CN114702125B - Inoculation-free activated sludge culture system and method - Google Patents
Inoculation-free activated sludge culture system and method Download PDFInfo
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- CN114702125B CN114702125B CN202210339625.5A CN202210339625A CN114702125B CN 114702125 B CN114702125 B CN 114702125B CN 202210339625 A CN202210339625 A CN 202210339625A CN 114702125 B CN114702125 B CN 114702125B
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- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2101/00—Nature of the contaminant
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2209/00—Controlling or monitoring parameters in water treatment
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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Abstract
A non-inoculation activated sludge culture system and a method thereof relate to the technical field of sewage treatment, wherein a water outlet of a biological pond is connected with a water inlet at the bottom of a sedimentation pond through a pipeline, the bottom of the sedimentation pond is communicated with a water inlet of the biological pond through a sludge pipe, and an air blower is arranged above the biological pond and aerates and oxygenizes in the biological pond through a micropore aeration disc. The activated sludge has the advantages of high quality, strong detergency, and high economic benefit and use value.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a non-inoculation activated sludge culture system and a non-inoculation activated sludge culture method.
Background
Currently, biological treatment technology of activated sludge is often used in sewage treatment systems, the core of the technology is to degrade pollutants by a large amount of microorganisms, and microbial strains need to be cultured before a sewage treatment facility is operated. Usually, activated sludge purchased from other sewage treatment plants is added into a biological pond of the sewage treatment plant and used as inoculated sludge to culture microbial strains, but the culture period is more than 30 days, and the more inoculated sludge is purchased, the shorter the culture period of the sludge in the biological pond is, which brings inconvenience to production.
Although the method for inoculating sludge by adopting a large amount of outsourcing microbial strains is simple and easy, the method has a plurality of defects: (1) and the cost for purchasing the inoculated sludge is too high, so that the enterprise can not bear the sludge easily. Generally, the direct cost for transporting 1.0 ton of inoculated sludge can reach 0.08-0.12 ten thousand yuan, and 80-120 ten thousand yuan is needed for the inoculation cost of a sewage treatment plant for carrying out the ten thousand year transportation by 1.0 ten thousand meters daily, so that the production cost is increased for enterprises. (2) And the property requirement of the inoculated sludge is high. Because the types of each sewage treatment plant are different, the construction purpose, the service range and the treated water quality are different, and the types, the quantities and the attributes of microbial strains are different. The microbial strains of different types of sewage treatment plants cannot be mixed. The outsourcing inoculated sludge must meet the conditions of the same type of enterprises, the same water quality and the same scale, otherwise the outsourcing sludge cannot meet the requirement of sewage treatment. (3) And the culture period is long. The outsourcing inoculation sludge needs to adapt to the operation condition of the current facility after entering a new environment, the long adaptation process is provided, meanwhile, the outsourcing inoculation sludge is more than 6-8 hours because of the loading, unloading and transporting time, strains easily enter the states of stopping activity and self dormancy because of the conditions of oxygen deficiency, hunger and the like, when the outsourcing inoculation sludge is reused, the activation time is long, the culture period is slow, and the requirements of the new environment cannot be adapted immediately.
Therefore, the purchased activated sludge cannot meet the requirement of actual production, and the research of a culture technology of the non-inoculated activated sludge is imperative.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a non-inoculation activated sludge culture system and a non-inoculation activated sludge culture method, which can be used for automatically and quickly culturing activated sludge without adding or purchasing microbial strains, reduce the production cost and meet the production requirements.
In order to realize the aim, the non-inoculated activated sludge culture system comprises a biological tank, a sedimentation tank, a blower and a nutrition adding device; the biological tank is provided with a water inlet and a water outlet, the water outlet of the biological tank is connected with a water inlet at the bottom of the sedimentation tank through a pipeline, and the bottom of the sedimentation tank is communicated with the water inlet of the biological tank through a sludge pipe; an air blower is arranged above the biological tank, a micropore aeration disc is arranged at the bottom in the biological tank, and the air blower aerates and oxygenizes the oxygen in the biological tank through the micropore aeration disc; a nutrition adding device is also arranged at the inlet of the biological pond; the upper water outlet of the sedimentation tank is connected with the next process, and a stop valve is arranged on a sludge pipe of the sedimentation tank.
Further, the method of the non-inoculated activated sludge culture system comprises the following steps,
(1) injecting sewage of a half pool into the biological pool, starting an air blower and aerating and oxygenating through a microporous aeration disc to maintain the dissolved oxygen concentration of the biological pool to be 2-4mg/L, and after the sewage in the biological pool is fully aerated for 72 hours, detecting the concentration of organic pollutants in the water quality in the biological pool to be 100-200 mg/L and entering the step (2);
(2) bottoming, aerating continuously by an air blower, and mixing nitrogen fertilizer and phosphate fertilizer according to the proportion of 5:1, adding the nitrogen fertilizer into the biological pond by using culture adding equipment, wherein the adding amount of the nitrogen fertilizer is 22mg/L multiplied by the volume of water in the biological pond at present, and the adding amount of the phosphate fertilizer is 1/5 of the adding amount of the nitrogen fertilizer; the nitrogen fertilizer is one of urea and biological nitrogen, and the phosphate fertilizer is one of diammonium phosphate and biological phosphorus;
(3) adding a carbon source, and manually adding the carbon source into the biological tank when more foams exist in the biological tank and when free bacteria and ciliate microorganisms appear in microscopic examination, wherein the adding amount of the carbon source is the volume of water in the biological tank multiplied by 22mg/L multiplied by 6.0; the carbon source is glucose and starch;
(4) replenishing sewage, adding a carbon source for 24 hours, detecting the content of organic pollutants in water quality in a biological tank, when the concentration of the organic pollutants is lower than 300mg/L, beginning to replenish sewage to the biological tank, wherein the sewage injection amount is the water volume in the current biological tank (X (300-X1) ÷ X2), and in the formula, X1: the concentration of organic contaminants in the current biological pond water, X2: the concentration of organic contaminants in the influent water;
(5) performing value-added culture, namely increasing the water supply amount to the biological tank when the content of organic pollutants in the water in the biological tank is detected to be lower than 150mg/L, improving the conversion rate of activated sludge, and using the same calculation formula of sewage inlet water as the step (4);
(6) when the biological tank is full of water, mud water automatically flows into a subsequent sedimentation tank, the stop valve is opened, and the sludge in the sedimentation tank flows back to the water inlet of the biological tank through the sludge pipe;
(7) and when the sludge concentration in the biological pond is detected to exceed 0.8g/L, finishing the culture and domestication of the activated sludge strains, and then gradually increasing the water inflow of the system, and when the sludge concentration reaches 1.0-2.0g/L, finishing the culture of the activated sludge.
Compared with the prior art, the non-inoculation activated sludge culture system and the method generate the microbial strains and convert the microbial strains into the activated sludge through the steps of injecting water into the raw water for activation, bottoming, adding a carbon source, supplementing sewage, performing value-added culture, refluxing sludge, completing culture and domestication and the like in the biological pond, overcome the defect that the prior art can only purchase a large amount of microbial strains as the inoculation sludge, have short culture time, only need 7 days from activation, bottoming to sewage supplementation, have the time from value-added culture to training completion of about 7 days, have the accumulated culture period of about 15 days, greatly shorten the time and improve the efficiency of strain culture. The activated sludge has the advantages of high quality, strong detergency, and high economic benefit and use value.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
In the figure, the device comprises a biological tank 1, a micropore aeration disc 2, a sedimentation tank 3, a stop valve 4, a stop valve 5, a sludge pipe 6, a blower 7 and a nutrition adding device.
Detailed Description
As shown in figure 1, the non-inoculated activated sludge culture system comprises a biological pond 1, a sedimentation tank 3, a blower 6 and a nutrition adding device 7; the biological tank 1 is provided with a water inlet and a water outlet, the water outlet of the biological tank 1 is connected with the water inlet at the bottom of the sedimentation tank 3 through a pipeline, and the bottom of the sedimentation tank 3 is communicated with the water inlet of the biological tank 1 through a sludge pipe 5; an air blower 6 is arranged above the biological tank 1, a microporous aeration disc 2 is arranged at the bottom in the biological tank 1, and the air blower 6 aerates and oxygenizes oxygen in the biological tank 1 through the microporous aeration disc 2; a nutrition adding device 7 is also arranged at the inlet of the biological pond 1; the water outlet above the sedimentation tank 3 is connected with the next process, and a sludge pipe 5 of the sedimentation tank 3 is provided with a stop valve 4. The sedimentation tank 3 is one of a radial flow sedimentation tank, a horizontal flow sedimentation tank and a vertical flow sedimentation tank.
Preferably, the method for culturing the system without inoculating the activated sludge comprises the following steps,
(1) injecting half-pool sewage into the biological pool 1, starting the air blower 6, aerating and oxygenating through the microporous aeration disc 2, oxidizing part of organic matters in the sewage by utilizing the aeration oxidation effect to generate carbon dioxide, and simultaneously floating part of macromolecular organic matters in the sewage out of the water surface through the air flotation effect of aeration and adhering to foams on the water surface, so that the content of pollutants in the water is reduced, and the water quality is improved; the aeration oxidation can also eliminate the anoxic and anaerobic bacteria in the water, and selectively retain the aerobic bacteria; maintaining the concentration of dissolved oxygen in the biological tank to be 2-4mg/L, fully aerating the sewage in the biological tank 1 for 72 hours, and entering the step (2) when the concentration of organic pollutants in the water in the biological tank is detected to be 100-200 mg/L;
(2) bottoming, the continuous aeration of air-blower 6, according to 5 with nitrogenous fertilizer and phosphorus fertilizer: 1 is added into the biological pond 1 by the culture adding equipment 7, wherein the adding amount of the nitrogen fertilizer is 22mg/L of the volume of the water in the biological pond, and the adding amount of the phosphate fertilizer is 1/5 of the adding amount of the nitrogen fertilizer; the nitrogen fertilizer is one of urea and biological nitrogen, and the phosphate fertilizer is one of diammonium phosphate and biological phosphorus;
(3) adding a carbon source, and manually adding the carbon source into the biological tank 1 when more foams exist in the biological tank 1 and when free bacteria and ciliate microorganisms appear in microscopic examination, wherein the adding amount of the carbon source is the volume of water in the current biological tank multiplied by 22mg/L multiplied by 6.0; the carbon source is glucose and starch;
(4) replenishing sewage, adding a carbon source for 24 hours, detecting the content of organic pollutants in water quality in a biological tank, when the concentration of the organic pollutants is lower than 300mg/L, beginning to replenish sewage to the biological tank, wherein the injection amount of the sewage is the water volume X (300-X1) divided by X2 in the current biological tank, and in the formula, X1: the concentration of organic contaminants in the current biological pond water, X2: the concentration of organic contaminants in the influent water;
(5) performing value-added culture, namely increasing the water supply amount to the biological tank when the content of organic pollutants in the water in the biological tank is detected to be lower than 150mg/L, improving the conversion rate of activated sludge, and using the same calculation formula of sewage inlet water as the step (4);
(6) when the biological tank is full of water, mud water automatically flows into a subsequent sedimentation tank 3, a stop valve 4 is opened, and the mud in the sedimentation tank 3 flows back to a water inlet of the biological tank 1 through a mud pipe 5;
(7) and when the sludge concentration in the biological pond 1 is detected to exceed 0.8g/L, breaking through a zero threshold value of a sludge strain, completing the culture and domestication of the activated sludge strain, and then gradually increasing the water inflow of the system, and when the sludge concentration reaches 1.0-2.0g/L, finishing the culture of the activated sludge. In actual application, the activated sludge with various concentrations can be cultured according to the requirements of a sewage treatment system.
Claims (1)
1. A method of a non-inoculated activated sludge culture system is characterized in that: comprises a biological tank (1), a sedimentation tank (3), a blower (6) and a nutrition adding device (7); the biological tank (1) is provided with a water inlet and a water outlet, the water outlet of the biological tank (1) is connected with the water inlet at the bottom of the sedimentation tank (3) through a pipeline, and the bottom of the sedimentation tank (3) is communicated with the water inlet of the biological tank (1) through a sludge pipe (5); an air blower (6) is arranged above the biological tank (1), a microporous aeration disc (2) is arranged at the bottom in the biological tank (1), and the air blower (6) aerates and oxygenizes the biological tank (1) through the microporous aeration disc (2); a nutrition adding device (7) is also arranged at the inlet of the biological pond (1); a water outlet above the sedimentation tank (3) is connected with the next working procedure, and a stop valve (4) is arranged on a sludge pipe (5) of the sedimentation tank (3);
the method of the non-inoculated activated sludge culture system comprises the following steps,
(1) injecting half-pool sewage into the biological pool (1), starting the air blower (6) and aerating and oxygenating through the microporous aeration disc (2), maintaining the dissolved oxygen concentration in the pool to be 2-4mg/L, detecting the concentration of organic pollutants in the water quality in the biological pool to be 100-200 mg/L after the sewage in the biological pool (1) is fully aerated for 72 hours, and entering the step (2);
(2) bottoming, air-blower (6) continue the aeration, press nitrogen fertilizer and phosphorus fertilizer according to 5:1 is added into the biological pond (1) through a nutrient adding device (7), wherein the adding amount of the nitrogen fertilizer is equal to the volume of water in the biological pond multiplied by 22mg/L at present, and the adding amount of the phosphate fertilizer is 1/5 of the adding amount of the nitrogen fertilizer; the nitrogen fertilizer is one of urea and biological nitrogen, and the phosphate fertilizer is one of diammonium phosphate and biological phosphorus;
(3) adding a carbon source, and manually adding the carbon source into the biological tank (1) when more foams exist in the biological tank (1) and when free bacteria and ciliate microorganisms appear in microscopic examination, wherein the adding amount of the carbon source is the volume of water in the current biological tank multiplied by 22mg/L multiplied by 6.0; the carbon source is glucose and starch;
(4) replenishing sewage, adding a carbon source for 24 hours, detecting the content of organic pollutants in water quality in a biological tank, when the concentration of the organic pollutants is lower than 300mg/L, beginning to replenish sewage to the biological tank, wherein the sewage injection amount is the water volume in the current biological tank (X (300-X1) ÷ X2), and in the formula, X1: the concentration of organic contaminants in the current biological pond water, X2: the concentration of organic contaminants in the influent water;
(5) performing value-added culture, namely increasing the water supply amount to the biological tank when the content of organic pollutants in the water in the biological tank is detected to be lower than 150mg/L, improving the conversion rate of activated sludge, and using the same calculation formula of sewage inlet water as the step (4);
(6) when the biological tank is filled with water, mud water automatically flows into a subsequent sedimentation tank (3), a stop valve (4) is opened, and the sludge in the sedimentation tank (3) flows back to a water inlet of the biological tank (1) through a sludge pipe (5);
(7) and when the sludge concentration in the biological pond (1) is detected to exceed 0.8g/L, finishing the culture and domestication of the activated sludge strains, subsequently gradually increasing the water inflow of the system, and finishing the culture of the activated sludge when the sludge concentration reaches 1.0-2.0 g/L.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3994802A (en) * | 1975-04-16 | 1976-11-30 | Air Products And Chemicals, Inc. | Removal of BOD and nitrogenous pollutants from wastewaters |
| CN104773828A (en) * | 2015-04-14 | 2015-07-15 | 防城港市动物疫病预防控制中心 | Sewage treatment system of pig farm |
| CN212504905U (en) * | 2020-06-03 | 2021-02-09 | 四川国润和洁环境科技有限公司 | Full-automatic low-temperature and high-altitude microorganism culture and domestication equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1332007C (en) * | 1986-08-06 | 1994-09-13 | Masahiro Fujii | Process for activated-sludge treatment of sewage or industrial waste water |
| CN103803700B (en) * | 2012-11-07 | 2015-06-03 | 北京市市政四建设工程有限责任公司 | Enrichment culture method of activated sludge in sewage treatment plant in plateau alpine region |
| CN103086503B (en) * | 2013-02-26 | 2014-06-25 | 广东新大禹环境工程有限公司 | PACT (powdered activated carbon treatment) process and device, and activated carbon-microbial zoogloea culture method using same |
| CN207002383U (en) * | 2017-08-01 | 2018-02-13 | 广州华浩能源环保集团股份有限公司 | A kind of sewage of low concentration processing system |
| CN215102250U (en) * | 2021-04-19 | 2021-12-10 | 山东建筑大学 | Integrated integrated activated sludge culture reaction device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3994802A (en) * | 1975-04-16 | 1976-11-30 | Air Products And Chemicals, Inc. | Removal of BOD and nitrogenous pollutants from wastewaters |
| CN104773828A (en) * | 2015-04-14 | 2015-07-15 | 防城港市动物疫病预防控制中心 | Sewage treatment system of pig farm |
| CN212504905U (en) * | 2020-06-03 | 2021-02-09 | 四川国润和洁环境科技有限公司 | Full-automatic low-temperature and high-altitude microorganism culture and domestication equipment |
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