CN107364955B - Film forming method of filler for treating domestic sewage - Google Patents
Film forming method of filler for treating domestic sewage Download PDFInfo
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- CN107364955B CN107364955B CN201710640197.9A CN201710640197A CN107364955B CN 107364955 B CN107364955 B CN 107364955B CN 201710640197 A CN201710640197 A CN 201710640197A CN 107364955 B CN107364955 B CN 107364955B
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- domestic 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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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
The invention discloses a biofilm culturing method of a filler for treating domestic sewage, which solves the problem of slow biofilm culturing of domestic sewage treatment equipment, and has the effects of improving the biofilm culturing effect of nitrobacteria and shortening the starting time of the equipment; the technical scheme is as follows: firstly, inoculating activated sludge into a sequencing batch reactor filled with fillers, and aerating for 2 days; then, adding a nutrient, taking static sedimentation for 1 hour, drainage for 0.5 hour, water inlet for 0.5 hour and aeration for 10 hours as an operation period, operating for 2 periods every day, and entering a reversible biofilm culturing stage from irreversible biofilm culturing; changing the operation condition and the sludge concentration, taking static sedimentation for 1h, drainage for 0.5h, water inlet for 0.5h and aeration for 22h as an operation period, operating for 1 period every day, and finishing the biofilm formation process after continuously culturing for several days.
Description
Technical Field
The invention belongs to the technical field of domestic sewage treatment, and particularly relates to a film forming method of a filler for treating domestic sewage.
Background
The biological treatment of sewage is mainly divided into an activated sludge method, a biofilm method and natural biological treatment.
The activated sludge method has unstable operation, needs periodic sludge discharge, is easy to expand sludge, has poor treatment effect on low-concentration sewage, and is not suitable for household domestic sewage treatment equipment; the natural biological treatment mainly comprises a stabilization pond, a slow infiltration system, a fast infiltration system, an earth surface overflow treatment system, a wetland treatment system, an underground infiltration treatment system and the like, has the defects of large floor area, small load and the like, and is not suitable for the treatment of distributed domestic sewage alone; the biomembrane process mainly comprises a biological rotating disk, a biological filter, a biological fluidized bed, biological contact oxidation and the like, and essentially comprises the steps of attaching microorganisms such as heterotrophic bacteria, nitrobacteria and the like on a filter material or a carrier through secreting extracellular polymers and the like, and growing and propagating to form a biomembrane. The method has the advantages of long sludge age, suitability for growth and attachment of strains with long generation period such as nitrobacteria and the like, no sludge bulking problem, strong adaptability to water quality and water quantity change, good settleability of fallen sludge, capability of treating sewage with low concentration, easiness in maintenance operation, energy conservation and the like, and is suitable for treatment of distributed domestic sewage.
At present, rural areas in China have the problems that the carbon removal and denitrification effect of sewage treatment is poor and the effluent quality standards of different areas are difficult to achieve. The reason is that the start-up period of the sewage treatment equipment is long and the normal operation function is difficult to be exerted due to different living habits, water using habits and using numbers of residents in different regions and complex water quality of inlet water.
Therefore, how to shorten the starting time of the sewage treatment equipment taking the biofilm method as the core, ensure the equipment to play the normal operation function in a short time and improve the carbon and nitrogen removal effect of the equipment on the domestic sewage is very important.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a film forming method of a filler for treating domestic sewage, which solves the problem of slow film forming of domestic sewage treatment equipment, and has the effects of improving the film forming effect of nitrobacteria and shortening the starting time of the equipment.
The invention adopts the following technical scheme:
a biofilm culturing method of a filler for treating domestic sewage comprises the following steps:
step 1: inoculating activated sludge into a sequencing batch reactor filled with a filler, aerating for 2 days, degrading original nutrient substances in sludge mixed liquor, enabling microorganisms to be in an endogenous respiration stage, and increasing the contact time of the sludge and a carrier;
step 2: adding a nutrient to promote the growth and the propagation of microorganisms, taking static sedimentation for 1 hour, drainage for 0.5 hour, water inlet for 0.5 hour and aeration for 10 hours as an operation period, operating for 2 periods every day, and entering a reversible biofilm culturing stage from irreversible biofilm culturing;
and step 3: changing the operation condition and the sludge concentration, taking static sedimentation for 1 hour, drainage for 0.5 hour, water inlet for 0.5 hour and aeration for 22 hours as an operation period, operating for 1 period every day, providing sufficient nutrition and oxygen for the biological membrane, maintaining the environmental conditions (temperature, pH and DO) suitable for the living growth of nitrobacteria, improving the attachment of the nitrobacteria, increasing the thickness of the biological membrane and improving the impact load resistance of the biological membrane; and finishing the film forming process after continuously culturing for several days.
Further, in the step 2, the cultivation is continued for 7 days, and the biofilm formation enters a reversible biofilm formation stage from the irreversible biofilm formation.
Further, in step 2, DO is maintained at 4-6mg/L and the temperature is >20 ℃.
Further, in the step 3, the culture is continued for 10 days, and the biofilm formation process is completed.
Further, the nutrient comprises a medicament stock solution and a trace element stock solution, wherein the medicament stock solution comprises sodium acetate (513 mg/L); ammonium chloride, 308mg/L, dipotassium hydrogen phosphate, 220mg/L, calcium chloride dihydrate, 5mg/L and magnesium sulfate heptahydrate, 50 mg/L;
the microelement stock solution comprises FeSO4·7H2O，1g/L；MnSO4·4H2O，4g/L；ZnSO4·7H2O，8.8g/L；CoCl2·6H2O，0.4g/L；H3BO4，0.56g/L；Na2MoO4·2H2O，0.52g/L；CuSO4·5H2O, 0.2g/L and NiCl2·6H2O，0.2g/L。
Furthermore, the filling rate of the filler in the sequencing batch reactor is 50%.
Further, the concentration of the activated sludge in the step 1 is 2000 mg/L.
Further, after the film forming is finished, the film forming filler is added into the solution with the COD of 300mg/L, NH3In the nutrient with-N of 35mg/L, the removal rate of COD and NH of the biofilm carrier filler are detected after continuous aeration3-removal rate of N.
Furthermore, the filling rate of the film forming filler is 50%.
Further, after aeration is carried out for 4 hours, the removal rate of COD is inspected; after 22h of aeration, NH was investigated3-removal rate of N.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts a novel carrier with large specific surface area and good hydrophilicity, which is beneficial to the attachment of a large number of microorganisms and increases the thickness of the biological membrane;
2. the invention adopts a proper nutrient formula, controls different operation parameters and sludge concentration, has high film forming speed and good film forming effect of nitrobacteria, can complete the primary film forming of the carrier after 10 days of operation culture under proper environmental conditions, and obviously improves the film forming efficiency;
3. the invention has simple operation and strong practicability and can shorten the starting time of the equipment.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As introduced by the background art, the prior art has the defect that the biofilm formation of the domestic sewage treatment equipment is slow, and in order to solve the technical problems, the application provides a biofilm formation method of a filler for treating the domestic sewage.
In an exemplary embodiment of the present application, there is provided a biofilm culturing method of a packing for treating domestic sewage, including the steps of:
step 1: adding a proper amount of filler into the sequencing batch reactor, wherein the filling rate is 50%;
step 2: adding a proper amount of activated sludge in an aeration tank of a certain sewage treatment plant into a sequencing batch reactor, wherein the sludge concentration is 2000mg/L, the aeration is carried out for 2 days in a small air quantity, and microorganisms are in an endogenous respiration stage and are in full contact with a carrier;
and step 3: after aeration, adding water containing a nutrient into the sequencing batch reactor, and taking static settling for 1h, draining for 0.5h, feeding water for 0.5h and aeration for 10h (maintaining DO at 4-6mg/L and the temperature at more than 20 ℃) as an operation period, and operating for 2 periods every day; at the initial stage of biofilm formation, the biofilm attached to the surface of the filler is easy to fall off, the culture is continued for 7 days, and the filler biofilm formation enters a reversible biofilm formation stage from irreversible biofilm formation;
wherein, the nutrient comprises a medicament stock solution and a trace element stock solution, and the medicament stock solution comprises sodium acetate 513 mg/L; ammonium chloride, 308 mg/L; dipotassium phosphate, 220 mg/L; calcium chloride dihydrate, 5mg/L and magnesium sulfate heptahydrate, 50 mg/L;
the microelement stock solution comprises FeSO4·7H2O，1g/L；MnSO4·4H2O，4g/L；ZnSO4·7H2O，8.8g/L；CoCl2·6H2O，0.4g/L；H3BO4，0.56g/L；Na2MoO4·2H2O，0.52g/L；CuSO4·5H2O, 0.2g/L and NiCl2·6H2O，0.2g/L。
And 4, step 4: changing the operation condition and the sludge concentration, quickly discharging sludge, adding water distribution containing a nutrient into the sequencing batch reactor, taking static sedimentation for 1 hour, water drainage for 0.5 hour, water inlet for 0.5 hour and aeration for 22 hours as an operation period, operating for 1 period every day, promoting the growth of a biological membrane, increasing the thickness of the biological membrane, continuously culturing for about 10 days, and finishing the primary membrane hanging of a carrier.
And 5: adding biofilm culturing filler into water containing nutritional agent (wherein COD is 300mg/L, NH)335mg/L of-N), the filling rate is 50%, aeration is continued, sampling detection is carried out at certain intervals, and the decarbonization effect and the nitrification effect of the biofilm culturing filler are examined.
The result shows that after aeration is carried out for 4 hours, the removal rate of COD is 100 percent; after aeration for 22h, NH3The removal rate of-N was 86%.
Therefore, the biofilm carrier has better carbon and nitrogen removal effect.
The method solves the problem of slow biofilm formation of the domestic sewage treatment equipment, improves the biofilm formation effect of nitrobacteria, and shortens the start-up period of the equipment; and (3) adding sludge, controlling different operation parameters and sludge concentration, accelerating the nitrobacteria biofilm formation rate and the biomembrane maturation rate, and culturing the biofilm for 10 days to finish primary biofilm formation.
The application is used for sewage treatment equipment, can accelerate equipment starting and improve equipment treatment effect, and is simple, convenient and fast in method and high in feasibility and practicability.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. A biofilm culturing method of a filler for treating domestic sewage is characterized by comprising the following steps:
step 1: inoculating activated sludge into a sequencing batch reactor filled with a filler, and aerating for 2 days;
step 2: adding a nutrient, taking static sedimentation for 1h, drainage for 0.5h, water inlet for 0.5h and aeration for 10h as an operation period, operating for 2 periods every day, and entering a reversible biofilm formation stage from irreversible biofilm formation;
and step 3: changing the operation condition and the sludge concentration, taking static sedimentation for 1h, drainage for 0.5h, water inlet for 0.5h and aeration for 22h as an operation period, operating for 1 period every day, and finishing the biofilm culturing process after continuously culturing for several days; continuously culturing for 10 days to complete the film forming process;
the nutrient comprises a medicament stock solution and a trace element stock solution, wherein the medicament stock solution comprises sodium acetate (513 mg/L); ammonium chloride, 308 mg/L; dipotassium phosphate, 220 mg/L; calcium chloride dihydrate, 5mg/L and magnesium sulfate heptahydrate, 50 mg/L;
the microelement stock solution comprises FeSO4·7H2O，1g/L；MnSO4·4H2O，4g/L；ZnSO4·7H2O，8.8g/L；CoCl2·6H2O，0.4g/L；H3BO4，0.56g/L；Na2MoO4·2H2O，0.52g/L；CuSO4·5H2O, 0.2g/L and NiCl2·6H2O，0.2g/L；
After the film forming is finished, the film forming filler is added into the solution with the COD of 300mg/L, NH3In the nutrient with-N of 35mg/L, after continuous aeration detectionMeasuring COD removal rate and NH of biofilm carrier3-removal rate of N.
2. The biofilm culturing method for the filler used for treating the domestic sewage, according to the claim 1, wherein in the step 2, the culture is continued for 7 days, and the biofilm culturing enters a reversible biofilm culturing stage from the irreversible biofilm culturing.
3. The biofilm culturing method for the filler for treating the domestic sewage of claim 1, wherein in the step 2, DO is maintained at 4-6mg/L and the temperature is more than 20 ℃.
4. The biofilm culturing method of the filler for treating the domestic sewage as recited in claim 1, wherein a packing rate of the filler in the sequencing batch reactor is 50%.
5. The biofilm culturing method for the filler used for treating the domestic sewage according to claim 1, wherein the activated sludge concentration in the step 1 is 2000 mg/L.
6. The biofilm culturing method of the filler for treating the domestic sewage according to claim 1, wherein the filling rate of the biofilm culturing filler is 50%.
7. The biofilm culturing method of the filler for treating the domestic sewage according to claim 1, wherein the removal rate of COD is examined after 4 hours of aeration; after 22h of aeration, NH was investigated3-removal rate of N.
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| CN108217939B (en) * | 2017-12-18 | 2021-04-13 | 桑德生态科技有限公司 | Starting method for treating high ammonia nitrogen wastewater by using anoxic-aerobic moving bed biofilm reaction system |
| CN108892235B (en) * | 2018-08-09 | 2021-07-20 | 南京江岛环境科技研究院有限公司 | Method for improving filler film forming efficiency in water treatment reactor |
| CN110407309A (en) * | 2019-07-26 | 2019-11-05 | 段昶业 | A kind of sanitary sewage disposal biochemistry adjustment method |
| CN113772808A (en) * | 2021-10-11 | 2021-12-10 | 合肥学院 | Method for hanging EPP filler on membrane in biological trickling filter |
| CN115159776A (en) * | 2022-07-05 | 2022-10-11 | 广东轻工职业技术学院 | Printing and dyeing wastewater treatment process |
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| KR100425335B1 (en) * | 2002-01-08 | 2004-03-31 | 주식회사 환경비젼이십일 | Wastewater treatment system using SBBR(Sequencing batch biofilm reactor) and equalization tank |
| CN101468849A (en) * | 2007-12-27 | 2009-07-01 | 北京师范大学 | Method for rapidly cultivating aerobic particle sludge by load control technique |
| CN101665308B (en) * | 2009-09-11 | 2012-02-01 | 广州市市政工程设计研究院 | Method for advanced treatment of landfill leachate |
| CN101913710B (en) * | 2010-08-04 | 2011-10-05 | 中国海洋大学 | Suspended packing microbial quick film forming method |
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| CN102583721B (en) * | 2012-03-12 | 2013-08-21 | 北京化工大学 | Method for culturing load fluctuation tolerant volatile aerobic granule sludge used for low-concentration wastewater |
| CN102583722B (en) * | 2012-03-12 | 2014-03-26 | 北京化工大学 | Immobilized-cultivation method for aerobic granular sludge |
| CN104962505B (en) * | 2015-07-30 | 2018-10-26 | 北京市市政工程设计研究总院有限公司 | The method and device of enrichment culture immobilized nitrobacteria in sewage disposal process |
| CN105548474B (en) * | 2015-12-11 | 2017-04-26 | 安徽工业大学 | Determination method of biochemical characteristic map of microorganism carrier for sewage treatment |
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Effective date of registration: 20181116 Address after: 215500 Text Road of Yushan High-tech Industrial Park, Changshu City, Jiangsu Province Applicant after: JIANGSU ZHONGCHE ENVIRONMENTAL PROTECTION EQUIPMENT Co.,Ltd. Address before: 250101 No. 3666 Century Avenue, Jinan High-tech Zone, Shandong Province Applicant before: SHANDONG CRRC HUATENG ENVIRONMENT Co.,Ltd. |
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Address after: 215500 Text Road of Yushan High-tech Industrial Park, Changshu City, Jiangsu Province Patentee after: Jiangsu CRRC Huateng Environmental Protection Technology Co.,Ltd. Address before: 215500 Text Road of Yushan High-tech Industrial Park, Changshu City, Jiangsu Province Patentee before: JIANGSU ZHONGCHE ENVIRONMENTAL PROTECTION EQUIPMENT Co.,Ltd. |
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