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Process method suitable for low-carbon-nitrogen-ratio sewage treatment

A process method and technology for sewage treatment, applied in biological water/sewage treatment, water/sludge/sewage treatment, water treatment parameter control, etc., which can solve the problems of inconvenient operation, substandard effluent, and poor denitrification effect. , to achieve the effect of reducing the number of structures and the land area of ​​the sewage treatment plant, reducing the consumption of organic matter, and reducing the cost of aeration

Pending Publication Date: 2021-12-28
NANKAI UNIV +1
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  • Application Information

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Problems solved by technology

[0002] The sewage of urban sewage treatment plants in my country presents the characteristics of low carbon-to-nitrogen ratio, and the treatment process mostly adopts A 2 / O process, this process has problems such as complex process flow, high energy consumption and material consumption, poor denitrification effect, inconvenient operation, etc., which may easily cause the effluent to fail to meet the standard, resulting in pollutants such as nitrogen, phosphorus, and organic matter entering the receiving water body and causing water body enrichment Nutritization

Method used

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  • Process method suitable for low-carbon-nitrogen-ratio sewage treatment

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Effect test

Embodiment 1

[0042] Example 1: The test device system includes water inlet tank 1, water inlet pump 2, circulation pump 3, air supply equipment 4, regulating valve 5, flow meter 6, pressure gauge 7, integrated membrane block 8, MABR membrane system 9 and outlet pipe 10. A group of integrated membrane blocks 8 are installed in the MABR membrane system 9. The integrated membrane blocks 8 contain MABR membrane components 11 and exhaust valves. The integrated membrane blocks 8 are connected to the gas supply equipment 4 and its auxiliary facilities, and the gas supply equipment 4 is turned on; Take the activated sludge from the aeration tank of the urban sewage treatment plant, add it to the MABR membrane system 9, and use the method of regularly adding ammonia nitrogen and COD to continue the operation, so that the microorganisms are loaded on the surface of the MABR membrane; Nitrate accumulation rate and dissolved oxygen were inoculated with anammox activated sludge, and the circulation pump...

Embodiment 2

[0043] Example 2: 5 MABR modules are implanted in a sewage treatment pool with a low nitrogen removal ratio; according to the above steps, the influent is gradually adjusted to be sewage, the carbon-nitrogen ratio of the influent is less than 1, and the ammonia nitrogen removal efficiency can reach more than 90.81%. The treatment load was 247.15mg N / (L·d).

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Abstract

The invention discloses a process method suitable for low-carbon-nitrogen-ratio sewage treatment. The method comprises a membrane system, a gas supply system, a water inflow and outflow system and a monitoring system; based on reasonable ecological niche distribution of functional microorganisms such as ammonia oxidizing bacteria (AOB), nitrite oxidizing bacteria (NOB), anammox bacteria (ANAMMOX bacteria) and denitrifying bacteria, a partial short-cut nitrification-anaerobic ammonia oxidation membrane aeration bio-membrane reactor (PN / A MABR) is established, and the synergistic denitrification performance of key functional bacteria in an MABR bio-membrane is improved. The PN / A MABR disclosed by the invention has the advantages of simple process, convenience in operation, low energy consumption, low sludge yield and the like, can replace partial functions of an aerobic tank, an anoxic tank and an anaerobic tank in a traditional biological denitrification process, and reduces the number and area of structures.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a process method suitable for low carbon-to-nitrogen ratio sewage treatment. Background technique [0002] The sewage of urban sewage treatment plants in my country presents the characteristics of low carbon-to-nitrogen ratio, and the treatment process mostly adopts A 2 / O process, this process has problems such as complex process flow, high energy consumption and material consumption, poor denitrification effect, inconvenient operation, etc., which may easily cause the effluent to fail to meet the standard, resulting in pollutants such as nitrogen, phosphorus, and organic matter entering the receiving water body and causing water body enrichment Nutritization. Therefore, there is an urgent need for a sewage treatment system and method suitable for low carbon-to-nitrogen ratios to solve the above problems. [0003] Partial short-path nitrification-anammox membrane aerated biofil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
CPCC02F3/307C02F2203/006C02F2203/004C02F2209/06C02F2209/02C02F2209/03C02F2209/22C02F2209/14C02F2209/16
Inventor 李保安李明王国峰田忠艳肖岭
Owner NANKAI UNIV
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