CN104591498B - Kitchen sewage treatment process - Google Patents
Kitchen sewage treatment process Download PDFInfo
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- CN104591498B CN104591498B CN201510037175.4A CN201510037175A CN104591498B CN 104591498 B CN104591498 B CN 104591498B CN 201510037175 A CN201510037175 A CN 201510037175A CN 104591498 B CN104591498 B CN 104591498B
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- Prior art keywords
- kitchen sewage
- tank
- biogas
- fermentation
- temperature
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F3/02—Aerobic processes
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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
- C02F3/28—Anaerobic digestion processes
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- 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 discloses a kitchen sewage treatment process, which comprises the following steps: the kitchen sewage enters an anaerobic fermentation tank after being homogenized and stirred, and the anaerobic process adopts a high-temperature anaerobic fermentation process to quickly decompose organic matters in the sewage. The outside of the anaerobic tank is provided with a heat-insulating layer and a high-efficiency heat exchanger, so that the temperature of the anaerobic tank is maintained between 55 ℃ plus or minus 3 ℃. The biogas slurry is subjected to full contact oxidation treatment in a jet aeration mode, and then is precipitated and filtered to reach the standard and be discharged. The kitchen sewage treatment process can economically and effectively treat kitchen sewage and simultaneously can generate biogas and other renewable resources for utilization, and the treated discharged water can also be used for car washing and land washing.
Description
Technical field
The invention belongs to sewage treatment area, be specifically related to kitchen sewage processing technology field.
Background technology
Changing food waste integrated treatment has started to pilot in big and medium-sized cities, the whole nation at present, it is scarcely out of swaddling-clothes, though it processes technique various schools of thinkers and full cries, but without an effective immobilized tupe, and in processing procedure, all run into a kitchen sewage process difficult problem: the process process costs having is too high；Some PROCESS FOR TREATMENT amounts are limited；Some technique cannot process qualified discharge at all.
Kitchen sewage belongs to high concentrated organic wastewater, and its characteristic index is as follows: the index of described kitchen sewage is: COD 10000-12000mg/L, and pH value is 4-5, animal and plant fat 2500-3500mg/L, SS 12000-13000mg/L, NH3-N
500-600mg/L.General sewage treatment process cannot process up to standard at all.
Because changing food waste concentrates integrated treatment the most just to start starting, kitchen sewage processes the tupe also not having maturation, the most do not focus on, after being typically all changing food waste pretreatment, after kitchen sewage anaerobic treatment, sewage separation to each municipal sewage plant being processed discharge or being directly diverted to the process of each municipal sewage plant.Because of its high concentration, containing characteristics such as oils and fatss, it is difficult that each municipal sewage plant processes, and even makes its system crash.
Summary of the invention
For the deficiencies in the prior art, it is desirable to provide a kind of kitchen sewage processes technique, to solve the difficult problem that kitchen sewage processes, process for kitchen sewage and a kind of appropriate technique processing method is provided.Kitchen sewage of the present invention process technique can economical, effective process kitchen sewage while, the renewable resource utilizations such as biogas can be produced, the discharge water after process also can be as carwash, be used with washing.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is:
A kind of kitchen sewage processes technique, comprises the following steps:
(1) kitchen sewage enters regulating reservoir after oil removing pretreatment and carries out homogenizing stirring；
(2) entrance high temperature anaerobic of lowering the temperature after homogenizing stirring is sent out tank and is carried out high-temperature anaerobic fermentation, controlling fermentation jar temperature is 52 DEG C-58 DEG C, control the pH value of fermentation tank between 7.0-8.0, in control fermentation tank, the content ratio of VFA and total alkalinity is less than 0.3, and the high-temperature anaerobic fermentation tank time of staying is 22-27 days；High-temperature anaerobic fermentation processes and produces biogas and fermentation liquid；
(3) described fermentation liquid enters surge tank buffering, then carries out solid-liquid separation, obtains biogas residue and biogas slurry；
(4) described biogas slurry produces mud scum and treatment fluid by air-flotation process, and mud scum returns high-temperature anaerobic fermentation tank recycling or enters surge tank solid-liquid separation again；
(5) described treatment fluid is cooled to less than 35 DEG C by promoting pond by muddy water exchanger, uses jet-flow aeration to carry out Aerobic Process for Treatment subsequently into Aeration tank, and control aeration tank dissolved oxygen concentration is between 1.5mg/L-2.5mg/L, and the time of staying of Aeration tank is 12-18 days；
(6) carry out after Aerobic Process for Treatment precipitating, sand filtration, qualified discharge after membrane filtration.
The temperature of step (1) controls preferably between 55 DEG C-70 DEG C.
The biogas residue that the biogas preferably produced step (2) and step (3) produce all recycles.
Step (6) precipitation process produces mud, and described mud is preferably recycled to Aeration tank recycling.
The present invention will be further explained below:
Kitchen sewage is high concentration organic sewage, by temperature higher (about 70 DEG C) after conventional oil removal treatment, though this sewage intractability is big, but is also the fine source material of twice laid product biogas.Comprehensive above feature, uses thermophilic digestion technology to carry out preposition process relatively reasonable, and Organic substance fast decoupled during thermophilic digestion produces substantial amounts of biogas, and biogas regathers purification comprehensive utilization.The Organic substance that sewage is decomposed possibly together with part the most completely by after date during thermophilic digestion one section, by centrifuge dehydration solid-liquid separation, partly Organic substance is together taken away with mud with solids, mud redevelopment utilizes；Part enters biogas slurry, and biogas slurry is through air-flotation process, and biogas slurry temperature now also has about 50 DEG C；In order to reach the optimum temperature of Aerobic Process for Treatment, muddy water heat exchanger is set in the front end in aerobic aeration pond and lowers the temperature by material.Biogas slurry after cooling enters sedimentation tank precipitation process in aerobic aeration pond after fully oxidized; for preventing the aerobic strain of Aeration tank to run off; part mud in sedimentation tank is by inhaling mud scraper returning aeration pond; process water after precipitation can add medicament in filtrate tanks; difficult degradation thing in advanced water treatment; by sand filtration, filter wherein after a material thing (also for the service life of protection aftertreatment technology film) guarantee treatment effect by membrane filtration again, then qualified discharge.
Compared with prior art, present invention have an advantage that
1, the present invention is while effectively processing kitchen sewage, can produce substantial amounts of clean energy resource for producing and living with resource regeneration again in processing procedure.
2, the present invention's, it is crucial that have employed thermophilic digestion and jet Aeration Technology and Its, has the beneficial effect that the heat exchange difficulty that (1) can inflate the after-heat utilizing pretreatment oil removing unit, avoid high temperature difference.(2) thermophilic digestion organic loading compared with other anaerobic digestion is high, it is big to process the water yield.(3) soon, effectively degrade animal and plant fat, factor of created gase of thermophilic digestion Organic substance decomposition rate is high.(4) thermophilic digestion can kill parasitic ovum and pathogenic bacterium.(5) dewatering performance of sludge can be improved.(5) utilizing jet Aeration Technology and Its, OTR is high, and stirring fully, can reduce waste gas discharge and water smoke produces.
Accompanying drawing explanation
Fig. 1 is the kitchen sewage processing technological flow figure of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further.
Embodiment 1
Kitchen sewage belongs to high concentrated organic wastewater, and its characteristic index is as follows: COD 10000mg/L, and pH value is 4.5, animal and plant fat 3000mg/L, SS 12000mg/L, NH3-N 500mg/L, general sewage treatment process cannot process up to standard at all.
Kitchen sewage is processed by the technique using the present invention:
(1) kitchen sewage enters regulating reservoir after oil removing pretreatment and carries out homogenizing stirring；
(2) enter high temperature anaerobic after homogenizing stirring to send out tank and carry out high-temperature anaerobic fermentation, controlling fermentation jar temperature is 52 DEG C-58 DEG C, control the pH value of fermentation tank between 7.0-8.0, in control fermentation tank, the content ratio of VFA and total alkalinity is less than 0.3, and the high-temperature anaerobic fermentation tank time of staying is 22-27 days；High-temperature anaerobic fermentation processes and produces biogas and fermentation liquid；High-temperature anaerobic fermentation can kill parasitic ovum and pathogenic bacterium with Organic substances such as rapid digestion protein degradation matter and oils and fatss.VFA and total alkalinity ratio are advisable less than 0.3, if ratio is necessary for more than 0.3 to 0.5 reducing load operation.
(3) described fermentation liquid enters surge tank buffering, then carries out solid-liquid separation, obtains biogas residue and biogas slurry；Solid-liquid separation can remove the solid matter of about 90%.
(4) described biogas slurry produces mud scum and treatment fluid by air-flotation process, and mud scum returns high-temperature anaerobic fermentation tank recycling or enters surge tank solid-liquid separation again；Air-flotation process can remove the solid matter of about 5% further.
(5) described treatment fluid is cooled to less than 35 DEG C by promoting pond by muddy water exchanger, uses jet-flow aeration to carry out Aerobic Process for Treatment subsequently into Aeration tank, and control aeration tank dissolved oxygen concentration is between 1.5mg/L-2.5mg/L, and the time of staying of Aeration tank is 12-18 days；OTR is high, and stirring fully, can reduce waste gas discharge and water smoke produces.Aerobic Process for Treatment can remove residual organic substances further.
(6) carry out after Aerobic Process for Treatment precipitating, sand filtration, reach national grade one discharge standard discharge after membrane filtration.
Claims (5)
1. kitchen sewage processes a technique, it is characterized in that, comprises the following steps:
(1) kitchen sewage enters regulating reservoir after oil removing pretreatment and carries out homogenizing stirring；
(2) enter high temperature anaerobic after homogenizing stirring to send out tank and carry out high-temperature anaerobic fermentation, controlling fermentation jar temperature is 52 DEG C-58 DEG C, control the pH value of fermentation tank between 7.0-8.0, in control fermentation tank, the content ratio of VFA and total alkalinity is less than 0.3, and the high-temperature anaerobic fermentation tank time of staying is 22-27 days；High-temperature anaerobic fermentation processes and produces biogas and fermentation liquid；
(3) described fermentation liquid enters surge tank buffering, then carries out solid-liquid separation, obtains biogas residue and biogas slurry；
(4) described biogas slurry produces mud scum and treatment fluid by air-flotation process, and mud scum returns high-temperature anaerobic fermentation tank recycling or enters surge tank solid-liquid separation again；
(5) described treatment fluid is cooled to less than 35 DEG C by promoting pond by muddy water exchanger, uses jet-flow aeration to carry out Aerobic Process for Treatment subsequently into Aeration tank, and control aeration tank dissolved oxygen concentration is between 1.5mg/L-2.5mg/L, and the time of staying of Aeration tank is 12-18 days；
(6) carry out after Aerobic Process for Treatment precipitating, sand filtration, qualified discharge after membrane filtration.
The most according to claim 1, kitchen sewage processes technique, it is characterized in that, the index of described kitchen sewage is: COD 10000-12000mg/L, and pH value is 4-5, animal and plant fat
2500-3500mg/L, SS 12000-13000mg/L, NH3-N 500-600mg/L。
Kitchen sewage the most according to claim 1 or claim 2 processes technique, it is characterized in that, the temperature of step (1) controls between 55 DEG C-70 DEG C.
Kitchen sewage the most according to claim 1 or claim 2 processes technique, it is characterized in that, the biogas residue that the biogas producing step (2) and step (3) produce all recycles.
Kitchen sewage the most according to claim 1 or claim 2 processes technique, it is characterized in that, step (6) precipitation process produces mud, and described mud is recycled to Aeration tank recycling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510037175.4A CN104591498B (en) | 2015-01-23 | 2015-01-23 | Kitchen sewage treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510037175.4A CN104591498B (en) | 2015-01-23 | 2015-01-23 | Kitchen sewage treatment process |
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| Publication Number | Publication Date |
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| CN104591498A CN104591498A (en) | 2015-05-06 |
| CN104591498B true CN104591498B (en) | 2016-08-24 |
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| CN201510037175.4A Active CN104591498B (en) | 2015-01-23 | 2015-01-23 | Kitchen sewage treatment process |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105541421A (en) * | 2016-02-29 | 2016-05-04 | 廖海涛 | Organic waste treatment and biogas slurry concentration and purification system |
| CN106116028A (en) * | 2016-07-22 | 2016-11-16 | 深圳市新岚再生资源有限公司 | A kind of rubbish and the processing method of sewage |
| CN107840530A (en) * | 2017-09-26 | 2018-03-27 | 上海晶宇环境工程股份有限公司 | Kitchen biogas liquor treating process and its special equipment |
| CN108328866B (en) * | 2018-02-27 | 2021-01-05 | 中国农业大学 | Biogas slurry treatment system and method |
| CN112707589A (en) * | 2020-12-18 | 2021-04-27 | 中农新科(苏州)有机循环研究院有限公司 | High-temperature anaerobic resourceful treatment system for kitchen waste leachate |
| CN114538707A (en) * | 2022-02-25 | 2022-05-27 | 湖北中新开维现代牧业有限公司 | High-temperature anaerobic fermentation process for aquaculture wastewater |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2358970C (en) * | 1999-11-08 | 2005-04-05 | Enos L. Stover | Biochemically enhanced thermophilic treatment process |
| CN102260007A (en) * | 2010-05-24 | 2011-11-30 | 营口生物替代能源有限公司 | Industrial treatment method of catering swills |
| CN102351386B (en) * | 2011-09-15 | 2012-10-31 | 吉化集团公司 | Potato type ethanol wastewater treatment method and system |
| CN102603117B (en) * | 2012-03-07 | 2014-11-05 | 江苏兆盛环保集团有限公司 | Treatment method of secondary wastewater of kitchen waste |
| CN102730913A (en) * | 2012-07-11 | 2012-10-17 | 温志明 | Process for treating intermediate-temperate high-concentration high-suspended matter organic wastewater |
| CN103509826B (en) * | 2013-09-24 | 2015-04-15 | 中国科学院成都生物研究所 | Regulation and control method for methane fermentation process |
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Address after: 410000 no.218, section 3, East 2nd Ring Road, Hongshan street, Kaifu District, Changsha City, Hunan Province Patentee after: Hunan Renhe environment Co.,Ltd. Address before: 410000 No. 198, section 3, East 2nd Ring Road, Kaifu District, Changsha City, Hunan Province Patentee before: HUNAN LIANHE KITCHEN WASTE DISPOSAL Co.,Ltd. |