CN103833133A - Method for treating domestic wastewater based on kitchen waste hydrolytic acidizing fluid - Google Patents
Method for treating domestic wastewater based on kitchen waste hydrolytic acidizing fluid Download PDFInfo
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- CN103833133A CN103833133A CN201410080898.8A CN201410080898A CN103833133A CN 103833133 A CN103833133 A CN 103833133A CN 201410080898 A CN201410080898 A CN 201410080898A CN 103833133 A CN103833133 A CN 103833133A
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Abstract
The invention discloses a method for treating domestic wastewater based on a kitchen waste hydrolytic acidizing fluid. The method comprises the following steps: performing hydrolytic fermentation on kitchen waste first and treating the fermented kitchen waste through a centrifugal separating device to obtain a hydrolytic acidizing fluid; subsequently adding denitrified sludge into an SBR (sequencing batch reactor), maintaining the concentration of the sludge to be 2000mg/L and adding the domestic wastewater of which the volume is half of that of the reactor for continuous aeration; after the aeration is ended, adding the kitchen waste hydrolytic acidizing fluid into water as a carbon source, regulating the COD/NO3-N ratio to be 6, and performing a denitrification reaction for 6 hours to ensure that the indexes of various pollutants in the water discharged from the reactor meet the emission requirements. The method disclosed by the invention can be used for effectively solving the problem of deficiency of carbon sources of a sewage plant and is low in operating cost.
Description
Technical field
The invention belongs to technical field of sewage, be specifically related to a kind of method of processing sanitary sewage based on food waste hydrolysis acidifying liquid.
Background technology
Along with the raising of wastewater treatment in China factory total nitrogen concentration emission standard, domestic city sewage exists the too low problem of carbon-nitrogen ratio in denitrification process progressively to expose.And in China's Sewage Plant operational process, the expense of additional carbon has accounted for the more than 50% of overall running cost.The most widely used additional carbon is methyl alcohol at present, although operating performance is better because it has toxicity and expensive feature, causes cost of sewage disposal greatly to increase.Therefore finding an additional carbon cheap, that nitric efficiency is high is necessary.
The features such as the acidication liquid that changing food waste anaerobic treatment produces has that organic content is high, biodegradability good, cheap, toxicological harmless effect, adopt its denitrifying carbon source as sewage work, not only can regulate Sewage Plant carbon-nitrogen ratio, improve nitric efficiency, also can solve the problems such as the toxicity causing as carbon source because of employing methyl alcohol is high, processing cost is expensive, both can meet the demand of Sewage Plant for additional carbon, also can effectively process changing food waste.
How food waste hydrolysis acidifying liquid is used as to denitrifying carbon source, also there is no Patents and research report both at home and abroad.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of method of processing sanitary sewage based on food waste hydrolysis acidifying liquid, can effectively solve Sewage Plant carbon source problem in short supply.
In order to achieve the above object, the technical scheme that the present invention takes is:
A method of processing sanitary sewage based on food waste hydrolysis acidifying liquid, comprises the following steps:
The first step, produce the fermentation that is hydrolyzed of methane mud by adding anaerobism under the condition that changing food waste is 6 at 35 ℃, pH, solid content is 100g/L, the volume ratio that changing food waste and anaerobism are produced methane mud is 15:4, and fermentation changing food waste later obtains the acidication liquid of the voltaile fatty acid that is rich in acetic acid, propionic acid, butyric acid, valeric acid and ethanol through centrifugal separating device;
Second step adds denitrification mud in sequence batch (sbr reactor device, and maintaining sludge concentration is 2000mg/L, and adds the sanitary sewage of reactor volume half amount, and now the total nitrogen concentration in reactor sewage is lower than 36mg/L, continuous aeration 16 hours;
The 3rd step, stops after aeration, and in water body, mineralized nitrogen is nitrate nitrogen, measures the concentration of nitrate nitrogen in water body, and in water, adds food waste hydrolysis acidifying liquid to make carbon source, regulates COD/NO
3-N, than to 6, is adjusted to 7～8 by pH when reaction beginning, and temperature is 25 ℃;
The 4th step, carries out anti-nitration reaction, and after 6 hours, reactor water outlet nitrate nitrogen lower than 50mg/L, meets emission request lower than 3.0mg/L, COD lower than 0.05mg/L, ammonia nitrogen lower than 0.2mg/L, nitrite nitrogen.
Tool of the present invention has the following advantages and high-lighting effect:
1, propose first to utilize food waste hydrolysis acidifying liquid to process the method for sanitary sewage as carbon source.
2, the method is effectively removed ammonia nitrogen, total nitrogen and the COD in sanitary sewage, and reaction can reach the Effluent criteria of 1 grade of A after 6 hours.
3, running cost is low.The raw material of the method is food waste hydrolysis acidifying liquid, with low cost, and has realized utilization of waste material.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1
A method of processing sanitary sewage based on food waste hydrolysis acidifying liquid, comprises the following steps:
The first step, produce the fermentation that is hydrolyzed of methane mud by adding anaerobism under the condition that changing food waste is 6 at 35 ℃, pH, solid content is 100g/L, the volume ratio that changing food waste and anaerobism are produced methane mud is 15:4, in gained acidication liquid, voltaile fatty acid total content is 45000mg/L, COD concentration is 92472mg/L, wherein acetic acid concentration is 15956mg/L, and propionic acid concentration is 15776mg/L, and butyric acid density is 10120mg/L;
Second step, in the sequence batch (sbr reactor device that is 9L at volume, add denitrification mud, maintaining sludge concentration is 2000mg/L, and add the sanitary sewage of 4.5L, now in reactor, ammonia nitrogen concentration is 17.1mg/L, the concentration of nitrate nitrogen is 1.3mg/L, and nitrite nitrogen concentration is 5.7mg/L, continuous aeration 16 hours;
The 3rd step, stops after aeration, and in water body, mineralized nitrogen is nitrate nitrogen, and measuring the concentration of nitrate nitrogen in water body is 22.2mg/L, adds food waste hydrolysis acidifying liquid to make carbon source in water, regulates COD/NO
3-N, than to 6, is adjusted to 7～8 by pH when reaction beginning, and temperature is 25 ℃;
The 4th step, carry out anti-nitration reaction, anti-nitration reaction proceeded to after 1 hour, in water, the concentration of nitrate nitrogen is 0.27mg/L, nitrite nitrogen concentration is 8mg/L, when reaction is after 6 hours, reactor water outlet nitrate nitrogen is that 0.1mg/L, nitrite nitrogen 0mg/L, ammonia nitrogen 2.6mg/L, COD are 20.5mg/L, meets emission request.
The present embodiment has effectively been processed sanitary sewage, and the water-quality guideline such as COD, ammonia nitrogen all reach emission standard.
Embodiment 2
A method of processing sanitary sewage based on food waste hydrolysis acidifying liquid, comprises the following steps:
The first step, produce the fermentation that is hydrolyzed of methane mud by adding anaerobism under the condition that changing food waste is 6 at 35 ℃, pH, solid content is 100g/L, the volume ratio that changing food waste and anaerobism are produced methane mud is 15:4, in gained acidication liquid, voltaile fatty acid total content is 45000mg/L, COD concentration is 92472mg/L, wherein acetic acid concentration is 15956mg/L, and propionic acid concentration is 15776mg/L, and butyric acid density is 10120mg/L;
Second step, in the sequence batch (sbr reactor device that is 9L at volume, add denitrification mud, maintaining sludge concentration is 2000mg/L, and add the sanitary sewage of 4.5L, now in reactor, ammonia nitrogen concentration is 17.0mg/L, the concentration of nitrate nitrogen is 0.77mg/L, and nitrite nitrogen concentration is 3.09mg/L, continuous aeration 16 hours;
The 3rd step, stops after aeration, and in water body, mineralized nitrogen is nitrate nitrogen, and measuring the concentration of nitrate nitrogen in water body is 27.5mg/L, adds food waste hydrolysis acidifying liquid to make carbon source in water, regulates COD/NO
3-N, than to 6, is adjusted to 7～8 by pH when reaction beginning, and temperature is 25 ℃;
The 4th step, carry out anti-nitration reaction, anti-nitration reaction proceeded to after 1 hour, in water, the concentration of nitrate nitrogen is 1.7mg/L, nitrite nitrogen concentration is 14.9mg/L, when reaction is after 6 hours, reactor water outlet nitrate nitrogen is that 0.2mg/L, nitrite nitrogen 0.04mg/L, ammonia nitrogen 0mg/L, COD are 34.7mg/L, meets emission request.
The present embodiment has effectively been processed sanitary sewage, and the water-quality guideline such as COD, ammonia nitrogen all reach emission standard.
Embodiment 3
A method of processing sanitary sewage based on food waste hydrolysis acidifying liquid, comprises the following steps:
The first step, produce the fermentation that is hydrolyzed of methane mud by adding anaerobism under the condition that changing food waste is 6 at 35 ℃, pH, solid content is 100g/L, the volume ratio that changing food waste and anaerobism are produced methane mud is 15:4, in gained acidication liquid, voltaile fatty acid total content is 45000mg/L, COD concentration is 92472mg/L, wherein acetic acid concentration is 15956mg/L, and propionic acid concentration is 15776mg/L, and butyric acid density is 10120mg/L;
Second step, in the sequence batch (sbr reactor device that is 9L at volume, add denitrification mud, maintaining sludge concentration is 2000mg/L, and add the sanitary sewage of 4.5L, now in reactor, ammonia nitrogen concentration is 33.8mg/L, the concentration of nitrate nitrogen is 0.6mg/L, and nitrite nitrogen concentration is 0.05mg/L, continuous aeration 16 hours;
The 3rd step, stops after aeration, and in water body, mineralized nitrogen is nitrate nitrogen, and measuring the concentration of nitrate nitrogen in water body is 35.8mg/L, adds food waste hydrolysis acidifying liquid to make carbon source in water, regulates COD/NO
3-N, than to 6, is adjusted to 7～8 by pH when reaction beginning, and temperature is 25 ℃;
The 4th step, carry out anti-nitration reaction, anti-nitration reaction proceeded to after 1.5 hours, in water, the concentration of nitrate nitrogen is 2.43mg/L, nitrite nitrogen concentration is 14.31mg/L, when reaction is after 6 hours, reactor water outlet nitrate nitrogen is that 0.3mg/L, nitrite nitrogen 0.04mg/L, ammonia nitrogen 3.0mg/L, COD are 41.1mg/L, meets emission request.
The present embodiment has effectively been processed sanitary sewage, and the water-quality guideline such as COD, ammonia nitrogen all reach emission standard.
Claims (4)
1. a method of processing sanitary sewage based on food waste hydrolysis acidifying liquid, is characterized in that, comprises the following steps:
The first step, produce the fermentation that is hydrolyzed of methane mud by adding anaerobism under the condition that changing food waste is 6 at 35 ℃, pH, solid content is 100g/L, the volume ratio that changing food waste and anaerobism are produced methane mud is 15:4, and fermentation changing food waste later obtains the acidication liquid of the voltaile fatty acid that is rich in acetic acid, propionic acid, butyric acid, valeric acid and ethanol through centrifugal separating device;
Second step adds denitrification mud in sequence batch (sbr reactor device, and maintaining sludge concentration is 2000mg/L, and adds the sanitary sewage of reactor volume half amount, and now the total nitrogen concentration in reactor sewage is lower than 36mg/L, continuous aeration 16 hours;
The 3rd step, stops after aeration, and in water body, mineralized nitrogen is nitrate nitrogen, measures the concentration of nitrate nitrogen in water body, and in water, adds food waste hydrolysis acidifying liquid to make carbon source, regulates COD/NO
3-N, than to 6, is adjusted to 7～8 by pH when reaction beginning, and temperature is 25 ℃;
The 4th step, carries out anti-nitration reaction, and after 6 hours, reactor water outlet nitrate nitrogen lower than 50mg/L, meets emission request lower than 3.0mg/L, COD lower than 0.05mg/L, ammonia nitrogen lower than 0.2mg/L, nitrite nitrogen.
2. a kind of method of processing sanitary sewage based on food waste hydrolysis acidifying liquid according to claim 1, is characterized in that, comprises the following steps:
The first step, produce the fermentation that is hydrolyzed of methane mud by adding anaerobism under the condition that changing food waste is 6 at 35 ℃, pH, solid content is 100g/L, the volume ratio that changing food waste and anaerobism are produced methane mud is 15:4, in gained acidication liquid, voltaile fatty acid total content is 45000mg/L, COD concentration is 92472mg/L, wherein acetic acid concentration is 15956mg/L, and propionic acid concentration is 15776mg/L, and butyric acid density is 10120mg/L;
Second step, in the sequence batch (sbr reactor device that is 9L at volume, add denitrification mud, maintaining sludge concentration is 2000mg/L, and add the sanitary sewage of 4.5L, now in reactor, ammonia nitrogen concentration is 17.1mg/L, the concentration of nitrate nitrogen is 1.3mg/L, and nitrite nitrogen concentration is 5.7mg/L, continuous aeration 16 hours;
The 3rd step, stops after aeration, and in water body, mineralized nitrogen is nitrate nitrogen, and measuring the concentration of nitrate nitrogen in water body is 22.2mg/L, adds food waste hydrolysis acidifying liquid to make carbon source in water, regulates COD/NO
3-N, than to 6, is adjusted to 7～8 by pH when reaction beginning, and temperature is 25 ℃;
The 4th step, carry out anti-nitration reaction, anti-nitration reaction proceeded to after 1 hour, in water, the concentration of nitrate nitrogen is 0.27mg/L, nitrite nitrogen concentration is 8mg/L, when reaction is after 6 hours, reactor water outlet nitrate nitrogen is that 0.1mg/L, nitrite nitrogen 0mg/L, ammonia nitrogen 2.6mg/L, COD are 20.5mg/L, meets emission request.
3. a kind of method of processing sanitary sewage based on food waste hydrolysis acidifying liquid according to claim 1, is characterized in that, comprises the following steps:
The first step, produce the fermentation that is hydrolyzed of methane mud by adding anaerobism under the condition that changing food waste is 6 at 35 ℃, pH, solid content is 100g/L, the volume ratio that changing food waste and anaerobism are produced methane mud is 15:4, in gained acidication liquid, voltaile fatty acid total content is 45000mg/L, COD concentration is 92472mg/L, wherein acetic acid concentration is 15956mg/L, and propionic acid concentration is 15776mg/L, and butyric acid density is 10120mg/L;
Second step, in the sequence batch (sbr reactor device that is 9L at volume, add denitrification mud, maintaining sludge concentration is 2000mg/L, and add the sanitary sewage of 4.5L, now in reactor, ammonia nitrogen concentration is 17.0mg/L, the concentration of nitrate nitrogen is 0.77mg/L, and nitrite nitrogen concentration is 3.09mg/L, continuous aeration 16 hours;
The 3rd step, stops after aeration, and in water body, mineralized nitrogen is nitrate nitrogen, and measuring the concentration of nitrate nitrogen in water body is 27.5mg/L, adds food waste hydrolysis acidifying liquid to make carbon source in water, regulates COD/NO
3-N, than to 6, is adjusted to 7～8 by pH when reaction beginning, and temperature is 25 ℃;
The 4th step, carry out anti-nitration reaction, anti-nitration reaction proceeded to after 1 hour, in water, the concentration of nitrate nitrogen is 1.7mg/L, nitrite nitrogen concentration is 14.9mg/L, when reaction is after 6 hours, reactor water outlet nitrate nitrogen is that 0.2mg/L, nitrite nitrogen 0.04mg/L, ammonia nitrogen 0mg/L, COD are 34.7mg/L, meets emission request.
4. a kind of method of processing sanitary sewage based on food waste hydrolysis acidifying liquid according to claim 1, is characterized in that, comprises the following steps:
The first step, produce the fermentation that is hydrolyzed of methane mud by adding anaerobism under the condition that changing food waste is 6 at 35 ℃, pH, solid content is 100g/L, the volume ratio that changing food waste and anaerobism are produced methane mud is 15:4, in gained acidication liquid, voltaile fatty acid total content is 45000mg/L, COD concentration is 92472mg/L, wherein acetic acid concentration is 15956mg/L, and propionic acid concentration is 15776mg/L, and butyric acid density is 10120mg/L;
Second step, in the sequence batch (sbr reactor device that is 9L at volume, add denitrification mud, maintaining sludge concentration is 2000mg/L, and add the sanitary sewage of 4.5L, now in reactor, ammonia nitrogen concentration is 33.8mg/L, the concentration of nitrate nitrogen is 0.6mg/L, and nitrite nitrogen concentration is 0.05mg/L, continuous aeration 16 hours;
The 3rd step, stops after aeration, and in water body, mineralized nitrogen is nitrate nitrogen, and measuring the concentration of nitrate nitrogen in water body is 35.8mg/L, adds food waste hydrolysis acidifying liquid to make carbon source in water, regulates COD/NO
3-N, than to 6, is adjusted to 7～8 by pH when reaction beginning, and temperature is 25 ℃;
The 4th step, carry out anti-nitration reaction, anti-nitration reaction proceeded to after 1.5 hours, in water, the concentration of nitrate nitrogen is 2.43mg/L, nitrite nitrogen concentration is 14.31mg/L, when reaction is after 6 hours, reactor water outlet nitrate nitrogen is that 0.3mg/L, nitrite nitrogen 0.04mg/L, ammonia nitrogen 3.0mg/L, COD are 41.1mg/L, meets emission request.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104276727A (en) * | 2014-09-30 | 2015-01-14 | 清华大学 | Method for deep biological denitrification and removal of COD of leachate |
| CN104324930A (en) * | 2014-11-10 | 2015-02-04 | 合肥工业大学 | Method for producing dissoluble carbon source needed by waste water denitrification from kitchen waste |
| CN109821863A (en) * | 2019-03-28 | 2019-05-31 | 北京科技大学 | A kind of method of percolate and flying ash cooperative disposal |
| CN109942084A (en) * | 2019-03-04 | 2019-06-28 | 西安建筑科技大学 | A kind of device and method of kitchen garbage joint rural domestic sewage treatment |
| CN110615580A (en) * | 2019-09-25 | 2019-12-27 | 江苏泓润生物质能科技有限公司 | Method for using pretreated kitchen waste as denitrification carbon source in sewage treatment |
| CN111517606A (en) * | 2020-05-15 | 2020-08-11 | 同济大学 | Method for strengthening anaerobic digestion of sludge by utilizing acid fermentation of kitchen waste based on isoelectric point |
| CN112979119A (en) * | 2021-02-25 | 2021-06-18 | 同济大学 | High-value treatment system or method for wet garbage in cities and towns |
| CN113149214A (en) * | 2021-04-29 | 2021-07-23 | 上海环境卫生工程设计院有限公司 | Method for facultative and aerobic co-treatment of kitchen waste fermentation liquor and domestic sewage |
| CN113666495A (en) * | 2021-08-26 | 2021-11-19 | 西北工业大学 | Efficient deep denitrification system and method |
| CN113770157A (en) * | 2021-09-03 | 2021-12-10 | 杭州市环境集团有限公司 | Method for preparing sewage carbon source by using kitchen waste and feasibility testing method thereof |
| CN114835250A (en) * | 2022-05-20 | 2022-08-02 | 中国计量大学 | Process method for supplementing carbon source by SBR (sequencing batch reactor) by using kitchen waste phase change liquid |
| CN116022911B (en) * | 2022-12-28 | 2023-08-22 | 物产中大(桐庐)水处理有限公司 | Method for improving biological dephosphorization and denitrification efficiency of low-carbon source sewage |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104276727A (en) * | 2014-09-30 | 2015-01-14 | 清华大学 | Method for deep biological denitrification and removal of COD of leachate |
| CN104324930A (en) * | 2014-11-10 | 2015-02-04 | 合肥工业大学 | Method for producing dissoluble carbon source needed by waste water denitrification from kitchen waste |
| CN109942084A (en) * | 2019-03-04 | 2019-06-28 | 西安建筑科技大学 | A kind of device and method of kitchen garbage joint rural domestic sewage treatment |
| CN109942084B (en) * | 2019-03-04 | 2023-10-20 | 西安建筑科技大学 | Kitchen waste combined rural domestic sewage treatment device and method |
| CN109821863A (en) * | 2019-03-28 | 2019-05-31 | 北京科技大学 | A kind of method of percolate and flying ash cooperative disposal |
| CN109821863B (en) * | 2019-03-28 | 2021-04-06 | 北京科技大学 | Method for cooperative treatment of leachate and incineration fly ash |
| CN110615580A (en) * | 2019-09-25 | 2019-12-27 | 江苏泓润生物质能科技有限公司 | Method for using pretreated kitchen waste as denitrification carbon source in sewage treatment |
| CN111517606B (en) * | 2020-05-15 | 2021-07-27 | 同济大学 | Method for strengthening anaerobic co-digestion by utilizing acid fermentation of kitchen waste based on sludge isoelectric point |
| CN111517606A (en) * | 2020-05-15 | 2020-08-11 | 同济大学 | Method for strengthening anaerobic digestion of sludge by utilizing acid fermentation of kitchen waste based on isoelectric point |
| CN112979119B (en) * | 2021-02-25 | 2022-07-12 | 同济大学 | High-value treatment system or method for wet garbage in cities and towns |
| WO2022178960A1 (en) * | 2021-02-25 | 2022-09-01 | 同济大学 | High-value treatment system or method for urban wet waste |
| CN112979119A (en) * | 2021-02-25 | 2021-06-18 | 同济大学 | High-value treatment system or method for wet garbage in cities and towns |
| CN113149214A (en) * | 2021-04-29 | 2021-07-23 | 上海环境卫生工程设计院有限公司 | Method for facultative and aerobic co-treatment of kitchen waste fermentation liquor and domestic sewage |
| CN113666495A (en) * | 2021-08-26 | 2021-11-19 | 西北工业大学 | Efficient deep denitrification system and method |
| CN113770157A (en) * | 2021-09-03 | 2021-12-10 | 杭州市环境集团有限公司 | Method for preparing sewage carbon source by using kitchen waste and feasibility testing method thereof |
| CN114835250A (en) * | 2022-05-20 | 2022-08-02 | 中国计量大学 | Process method for supplementing carbon source by SBR (sequencing batch reactor) by using kitchen waste phase change liquid |
| CN116022911B (en) * | 2022-12-28 | 2023-08-22 | 物产中大(桐庐)水处理有限公司 | Method for improving biological dephosphorization and denitrification efficiency of low-carbon source sewage |
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