CN110550824A - Industrial wastewater biological treatment method - Google Patents
Industrial wastewater biological treatment method Download PDFInfo
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- CN110550824A CN110550824A CN201910861387.2A CN201910861387A CN110550824A CN 110550824 A CN110550824 A CN 110550824A CN 201910861387 A CN201910861387 A CN 201910861387A CN 110550824 A CN110550824 A CN 110550824A
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- sewage
- methane
- treatment method
- biological treatment
- industrial wastewater
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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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
- C02F3/30—Aerobic and anaerobic processes
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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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
the invention discloses a biological treatment method of industrial wastewater, which comprises the following steps: directly injecting industrial sewage into an anaerobic acidification reaction chamber, adding an alkaline substance into the sewage, controlling the pH value of the sewage to be 9-10, adding a proper amount of fermentative anaerobic bacteria into the reaction chamber, fermenting the sewage for 7-14 days in an anaerobic environment, hydrolyzing organic matters in the sewage, and realizing acidification of the sewage, thereby obtaining a large amount of acetic acid; the pressure in the reaction chamber is removed, sewage is introduced into the methane fermentation chamber, a proper amount of anaerobic granular sludge, nutritive salt and methane bacteria are added into the sludge, the sewage is subjected to anaerobic fermentation for 7-14 days in the methane fermentation chamber, methane and carbon dioxide gas can be generated, and methane mixed gas is collected through professional equipment. The biological treatment method of industrial wastewater achieves the purposes of generating green energy, improving the utilization rate of organic matters in the wastewater and reducing the pollution discharge cost.
Description
Technical Field
The invention relates to the technical field of industrial wastewater treatment, in particular to a biological treatment method for industrial wastewater.
Background
the industrial wastewater comprises production wastewater, production sewage and cooling water, and refers to wastewater and waste liquid generated in the industrial production process, wherein the wastewater and the waste liquid contain industrial production materials, intermediate products, byproducts and pollutants generated in the production process, which are lost along with water. The industrial wastewater has various types and complex components. For example, the waste water from electrolytic salt industry contains mercury, the waste water from heavy metal smelting industry contains various metals such as lead and cadmium, the waste water from electroplating industry contains various heavy metals such as cyanide and chromium, the waste water from petroleum refining industry contains phenol, and the waste water from pesticide manufacturing industry contains various pesticides. Because industrial wastewater contains various toxic substances and pollutes the environment, the environment is harmful to human health, so that the industrial wastewater is developed to be comprehensively utilized and turn the harmful into the beneficial, and can be discharged after being treated by adopting corresponding purification measures according to the components and the concentration of pollutants in the wastewater.
At present, harmful substances in industrial wastewater are eliminated through various bacteria, the sewage treatment effect is poor, the sewage treatment cost is high, and the secondary utilization rate of energy in the wastewater is low.
disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a biological treatment method for industrial wastewater, which solves the problems that harmful substances in the industrial wastewater are eliminated through various bacteria, the sewage treatment effect is poor, the sewage treatment cost is high, and the secondary utilization rate of energy in the wastewater is low.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a biological treatment method for industrial wastewater comprises the following steps:
directly injecting industrial sewage into an anaerobic acidification reaction chamber, adding an alkaline substance into the sewage, controlling the pH value of the sewage to be 9-10, adding a proper amount of fermentative anaerobic bacteria into the reaction chamber, fermenting the sewage for 7-14 days in an anaerobic environment, hydrolyzing organic matters in the sewage, and acidifying the sewage to obtain a large amount of acetic acid;
Step two, removing the pressure in the reaction chamber, introducing the sewage into a methane fermentation chamber, adding a proper amount of anaerobic granular sludge, nutritive salt and methane bacteria into the sludge, continuing anaerobic fermentation of the sewage in the methane fermentation chamber for 7-14 days to generate methane and carbon dioxide gas, and collecting methane mixed gas through professional equipment;
continuously fermenting the sewage in the methane fermentation chamber for 8-12 days, discharging the sewage when the methane release amount is close to zero, filtering the fermentation precipitate of the sewage at the bottom of the methane fermentation chamber, and keeping the precipitate in the methane fermentation chamber for the next sewage fermentation;
step four, carrying out chemical oxygen demand detection on the fermented sewage, and introducing the sewage into an aeration tank to improve the oxygen content of the sewage and promote the propagation of aerobic bacteria;
Introducing the aerated sewage into a phosphorization tank, adding phosphorus accumulating bacteria into the phosphorization tank, and synthesizing phosphate in the sewage into polyphosphate by the phosphorus accumulating bacteria in an oxygen-rich environment and storing the polyphosphate in vivo;
and step six, introducing the sewage into a disinfection tank, adding sufficient secondary sodium hypochlorite into the disinfection tank, adding sufficient active carbon into the sewage, adsorbing and disinfecting the sewage, and performing secondary filtration to discharge the sewage.
Preferably, 30-40 kg of alkaline substances are added into each ton of sewage in the step one.
preferably, the temperature for acidifying the sewage in the first step is set to be 40-46 ℃.
Preferably, the volume percentage of the added amount of the anaerobic granular sludge in the second step is 3-5%.
Preferably, the temperature in the methane fermentation chamber in the second step is controlled to be 37-40 ℃.
Preferably, the sediment at the bottom of the methane fermentation chamber can be cleaned out by continuously fermenting the sewage for three times in the third step.
Preferably, the remaining precipitate is subjected to non-hydrolytic screening in the third step, so as to remove plastic non-hydrolytic substances.
Preferably, the sewage in the sixth step is kept still in the disinfection tank for 1-2 days.
preferably, in the sixth step, the chemical oxygen demand detection is performed again on the sewage to be discharged.
(III) advantageous effects
The invention provides a biological treatment method for industrial wastewater. The method has the following beneficial effects:
The biological treatment method for the industrial wastewater comprises the steps of firstly, primarily acidifying the sewage, hydrolyzing organic matters in the sewage into acetic acid, then introducing the sewage into a methane fermentation chamber, hydrolyzing the acetic acid into methane and carbon dioxide again in the methane fermentation chamber, wherein the methane and the carbon dioxide are green emissions, and meanwhile, the methane can be used for life and industrial combustion, and then introducing the sewage into an aeration tank, so that the oxygen content of the sewage is improved, the reproduction of aerobic bacteria is promoted, then introducing the sewage after aeration into a phosphorization tank, synthesizing polyphosphate from phosphate in the sewage, introducing the sewage into a disinfection tank, and after the disinfection is completed, discharging qualified sewage after detection.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example one
A biological treatment method for industrial wastewater comprises the following steps:
Directly injecting industrial sewage into an anaerobic acidification reaction chamber, adding an alkaline substance into the sewage, controlling the pH value of the sewage to be 9-10, adding a proper amount of fermentative anaerobic bacteria into the reaction chamber, fermenting the sewage for 7-14 days in an anaerobic environment, hydrolyzing organic matters in the sewage, and acidifying the sewage to obtain a large amount of acetic acid;
Step two, removing the pressure in the reaction chamber, introducing the sewage into a methane fermentation chamber, adding a proper amount of anaerobic granular sludge, nutritive salt and methane bacteria into the sludge, continuing anaerobic fermentation of the sewage in the methane fermentation chamber for 7-14 days to generate methane and carbon dioxide gas, and collecting methane mixed gas through professional equipment;
continuously fermenting the sewage in the methane fermentation chamber for 8-12 days, discharging the sewage when the methane release amount is close to zero, filtering the fermentation precipitate of the sewage at the bottom of the methane fermentation chamber, and keeping the precipitate in the methane fermentation chamber for the next sewage fermentation;
Step four, carrying out chemical oxygen demand detection on the fermented sewage, and introducing the sewage into an aeration tank to improve the oxygen content of the sewage and promote the propagation of aerobic bacteria;
introducing the aerated sewage into a phosphorization tank, adding phosphorus accumulating bacteria into the phosphorization tank, and synthesizing phosphate in the sewage into polyphosphate by the phosphorus accumulating bacteria in an oxygen-rich environment and storing the polyphosphate in vivo;
And step six, introducing the sewage into a disinfection tank, adding sufficient secondary sodium hypochlorite into the disinfection tank, adding sufficient active carbon into the sewage, adsorbing and disinfecting the sewage, and performing secondary filtration to discharge the sewage.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A biological treatment method for industrial wastewater is characterized by comprising the following steps:
Directly injecting industrial sewage into an anaerobic acidification reaction chamber, adding an alkaline substance into the sewage, controlling the pH value of the sewage to be 9-10, adding a proper amount of fermentative anaerobic bacteria into the reaction chamber, fermenting the sewage for 7-14 days in an anaerobic environment, hydrolyzing organic matters in the sewage, and acidifying the sewage to obtain a large amount of acetic acid;
step two, removing the pressure in the reaction chamber, introducing the sewage into a methane fermentation chamber, adding a proper amount of anaerobic granular sludge, nutritive salt and methane bacteria into the sludge, continuing anaerobic fermentation of the sewage in the methane fermentation chamber for 7-14 days to generate methane and carbon dioxide gas, and collecting methane mixed gas through professional equipment;
Continuously fermenting the sewage in the methane fermentation chamber for 8-12 days, discharging the sewage when the methane release amount is close to zero, filtering the fermentation precipitate of the sewage at the bottom of the methane fermentation chamber, and keeping the precipitate in the methane fermentation chamber for the next sewage fermentation;
Step four, carrying out chemical oxygen demand detection on the fermented sewage, and introducing the sewage into an aeration tank to improve the oxygen content of the sewage and promote the propagation of aerobic bacteria;
Introducing the aerated sewage into a phosphorization tank, adding phosphorus accumulating bacteria into the phosphorization tank, and synthesizing phosphate in the sewage into polyphosphate by the phosphorus accumulating bacteria in an oxygen-rich environment and storing the polyphosphate in vivo;
and step six, introducing the sewage into a disinfection tank, adding sufficient sodium hypochlorite into the disinfection tank, adding sufficient active carbon into the sewage, adsorbing and disinfecting the sewage, and performing secondary filtration to discharge the sewage.
2. The biological treatment method for industrial wastewater according to claim 1, characterized in that: and in the first step, 30-40 kg of alkaline substances are added into each ton of sewage.
3. the biological treatment method for industrial wastewater according to claim 1, characterized in that: the temperature for sewage acidification in the first step is set to be 40-46 ℃.
4. The biological treatment method for industrial wastewater according to claim 1, characterized in that: and in the second step, the adding amount of the anaerobic granular sludge is 3-5% by volume.
5. The biological treatment method for industrial wastewater according to claim 1, characterized in that: and in the second step, the temperature in the methane fermentation chamber is controlled to be 37-40 ℃.
6. The biological treatment method for industrial wastewater according to claim 1, characterized in that: and in the third step, the sewage is continuously fermented for three times, and then the sediment at the bottom of the methane fermentation chamber can be cleaned.
7. The biological treatment method for industrial wastewater according to claim 1, characterized in that: and in the third step, the remained precipitate is screened for non-hydrolyzates, and substances which cannot be hydrolyzed by plastics are removed.
8. the biological treatment method for industrial wastewater according to claim 1, characterized in that: and in the sixth step, the sewage is kept still in the disinfection tank for 1-2 days.
9. The biological treatment method for industrial wastewater according to claim 1, characterized in that: and in the sixth step, the chemical oxygen demand detection is carried out on the sewage to be discharged again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910861387.2A CN110550824A (en) | 2019-09-12 | 2019-09-12 | Industrial wastewater biological treatment method |
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| CN201910861387.2A CN110550824A (en) | 2019-09-12 | 2019-09-12 | Industrial wastewater biological treatment method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8428656D0 (en) * | 1984-11-13 | 1984-12-19 | Biosystem E Ab | Treatment of waste-water |
| US6063273A (en) * | 1996-11-06 | 2000-05-16 | Paques B.V. | Apparatus for the biological purification of waste water |
| CN102765848A (en) * | 2011-05-04 | 2012-11-07 | 李婉 | Treatment process of industrial wastewater from beet sugar industry |
| US20170073259A1 (en) * | 2014-02-05 | 2017-03-16 | Yara International Asa | Reduction of the amount of sulphur compounds in a sulphur compounds contaminated wastewater stream using a granular sludge treatment system |
-
2019
- 2019-09-12 CN CN201910861387.2A patent/CN110550824A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8428656D0 (en) * | 1984-11-13 | 1984-12-19 | Biosystem E Ab | Treatment of waste-water |
| US6063273A (en) * | 1996-11-06 | 2000-05-16 | Paques B.V. | Apparatus for the biological purification of waste water |
| CN102765848A (en) * | 2011-05-04 | 2012-11-07 | 李婉 | Treatment process of industrial wastewater from beet sugar industry |
| US20170073259A1 (en) * | 2014-02-05 | 2017-03-16 | Yara International Asa | Reduction of the amount of sulphur compounds in a sulphur compounds contaminated wastewater stream using a granular sludge treatment system |
Non-Patent Citations (4)
| Title |
|---|
| 刘建伟: "《污水生物处理新技术》", 30 September 2016, 中国建材工业出版社 * |
| 张宝军等: "《水处理工程技术》", 31 January 2015 * |
| 李永峰等: "《环境生物技术：典型厌氧环境微生物过程》", 31 August 2014, 哈尔滨工业大学出版社 * |
| 马文成等: "《水解酸化-两级厌氧废水处理工艺的研究与实践》", 30 June 2018, 哈尔滨工业大学出版社 * |
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Application publication date: 20191210 |
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