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Industrial and urban mixed sewage stable operation control method

A mixed sewage, stable operation technology, applied in water treatment parameter control, chemical instruments and methods, special compound water treatment, etc., can solve difficult biological treatment system protection, effective prediction of industrial wastewater toxicity impact, toxicity analysis stability needs to be improved and other problems, to achieve the effects of not being able to objectively reflect microbial activity, good promotion and application prospects, and simple methods

Active Publication Date: 2018-08-17
TONGJI UNIV
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  • Application Information

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Problems solved by technology

However, since there is often no direct correlation between the above-mentioned monitoring indicators and the toxic effects of industrial wastewater, these monitoring and control technologies cannot effectively predict the toxic impact of industrial wastewater, making it difficult to effectively monitor the biological treatment system. Protect
[0004] In terms of water quality toxicity detection technology, the utility model patent CN 20179601U discloses a multi-channel biosensing device for water quality toxicity detection, which can select and immobilize different toxicity-sensitive strains or mixed bacteria to determine the toxicity of pollutants or pollution sources. Evaluation has the advantages of wide range of pollutants in toxicity detection, simple operation, no interference from sample chromaticity and turbidity, and more objective and authentic toxicity test results. It can be very suitable for the needs of acute toxicity analysis of sewage treatment plant water quality, but The stability of the biosensor toxicity analysis still needs to be improved

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  • Industrial and urban mixed sewage stable operation control method
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Experimental program
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Effect test

Embodiment 1

[0025] (1) Activated carbon-combined activated sludge cultivation: 2.0 mL of aerobic activated sludge mixture was directly taken from the biological aeration tank of a sewage treatment plant in Shanghai and inoculated into 30 mL of beef extract-peptone culture solution, and incubated at 37 °C and 200 r After shaking and culturing for 24 hours, add 5.0 g of coconut shell powdered activated carbon, mix evenly, filter through a 0.45um microporous membrane, and store in a refrigerator at 4°C until use, denoted as A.

[0026] (2) Zeolite composite nitrifying bacteria culture: Take 5.0 mL of aerobic activated sludge mixture directly from the biological aeration tank of a sewage treatment plant in Shanghai and inoculate it into a sterile Erlenmeyer flask containing 30 mL of nitrifying bacteria enrichment medium medium, 28°C constant temperature and dark culture until NO 3 - When the formation rate of -N reaches 92%, add 3.0g of natural zeolite powder, mix evenly, filter through a 0....

Embodiment 2

[0029] In this embodiment, anaerobic / anoxic / aerobic (A 2 / O) Activated sludge denitrification system treats sewage from a sewage plant in Shanghai, A 2 The effective volume of / O reactor is 2.5m 3 , anaerobic: anoxic: aerobic = 1:1:1, the anaerobic zone and the anoxic zone are equipped with agitation, the DO in the aerobic zone is controlled at 2.5mg / L, the sludge reflux ratio is 50%, and the digestate reflux ratio is 100%, the mud age is controlled at 12 days, and a certain urban sewage is used as the treatment object (see Table 1 for influent water quality). At the water inlet end of the reactor, a multi-channel biosensor equipped with a microbial electrode A is set to detect the toxicity of the influent water quality to the activated sludge; at the end of the aerobic reaction tank, a multi-channel biosensor equipped with a microbial electrode B is set, It is used to detect the toxicity of nitrification tank sewage to nitrifying bacteria.

[0030] During the experiment, d...

Embodiment 3

[0034] In this embodiment, anaerobic / anoxic / aerobic (A 2 / O) Activated sludge denitrification system treats sewage from a sewage plant in Shanghai, A 2 The effective volume of / O reactor is 2.5m 3, anaerobic: anoxic: aerobic=1:0.5:1.5, the anaerobic zone and the anoxic zone are equipped with agitation, the DO in the aerobic zone is controlled at 2.5mg / L, the sludge reflux ratio is 50%, and the digestate reflux ratio is 100%, the mud age is controlled at 15 days, and a certain urban sewage is used as the treatment object (see Table 2 for influent water quality). At the water inlet end of the reactor, a multi-channel biosensor equipped with a microbial electrode A is set to detect the toxicity of the influent water quality to the activated sludge; at the end of the aerobic reaction tank, a multi-channel biosensor equipped with a microbial electrode B is set, It is used to detect the toxicity of nitrification tank sewage to nitrifying bacteria.

[0035] During the experiment, ...

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Abstract

The invention relates to an industrial and urban mixed sewage stable operation control method. Activated carbon composite activated sludge and zeolite composite nitrobacterium in a target sewage treatment plant are used as indicator microorganisms to prepare microbial electrodes, and multichannel biosensors are adopted for monitoring toxicity of inflow water quality of the sewage treatment plant and water quality of an aerobic digester to provide basis for prevention and control of impact of toxic substances in industrial wastewater on a biological treatment system, so that energy saving, consumption reduction and operation stability of the industrial and urban mixed sewage treatment plant are guaranteed. The method is simple, cheap and convenient to operate, the defect that traditional chemical monitoring instrument analysis fails to objectively reflect microbial activity is overcome, and a promising popularization and application prospect is achieved.

Description

technical field [0001] The invention relates to a control method for stable operation of industrial and urban mixed sewage. Background technique [0002] With the rapid development of industry, electroplating, metallurgy, chemical industry and other industries have produced a large amount of waste water containing toxic organic matter, heavy metal ions or abnormal pH. Due to the complex water quality, strong toxicity, and low biodegradability of this type of wastewater, it is difficult to treat it biologically alone. Therefore, the mixed treatment of industrial wastewater and urban sewage has become a common measure to solve the difficult problem of industrial wastewater. However, for sewage treatment plants with biological treatment technology as the core, the toxic impact of industrial wastewater on microorganisms is an important factor restricting the improvement of treated water quality. Toxic substances in wastewater can inhibit the specific functions of microorganisms ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30G01N27/327G01N33/18C02F101/20
CPCC02F3/30C02F2101/20C02F2209/001C02F2209/36C02F2305/06G01N27/327G01N33/1866
Inventor 王学江王健李静王鸢刘帆邓曼君赵建夫
Owner TONGJI UNIV
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