CN104591498A - Kitchen sewage treatment process - Google Patents
Kitchen sewage treatment process Download PDFInfo
- Publication number
- CN104591498A CN104591498A CN201510037175.4A CN201510037175A CN104591498A CN 104591498 A CN104591498 A CN 104591498A CN 201510037175 A CN201510037175 A CN 201510037175A CN 104591498 A CN104591498 A CN 104591498A
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- tank
- kitchen sewage
- treatment process
- sewage treatment
- 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
-
- 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
-
- 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
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Physical Water Treatments (AREA)
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 meal kitchen technical field of sewage.
Background technology
Changing food waste comprehensive treating process starts pilot in national big and medium-sized cities at present, be scarcely out of swaddling-clothes, though its treatment process various schools of thinkers full cries, go back the effective immobilized tupe of neither one, and in treating processes, all run into a meal kitchen sewage disposal difficult problem: the treatment process high cost had; Some art breading amounts are limited; Some technique cannot process qualified discharge at all.
Meal kitchen sewage belongs to high concentrated organic wastewater, and its characteristic index is approximately as follows: the index of described meal kitchen sewage is: COD 10000-12000mg/L, and pH value is 4-5, animal-plant oil 2500-3500mg/L, SS 12000-13000mg/L, NH
3-N 500-600mg/L.General sewage treatment process cannot process up to standard at all.
Because changing food waste concentrates comprehensive treating process just to start starting at home, meal kitchen sewage disposal does not also have ripe tupe, also do not focus on, general is all after changing food waste pre-treatment, after meal kitchen anerobic sowage process, sewage separation being discharged to each municipal sewage plant process or being directly diverted to each municipal sewage plant process.Because of its high density, containing characteristics such as greases, each municipal sewage plant process is difficult, even makes its system crash.
Summary of the invention
For the deficiencies in the prior art, the present invention aims to provide a kind of meal kitchen sewage treatment process, to solve a difficult problem for meal kitchen sewage disposal, for meal kitchen sewage disposal provides a kind of more suitable art treatment.The present invention eats kitchen sewage treatment process can while the sewage of economic, effective process meal kitchen, and can produce the renewable resource utilizations such as biogas, the discharge water after process also can be used as carwash, washes the use on ground.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of meal kitchen sewage treatment process, comprises the following steps:
(1) kitchen sewage of eating enters equalizing tank and carries out homogeneous stirring after oil removing pre-treatment;
(2) homogeneous stir after cooling enter high temperature anaerobic and 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 fermentor tank between 7.0-8.0, the content ratio controlling VFA and total alkalinity in fermentor tank is less than 0.3, and the high-temperature anaerobic fermentation tank residence time is 22-27 days; High-temperature anaerobic fermentation process produces biogas and fermented liquid;
(3) described fermented liquid enters surge tank buffering, then carries out solid-liquid separation, obtains natural pond slag and natural pond liquid;
(4) described natural pond liquid produces mud scum and treatment solution 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 solution is cooled to less than 35 DEG C by promoting pond by muddy water interchanger, then entering aeration tank adopts jet-flow aeration to carry out aerobic treatment, control aeration tank dissolved oxygen concentration between 1.5mg/L-2.5mg/L, the residence time of aeration tank is 12-18 days;
(6) carry out after aerobic treatment precipitating, sand filtration, qualified discharge after membrane filtration.
The temperature of step (1) controls preferably between 55 DEG C-70 DEG C.
The natural pond slag that the biogas preferably produced step (2) and step (3) produce all is recycled.
Step (6) precipitation process produces mud, and described mud is preferably recycled to aeration tank recycling.
The present invention will be further explained below:
Meal kitchen sewage is high concentration organic sewage, by temperature after conventional oil removal treatment higher (about 70 DEG C), though this sewage intractability is large, is also the fine source material that biogas is produced in utilization of waste material.Comprehensive above feature, adopt thermophilic digestion technology to carry out pre-process comparatively rationally, organism fast decoupled in thermophilic digestion process, produces a large amount of biogas, and biogas regathers comprehensive utilization of purifying.Sewage is by after date during thermophilic digestion one section also containing the organism that part is not decomposed completely, and by centrifuge dehydration solid-liquid separation, part organism is together taken away with mud with solids, mud redevelopment utilizes; Part enters natural pond liquid, and natural pond liquid is through air-flotation process, and liquid temperature now in natural pond also has about 50 DEG C; In order to reach the optimum temps of aerobic treatment, muddy water interchanger being set in the front end in aerobic aeration pond and lowering the temperature by material.Natural pond liquid after cooling enters settling tank precipitation process in aerobic aeration pond after fully oxidized; run off for preventing the aerobic bacterial classification in aeration tank; part mud in settling 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, filtering wherein after material thing (also in order to protect the work-ing life of aftertreatment technology film) guarantee treatment effect by membrane filtration again, then qualified discharge.
Compared with prior art, advantage of the present invention is:
1, the present invention is while effective process meal kitchen sewage, again can resource regeneration in treating processes, produce a large amount of clean energies for the production of and life.
2, key of the present invention have employed thermophilic digestion and jet Aeration Technology and Its, and beneficial effect is: the heat exchange difficulty of high temperature difference can be inflated and utilize the surplus heat of pre-treatment oil removing unit, be avoided in (1).(2) thermophilic digestion organic loading compared with other anaerobic digestion is high, to process the water yield large.(3) soon, effectively degrade animal-plant oil, factor of created gase of thermophilic digestion organic substance decomposing speed is high.(4) thermophilic digestion can kill parasitic ovum and pathogenic bacterium.(5) dewatering performance of sludge can be improved.(5) utilize jet Aeration Technology and Its, oxygen transfer rate is high, stirs fully, can reduce exhaust gas emission and water smoke generation.
Accompanying drawing explanation
Fig. 1 is meal kitchen sewage treatment process figure of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described further.
Embodiment 1
Meal kitchen sewage belongs to high concentrated organic wastewater, and its characteristic index is approximately as follows: COD 10000mg/L, and pH value is 4.5, animal-plant oil 3000mg/L, SS 12000mg/L, NH
3-N 500mg/L, general sewage treatment process cannot process up to standard at all.
Technique of the present invention is adopted to process meal kitchen sewage:
(1) kitchen sewage of eating enters equalizing tank and carries out homogeneous stirring after oil removing pre-treatment;
(2) homogeneous enters high temperature anaerobic after stirring and sends 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 fermentor tank between 7.0-8.0, the content ratio controlling VFA and total alkalinity in fermentor tank is less than 0.3, and the high-temperature anaerobic fermentation tank residence time is 22-27 days; High-temperature anaerobic fermentation process produces biogas and fermented liquid; High-temperature anaerobic fermentation can the organism such as rapid digestion degrade proteins and grease, can kill parasitic ovum and pathogenic bacterium.VFA and total alkalinity ratio are less than 0.3 and are advisable, if ratio is greater than 0.3 to 0.5 just must reduce load operation.
(3) described fermented liquid enters surge tank buffering, then carries out solid-liquid separation, obtains natural pond slag and natural pond liquid; Solid-liquid separation can remove the solid matter of about 90%.
(4) described natural pond liquid produces mud scum and treatment solution 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 solution is cooled to less than 35 DEG C by promoting pond by muddy water interchanger, then entering aeration tank adopts jet-flow aeration to carry out aerobic treatment, control aeration tank dissolved oxygen concentration between 1.5mg/L-2.5mg/L, the residence time of aeration tank is 12-18 days; Oxygen transfer rate is high, stirs fully, can reduce exhaust gas emission and water smoke generation.Aerobic treatment can remove residual organic substances further.
(6) carry out after aerobic treatment precipitating, sand filtration, reach national grade one discharge standard discharge after membrane filtration.
Claims (5)
1. a meal kitchen sewage treatment process, is characterized in that, comprise the following steps:
(1) kitchen sewage of eating enters equalizing tank and carries out homogeneous stirring after oil removing pre-treatment;
(2) homogeneous enters high temperature anaerobic after stirring and sends 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 fermentor tank between 7.0-8.0, the content ratio controlling VFA and total alkalinity in fermentor tank is less than 0.3, and the high-temperature anaerobic fermentation tank residence time is 22-27 days; High-temperature anaerobic fermentation process produces biogas and fermented liquid;
(3) described fermented liquid enters surge tank buffering, then carries out solid-liquid separation, obtains natural pond slag and natural pond liquid;
(4) described natural pond liquid produces mud scum and treatment solution 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 solution is cooled to less than 35 DEG C by promoting pond by muddy water interchanger, then entering aeration tank adopts jet-flow aeration to carry out aerobic treatment, control aeration tank dissolved oxygen concentration between 1.5mg/L-2.5mg/L, the residence time of aeration tank is 12-18 days;
(6) carry out after aerobic treatment precipitating, sand filtration, qualified discharge after membrane filtration.
2. eat according to claim 1 kitchen sewage treatment process, it is characterized in that, the index of described meal kitchen sewage is: COD 10000-12000mg/L, and pH value is 4-5, animal-plant oil 2500-3500mg/L, SS 12000-13000mg/L, NH
3-N 500-600mg/L.
3. eat according to claim 1 or 2 kitchen sewage treatment process, it is characterized in that, the temperature of step (1) controls between 55 DEG C-70 DEG C.
4. eat according to claim 1 or 2 kitchen sewage treatment process, it is characterized in that, the natural pond slag that the biogas produce step (2) and step (3) produce all is recycled.
5. to eat according to claim 1 or 2 kitchen sewage treatment process, 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 true CN104591498A (en) | 2015-05-06 |
| CN104591498B CN104591498B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510037175.4A Active CN104591498B (en) | 2015-01-23 | 2015-01-23 | Kitchen sewage treatment process |
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Cited By (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 |
| CN108328866A (en) * | 2018-02-27 | 2018-07-27 | 中国农业大学 | A kind of 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 |
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| WO2001034527A1 (en) * | 1999-11-08 | 2001-05-17 | Stover Enos L | 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 |
| CN102351386A (en) * | 2011-09-15 | 2012-02-15 | 吉化集团公司 | Potato type ethanol wastewater treatment method and system |
| CN102603117A (en) * | 2012-03-07 | 2012-07-25 | 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 |
| CN103509826A (en) * | 2013-09-24 | 2014-01-15 | 中国科学院成都生物研究所 | Regulation and control method for methane fermentation process |
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2015
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2001034527A1 (en) * | 1999-11-08 | 2001-05-17 | Stover Enos L | 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 |
| CN102351386A (en) * | 2011-09-15 | 2012-02-15 | 吉化集团公司 | Potato type ethanol wastewater treatment method and system |
| CN102603117A (en) * | 2012-03-07 | 2012-07-25 | 江苏兆盛环保集团有限公司 | Treatment method of secondary wastewater of kitchen waste |
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Cited By (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 |
| CN108328866A (en) * | 2018-02-27 | 2018-07-27 | 中国农业大学 | A kind of 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 |
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| CN104591498B (en) | 2016-08-24 |
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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. |