CN101357804B - Low concentration sewage anaerobic treatment process - Google Patents

Low concentration sewage anaerobic treatment process Download PDF

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Publication number
CN101357804B
CN101357804B CN200710012330A CN200710012330A CN101357804B CN 101357804 B CN101357804 B CN 101357804B CN 200710012330 A CN200710012330 A CN 200710012330A CN 200710012330 A CN200710012330 A CN 200710012330A CN 101357804 B CN101357804 B CN 101357804B
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retort
acidication
mixed
water outlet
reaction jar
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CN101357804A (en
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李海波
李晓东
马铮铮
孙铁珩
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Shenyang University
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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M21/00—Bioreactors or fermenters specially adapted for specific uses
    • C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
    • 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
    • C02F3/006—Regulation methods for biological treatment
    • 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
    • C02F3/28—Anaerobic digestion processes
    • C02F3/286—Anaerobic digestion processes including two or more steps
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M23/00—Constructional details, e.g. recesses, hinges
    • C12M23/26—Constructional details, e.g. recesses, hinges flexible
    • 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
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/40—Liquid flow rate
    • 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
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2806—Anaerobic processes using solid supports for microorganisms
    • 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
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2866—Particular arrangements for anaerobic reactors
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The invention relates to a low-concentration domestic sewage anaerobic treatment method and an anaerobic treatment device, the anaerobic treatment method thereof is the two-stage composite anaerobic technology, the main reaction of the first stage is hydrolytic acidification, and the main indicators are controlled as follows: the hydraulic retention time (HRT) in a hydrolytic acidification reaction tank is to be 3.5 to 4.5 hours, the sludge concentration (MLSS) is to be 10 to 12g/L, and the reflux ratio (R) of mixed liquid is to be 1/10 to 1/8. The main reaction of the second stage is methanation, and the main indicators are controlled as follows: the hydraulic retention time (HRT) in the reaction tank is to be 4.0 to 5.5 hours, the sludge concentration (MLSS) is to be 13 to 15g/L, and thereflux ratio (R) of mixed liquid is to be 1/6 to 1/5. The treatment method can obtain the good domestic sewage treatment effect by the regulation of the hydraulic retention time, the sludge concentration, the nutrition allocated proportion, the quantity of reflux and other parameters, thereby realizing the quick start of low influent BOD5 concentration anaerobic treatment.

Description

Low concentration sewage anaerobic treatment process
Technical field: the present invention relates to domestic sewage processing method, particularly low BOD 5The concentration sewage anaerobic treatment process.
Background technology: biological sewage treatment comprises aerobic and two kinds of technologies of anaerobism.Aerobic process short because of its in treatment time, the technology diversity is abundant, technical maturity is as the primary selection of conventional sewage disposal, and the shortcoming of existence is the sludge yield height; The advantage of anaerobic technique is that floor space is little, equipment degree height, sludge yield are low, but the treatment time is long partially, antipollution load impact ability.Mud is as the association product of sewage disposal, and its harm and outlet have become the important criterion of estimating a kind of sewage treatment process quality.Modern sewage disposal more trends towards developing to the sludge reduction direction, and therefore, the little sewage treatment technique of exploitation sludge yield is an inevitable choice.
Sanitary sewage biochemical oxygen demand (BOD) (BOD 5) concentration range is usually at 150-200mg/L, and traditional theory is thought the BOD that is fit to anaerobic treatment 5Concentration threshold is about 500mg/L, and sometimes even up to 800mg/L, so low concentration sewage do not possess the entry condition of anaerobic treatment, is not suitable for carrying out anaerobism and purifies.Large-scale sanitary sewage disposal factory takes anaerobic-aerobic joint technology (as AO, A 2O, ABO etc.) purpose be to remove ammonia nitrogen, why this technology can be implemented, reason is to make its suitable anaerobion breeding on the one hand by adding the trophic structure of special organic nutrient substance modulation sewage, extra on the other hand nutrition has improved the BOD of sewage 5Concentration, so system can start, but required time is longer, and start the less stable of back system.
In order to relax sanitary sewage anaerobic treatment entry condition, tradition is usually taked the method for water quality regulation, that is: sewage mixes with the part high concentrated organic wastewater before entering anaerobic reactor, improves its BOD 5Concentration has been followed high BOD substantially 5The classical theory that the concentration anaerobism starts.But, improve BOD by water quality regulation 5Concentration has additionally increased the gross contamination load of sewage disposal, has artificially improved the sewage disposal scale, has increased processing cost, makes the economic technology reduction of anaerobic treatment.Therefore, though the anaerobic technique sludge yield is few, floor space is little, is advanced water BOD 5The restriction of concentration is used lessly, be badly in need of to improve.
Summary of the invention: the purpose of this invention is to provide a kind of low concentration sewage anaerobic treatment process, this method is at the sanitary sewage BOD of intaking 5Concentration is lower than under the condition of 200mg/L, makes anaerobic reaction be able to quick startup, and steady running, reduces the running cost of starting period, and produces excess sludge hardly.
For realizing purpose of the present invention, at first should design and produce a cover anaerobic processing device.This anaerobic processing device comprises head-tank, acidication retort and produces the methane reaction jar.The bottom of head-tank sets out the mouth of a river, and this water outlet links to each other by the bottom of pipeline with the acidication retort.The top of acidication retort is provided with triphase separator, and a venting port is established at the top of this triphase separator, and a side of this triphase separator sets out the mouth of a river, and the water outlet of the bottom of this water outlet and head-tank is contour.Middle and upper part in the acidication retort is provided with suspension type flexible polypropylene packing layer, and the thickness of this suspension type flexible polypropylene packing layer is 1/6 of acidication retort height.Acidication retort middle part is provided with the mixed-liquor return outlet, and its underpart is provided with the mixed-liquor return import, is connected with rubber hose between mixed-liquor return outlet and the mixed-liquor return import.A mud discharging mouth is established in acidication retort bottom.Water outlet by the triphase separator on acidication retort top links to each other with the bottom of producing the methane reaction jar by pipeline.Produce methane reaction jar top triphase separator is set, a venting port is established at the top of this triphase separator, and a side of this triphase separator is provided with total water outlet, and the suspension type flexible polypropylene packing layer bottom in this total water outlet and the acidication retort is contour.Middle and upper part in producing the methane reaction jar is provided with suspension type flexible polypropylene packing layer, and the thickness of this suspension type flexible polypropylene packing layer is for producing 1/5 of methane reaction jar height; Produce methane reaction jar middle part the mixed-liquor return outlet is set, the bottom is provided with the mixed-liquor return import, is connected with rubber hose between mixed-liquor return outlet and the mixed-liquor return import.Produce the methane reaction pot bottom and establish a mud discharging mouth.Product methane reaction jar diameter is 15 times of acidication retort diameter, and producing the methane reaction tank volume is 3 times of acidication retort volumetrical.
Method of the present invention is:
1, sanitary sewage is injected into head-tank, measures the water quality of sewage.The water-quality guideline that is fit to sewage of the present invention is BOD 5=150～200mg/L, pH=6.5～7.2, COD Cr=450～550mg/L, 5～10 ℃ of water temperatures.
2, open the head-tank flowing water Valve, the sewage in the head-tank enters acidication retort bottom by the water outlet gravity flow.Hydraulic detention time (HRT) in the control hydrolysis acidification reaction jar is 3.5～4.5 hours, and sludge concentration (MLSS) is 10～12g/L, and return current ratio of the mixed liquid (R) is 1/10～1/8.
3, open hydrolysis acidification reaction jar outlet valve, its water outlet gravity flow is entered produce the methane reaction pot bottom.The hydraulic detention time of controlling in this retort (HRT) is 4.0～5.5 hours, and sludge concentration (MLSS) is 13～15g/L, and return current ratio of the mixed liquid (R) is 1/6～1/5.
4, gather water sample at total water outlet, measure effluent index.
Need higher water inlet BOD at the traditional wastewater anaerobic treatment process 5Concentration, start time are long, running cost height in the starting period, problem that surplus sludge volume is big, and the present invention is decomposed into acidication with anaerobic process and produces independently process of two in methane, is provided with the acidication retort and produces the methane reaction jar.Acidication retort and produce the operating parameters of methane reaction jar compares etc. as hydraulic detention time, mixed solution mixed flow and all can realize independent control.Utilize apparatus of the present invention to handle low concentration sewage, the toggle speed of acidication retort and product methane reaction jar is fast, need not additionally to add the microbial nutrition material in starting period, reduced starting period running cost, and acidication retort and product methane reaction jar nearly all do not produce excess sludge, and the treatment effect of total system is better than the traditional wastewater anaerobic treatment process.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The label of each parts is among the figure: 1 for producing methane reaction jar water-in, and 2 is base, and 3 is mud discharging mouth, 4 is the mixed-liquor return import, and 5 is rubber hose, and 6 are the mixed-liquor return outlet, 7 for producing the methane reaction jar, and 8 is suspension type flexible polypropylene packing layer, and 9 is upper end cover, 10 is flange, and 11 is total water outlet, and 12 is triphase separator, 13 is venting port, and 14 is pipeline, and 15 is water outlet, 16 is triphase separator, and 17 is venting port, and 18 is flange, 19 is upper end cover, 20 is head-tank, and 21 is water outlet, and 22 is suspension type flexible polypropylene packing layer, 23 is the acidication retort, 24 is pipeline, and 25 are the mixed-liquor return outlet, and 26 is rubber hose, 27 is water-in, 28 is base, and 29 is the mixed-liquor return import, and 30 is mud discharging mouth.
Embodiment:
See Fig. 1, anaerobic processing device comprises head-tank 20, acidication retort 23 and produces methane reaction jar 7.The bottom of head-tank 20 sets out the mouth of a river 21, and this water outlet 21 links to each other with the bottom of acidication retort 23 by pipeline 24.The top of acidication retort 23 is provided with triphase separator 16, a venting port 17 is established at the top of this triphase separator 16, one side of this triphase separator 16 is established arm water outlet 15, this water outlet 15 is contour with the water outlet 21 of the bottom of head-tank 20, and triphase separator 16 links to each other by flange 18 with acidication retort 23.The upper and lower ends of acidication retort 23 has upper end cover 19 and base 28 respectively.Middle and upper part in acidication retort 23 is provided with suspension type flexible polypropylene packing layer 22, and the thickness of this suspension type flexible polypropylene packing layer 22 is 1/6 of acidication retort 23 height.Acidication retort 23 middle parts are provided with mixed-liquor return outlet 25, and its underpart is provided with mixed-liquor return import 29, are connected with rubber hose 26 between mixed-liquor return outlet 25 and the mixed-liquor return import 29.A mud discharging mouth 30 is established in acidication retort 23 bottoms.Water outlet 15 by the triphase separator 16 on acidication retort 23 tops links to each other with the bottom of producing methane reaction jar 7 by pipeline 14.Produce methane reaction jar 7 tops triphase separator 12 is set, a venting port 13 is established at the top of this triphase separator 12, one side of this triphase separator 12 is provided with total water outlet 11, this total water outlet 11 is contour with suspension type flexible polypropylene packing layer 22 bottoms in the acidication retort 23, and triphase separator 12 links to each other by flange 10 with product methane reaction jar 7.The upper and lower ends that produces methane reaction jar 7 has upper end cover 9 and base 2 respectively, and the middle and upper part in producing methane reaction jar 7 is provided with suspension type flexible polypropylene packing layer 8, and the thickness of this suspension type flexible polypropylene packing layer 8 is for producing 1/5 of methane reaction jar 7 height; Produce methane reaction jar 7 middle parts mixed-liquor return outlet 6 is set, the bottom is provided with mixed-liquor return import 4, is connected with rubber hose 5 between mixed-liquor return outlet 6 and the mixed-liquor return import 4.Produce methane reaction jar 7 bottoms and establish a mud discharging mouth 3.Product methane reaction jar 7 diameters are 1.5 times of acidication retort 23 diameters, and producing methane reaction jar 7 volumes is 3 times of acidication retort 23 volumetrical.
Embodiment one:
1, sanitary sewage is injected into head-tank 20, measures sewage quality.The sewage quality index is BOD 5=192mg/L, pH=7.2, COD Cr=454mg/L, 10 ℃ of water temperatures.
2, open head-tank 20 flowing water Valves, the sewage in the head-tank 20 enters acidication retort 23 bottoms by water outlet 21 gravity flows.Hydraulic detention time in the control hydrolysis acidification reaction jar 23 is 4 hours, and acidication retort 23 return current ratio of the mixed liquid are 1/8.
3, open hydrolysis acidification reaction jar 23 water outlets 15 valves, its water outlet gravity flow is entered produce methane reaction jar 7 bottoms.The hydraulic detention time that control is produced in the methane reaction jar 7 is 5.0 hours, and producing methane reaction jar 7 return current ratio of the mixed liquid is 1/5.
4, gather water sample at total water outlet 11, measure effluent index.Effluent quality: COD Cr=220mg/L (clearance 51.5%), BOD 5=85mg/L (clearance 55.7%), pH=6.2.
Embodiment two:
1, sanitary sewage is injected into head-tank 20, measures sewage quality.The sewage quality index is BOD 5=192mg/L, pH=7.2, COD Cr=454mg/L, 10 ℃ of water temperatures.
2, open head-tank 20 flowing water Valves, the sewage in the head-tank 20 enters acidication retort 23 bottoms by water outlet 21 gravity flows.Hydraulic detention time in the control hydrolysis acidification reaction jar 23 is 4.5 hours, and acidication retort 23 return current ratio of the mixed liquid are 1/9.
3, open hydrolysis acidification reaction jar 23 water outlets 15 valves, its water outlet gravity flow is entered produce methane reaction jar 7 bottoms.The hydraulic detention time that control is produced in the methane reaction jar 7 is 5.2 hours, and producing methane reaction jar 7 return current ratio of the mixed liquid is 1/6.
4, gather water sample at total water outlet, measure effluent index.Effluent quality: COD Cr=216mg/L (clearance 52.4%), BOD 5=83mg/L (clearance 56.8%), pH=6.3.
Embodiment three:
1, sanitary sewage is injected into head-tank 20, measures sewage quality.The sewage quality index is BOD 5=192mg/L, pH=7.2, COD Cr=454mg/L, 10 ℃ of water temperatures.
2, open head-tank 20 flowing water Valves, the sewage in the head-tank 20 enters acidication retort 23 bottoms by water outlet 21 gravity flows.Hydraulic detention time in the control hydrolysis acidification reaction jar 23 is 3.5 hours, and acidication retort 23 return current ratio of the mixed liquid are 1/10.
3, open hydrolysis acidification reaction jar 23 water outlets 15 valves, its water outlet gravity flow is entered produce methane reaction jar 7 bottoms.The hydraulic detention time that control is produced in the methane reaction jar 7 is 4.0 hours, produces methane reaction jar 7 return current ratio of the mixed liquid 1/6.
4, gather water sample at total water outlet, measure effluent index.Effluent quality: COD Cr=233mg/L (clearance 48.7%), BOD 5=97mg/L (clearance 49.5%), pH=6.1.

Claims (1)

1. low concentration sewage anaerobic treatment process is characterized in that: implementing the present invention should have a cover anaerobic processing device, and this anaerobic processing device comprises head-tank, acidication retort and produces the methane reaction jar; The bottom of head-tank sets out the mouth of a river, and this water outlet links to each other by the bottom of pipeline with the acidication retort; The top of acidication retort is provided with triphase separator, and a venting port is established at the top of this triphase separator, and a side of this triphase separator sets out the mouth of a river, and the water outlet of the bottom of this water outlet and head-tank is contour; Middle and upper part in the acidication retort is provided with suspension type flexible polypropylene packing layer, and the thickness of this suspension type flexible polypropylene packing layer is 1/6 of acidication retort height; Acidication retort middle part is provided with the mixed-liquor return outlet, and its underpart is provided with the mixed-liquor return import, is connected with rubber hose between mixed-liquor return outlet and the mixed-liquor return import; A mud discharging mouth is established in acidication retort bottom; Water outlet by the triphase separator on acidication retort top links to each other with the bottom of producing the methane reaction jar by pipeline; Produce methane reaction jar top triphase separator is set, a venting port is established at the top of this triphase separator, and a side of this triphase separator is provided with total water outlet, and the suspension type flexible polypropylene packing layer bottom in this total water outlet and the acidication retort is contour; Middle and upper part in producing the methane reaction jar is provided with suspension type flexible polypropylene packing layer, and the thickness of this suspension type flexible polypropylene packing layer is for producing 1/5 of methane reaction jar height; Produce methane reaction jar middle part the mixed-liquor return outlet is set, the bottom is provided with the mixed-liquor return import, is connected with rubber hose between mixed-liquor return outlet and the mixed-liquor return import; Produce the methane reaction pot bottom and establish a mud discharging mouth; Product methane reaction jar diameter is 1.5 times of acidication retort diameter, and producing the methane reaction tank volume is 3 times of acidication retort volumetrical;
Method of the present invention is:
(1), sanitary sewage is injected into head-tank, the water quality of mensuration sewage; The water-quality guideline that is fit to sewage of the present invention is BOD 5=150～200mg/L, pH=6.5～7.2, COD Cr=450～550mg/L, 5～10 ℃ of water temperatures;
(2), open the head-tank flowing water Valve, the sewage in the head-tank enters acidication retort bottom by the water outlet gravity flow; Hydraulic detention time (HRT) in the control hydrolysis acidification reaction jar is 3.5～4.5 hours, and sludge concentration (MLSS) is 10～12g/L, and return current ratio of the mixed liquid (R) is 1/10～1/8;
(3), open hydrolysis acidification reaction jar outlet valve, its water outlet gravity flow is entered produces the methane reaction pot bottom; The hydraulic detention time of controlling in this retort (HRT) is 4.0～5.5 hours, and sludge concentration (MLSS) is 13～15g/L, and return current ratio of the mixed liquid (R) is 1/6～1/5;
(4), gather water sample at total water outlet, the mensuration effluent index.
CN200710012330A 2007-07-31 2007-07-31 Low concentration sewage anaerobic treatment process Expired - Fee Related CN101357804B (en)

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CN105130120A (en) * 2015-08-27 2015-12-09 安徽科技学院 Novel process for treating domestic sewage by means of biological and ecological combination

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU200308B (en) * 1987-02-04 1990-05-28 Aprilis 4 Gepipari Muevek Gepi Process and apparatus for two-phase anaerob treating waste materials containing floating objects
CN1075472C (en) * 1998-10-23 2001-11-28 清华大学 Two-phase anaerobic membrane-biologic system and process for treatment of waste water
CN1239412C (en) * 2000-11-22 2006-02-01 亚历山大·G·法斯本德 Enhanced biogas production from nitrogen bearing feed stocks
DE102005025508A1 (en) * 2005-06-03 2006-12-07 Rebo Umwelttechnik Gmbh Continuous-biotechnological sludge disintegration of suspended solid in liquid sludge, comprises pre-fermentation; splitting organic macro-molecule; obtaining liquid sludge; transferring split product; aerobic post-treating and recycling

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU200308B (en) * 1987-02-04 1990-05-28 Aprilis 4 Gepipari Muevek Gepi Process and apparatus for two-phase anaerob treating waste materials containing floating objects
CN1075472C (en) * 1998-10-23 2001-11-28 清华大学 Two-phase anaerobic membrane-biologic system and process for treatment of waste water
CN1239412C (en) * 2000-11-22 2006-02-01 亚历山大·G·法斯本德 Enhanced biogas production from nitrogen bearing feed stocks
DE102005025508A1 (en) * 2005-06-03 2006-12-07 Rebo Umwelttechnik Gmbh Continuous-biotechnological sludge disintegration of suspended solid in liquid sludge, comprises pre-fermentation; splitting organic macro-molecule; obtaining liquid sludge; transferring split product; aerobic post-treating and recycling

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