * 2017-03-30 2017-07-07 合肥金同维低温科技有限公司 A kind of method that sludge of sewage treatment plant prepares insulation material
CN107117704A (en) * 2017-06-28 2017-09-01 扬州大学 The sequencing batch active sludge of low sludge yield

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CN101935136A (en) * 2010-08-02 2011-01-05 余静 Zero energy consumption low sludge yield municipal sewage dephosphorization and denitrification treatment method
CN101973672A (en) * 2010-10-18 2011-02-16 余静 Zero-energy consumption urban sewage dephosphorization treatment method
CN103382051A (en) * 2013-07-06 2013-11-06 北京工业大学 Apparatus and method used for enhancing low-temperature bio-nitrification effects

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030111411A1 (en) * 2000-08-16 2003-06-19 Gunter Lorenz Method for purifying waste water, and purification plant for carrying out said method
CN101935136A (en) * 2010-08-02 2011-01-05 余静 Zero energy consumption low sludge yield municipal sewage dephosphorization and denitrification treatment method
CN101973672A (en) * 2010-10-18 2011-02-16 余静 Zero-energy consumption urban sewage dephosphorization treatment method
CN103382051A (en) * 2013-07-06 2013-11-06 北京工业大学 Apparatus and method used for enhancing low-temperature bio-nitrification effects

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104803546A (en) * 2015-03-25 2015-07-29 中国电器科学研究院有限公司 Technology for reducing and recycling treatment of sludge of sewage treatment plant
CN104803546B (en) * 2015-03-25 2017-02-01 中国电器科学研究院有限公司 Technology for reducing and recycling treatment of sludge of sewage treatment plant
CN104843866A (en) * 2015-05-11 2015-08-19 扬州大学 Sewage disposal method with low sludge yield and low energy consumption
CN105906054A (en) * 2016-06-13 2016-08-31 扬州市洁源排水有限公司 Low-C/N-ratio cyclic activated sludge technology denitrification process
CN106927862A (en) * 2017-03-30 2017-07-07 合肥金同维低温科技有限公司 A kind of method that sludge of sewage treatment plant prepares insulation material
CN107117704A (en) * 2017-06-28 2017-09-01 扬州大学 The sequencing batch active sludge of low sludge yield

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Application publication date: 20150107