CN114702125A - Non-inoculation activated sludge culture system and method - Google Patents
Non-inoculation activated sludge culture system and method Download PDFInfo
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- CN114702125A CN114702125A CN202210339625.5A CN202210339625A CN114702125A CN 114702125 A CN114702125 A CN 114702125A CN 202210339625 A CN202210339625 A CN 202210339625A CN 114702125 A CN114702125 A CN 114702125A
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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
- C02F3/12—Activated sludge 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
- 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
- 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
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/44—Time
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
A culture system and method of active sludge without inoculation relates to the technical field of sewage treatment, a water outlet of a biological pool is connected with a water inlet at the bottom of a sedimentation pool through a pipeline, the bottom of the sedimentation pool is communicated with a water inlet of the biological pool through a sludge pipe, an air blower is arranged above the biological pool and aerates and oxygenizes in the biological pool through a microporous 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 of adopting a large amount of outsourcing microbial strains as the inoculated sludge is simple and easy, the method has a plurality of defects: firstly, the cost for purchasing the inoculated sludge is too high, and the enterprise is difficult to bear. 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. And secondly, the attribute 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. Thirdly, the culture period is long. The outsourcing inoculation sludge is required to adapt to the operation conditions of the current facilities after entering a new environment, a long adaptation process is achieved, meanwhile, the time for loading, unloading and transporting the outsourcing inoculation sludge exceeds 6-8 hours, strains easily enter a state of stopping activity and self dormancy due to the conditions of oxygen deficiency, hunger and the like, and when the outsourcing inoculation sludge is used again, 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,
injecting half pool sewage into a biological tank, starting an air blower and aerating and oxygenating through a microporous aeration disc to maintain the dissolved oxygen concentration in the tank to be 2-4mg/L, and after fully aerating the sewage in the biological tank for 72 hours, detecting that the concentration of organic pollutants in the water quality in the biological tank is 200 mg/L, and entering the second step;
bottoming, continuously aerating by a blower, and mixing nitrogen fertilizer and phosphate fertilizer according to the ratio of 5: 1, adding the fertilizer into a biological pond by using nutrient adding equipment, wherein the adding amount of a nitrogen fertilizer is equal to the volume of water in the biological pond multiplied by 22mg/L, and the adding amount of a 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;
thirdly, adding a carbon source, 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;
supplementing sewage, detecting the content of organic pollutants in water quality in the biological pond after adding a carbon source for 24 hours, and beginning to supplement the sewage to the biological pond when the concentration of the organic pollutants is lower than 300mg/L, wherein the injection amount of the sewage is the water volume X (300-X1) ÷ X2 in the current biological pond, and in the formula, X1: current organic contaminant concentration of the water in the biological pond, X2: the concentration of organic contaminants in the influent water;
step four, 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 a calculation formula of sewage to perform the step four;
sixthly, sludge reflowing, wherein when the biological tank is filled with water, the muddy water automatically flows into a subsequent sedimentation tank, a stop valve is opened, and the sludge in the sedimentation tank reflows to a water inlet of the biological tank through a sludge pipe;
and seventhly, when the sludge concentration in the biological tank 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, 1, a biological pond, 2, a microporous aeration disc, 3, a sedimentation tank, 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; a water outlet above the sedimentation tank 3 is connected with the next process, and a stop valve 4 is arranged on a sludge pipe 5 of the sedimentation tank 3. 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,
injecting half-pool sewage into a biological pool 1, starting an air blower 6, aerating and oxygenating through a microporous aeration disc 2, oxidizing part of organic matters in the sewage to generate carbon dioxide by utilizing the aeration oxidation effect, and simultaneously floating part of macromolecular organic matters in the sewage out of the water surface through the aeration air flotation effect 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 second step when the concentration of organic pollutants in the water in the biological tank is detected to be 100-200 mg/L;
bottoming, continuously aerating by a blower 6, and mixing nitrogen fertilizer and phosphate fertilizer according to the ratio of 5: 1 is added into the biological pond 1 by the culture adding equipment 7, wherein the adding amount of the nitrogen fertilizer is equal to the volume of the water in the biological pond multiplied by 22mg/L, 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;
thirdly, adding a carbon source, manually adding the carbon source into the biological tank 1 when more foams exist in the biological tank 1 and when free bacteria and ciliates are found in microscopic examination, wherein the adding amount of the carbon source is equal to the volume of water in the biological tank multiplied by 22mg/L multiplied by 6.0; the carbon source is glucose and starch;
supplementing sewage, detecting the content of organic pollutants in water quality in the biological pond after adding a carbon source for 24 hours, and beginning to supplement the sewage to the biological pond when the concentration of the organic pollutants is lower than 300mg/L, wherein the injection amount of the sewage is the water volume X (300-X1) ÷ X2 in the current biological pond, and in the formula, X1: current organic contaminant concentration of the water in the biological pond, X2: the concentration of organic contaminants in the influent water;
step four, 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 a calculation formula of sewage to perform the step four;
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 sludge in the sedimentation tank 3 flows back to a water inlet of the biological tank 1 through a sludge pipe 5;
and seventhly, breaking through a zero threshold value of the sludge strain 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 strain, and gradually increasing the water inflow of the system subsequently, wherein the activated sludge culture is finished when the sludge concentration reaches 1.0-2.0 g/L. In actual application, the activated sludge with various concentrations can be cultured according to the requirements of a sewage treatment system.
Claims (2)
1. A non-inoculation 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 process, and a stop valve (4) is arranged on a sludge pipe (5) of the sedimentation tank (3).
2. The method of claim 1, wherein the method comprises the steps of,
injecting half-pool sewage into a biological pool (1), starting an air blower (6) and aerating and oxygenating through a microporous aeration disc (2) to maintain the dissolved oxygen concentration in the pool to be 2-4mg/L, and after the sewage in the biological pool (1) 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 II;
bottoming, continuously aerating by using an air blower (6), and mixing the nitrogen fertilizer and the phosphate fertilizer according to the ratio of 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, 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;
thirdly, adding a carbon source, manually adding the carbon source into the biological tank (1) when more foams exist in the biological tank (1) and when free bacteria and ciliates are found in microscopic examination, wherein the adding amount of the carbon source is equal to the volume of water in the current biological tank multiplied by 22mg/L multiplied by 6.0; the carbon source is glucose and starch;
supplementing sewage, detecting the content of organic pollutants in water quality in the biological pond after adding a carbon source for 24 hours, and beginning to supplement the sewage to the biological pond when the concentration of the organic pollutants is lower than 300mg/L, wherein the injection amount of the sewage is the water volume X (300-X1) ÷ X2 in the current biological pond, and in the formula, X1: current organic contaminant concentration of the water in the biological pond, X2: the concentration of organic contaminants in the influent water;
step four, 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 a calculation formula of sewage to perform the step four;
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 the water inlet of the biological tank (1) through a sludge pipe (5);
and seventhly, 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, 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.
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Citations (8)
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2022
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