Efficient nitrogen and phosphorus removal township sewage treatment method and device

A sewage treatment method and sewage treatment device technology, applied in the directions of water/sewage multi-stage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of poor nitrogen and phosphorus removal and unstable operation , strict nitrogen and phosphorus emission standards, etc., to achieve the effect of improving oxygen transfer efficiency, good removal effect, and reducing load

Pending Publication Date: 2016-11-16
方佩珍
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Problems solved by technology

[0003] In view of the problems of poor nitrogen and phosphorus removal effect, unstable operation and more stringent nitrogen and phosphorus discharge standards in the existing integrated sewage treatment of village and town sewage, the purpose of this invention is to construct a new type of efficient nitrogen and phosphorus re

Method used

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  • Efficient nitrogen and phosphorus removal township sewage treatment method and device

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[0031] Example 1

[0032] A method and device for high-efficiency denitrification and dephosphorization of village and town sewage treatment, including a sludge tank (8) and a pre-denitrification tank (1), anaerobic tank (2), and aerobic tank (3) connected in sequence , Anoxic tank (4), aerobic tank 2 (5), MBR tank (6) and disinfection and clean tank (7), which include the following steps:

[0033] 1) Village and town sewage influent is divided into two parts, 70% enters the pre-denitrification tank (1), mixed with the sludge returned from the MBR tank (6), and the reaction time is 1 hour; 30% of the influent enters the anoxic tank ( 4).

[0034] 2) After the pre-denitrification treatment, the sewage enters the anaerobic tank (2) for anaerobic phosphorus release reaction, creating favorable conditions for the removal of total phosphorus in the aerobic stage, the residence time is 1 hour, and the subsequent aerobic tank 1 The pond (3) forms an A / O treatment process, so as to achieve...

Example Embodiment

[0040] Example 2

[0041] 1) Village and town sewage influent is divided into two parts, 70% enters the pre-denitrification tank (1), mixed with the sludge returned from the MBR tank (6), and the reaction time is 1 hour; 30% of the influent enters the anoxic tank ( 4).

[0042] 2) After the pre-denitrification treatment, the sewage enters the anaerobic tank (2) for anaerobic phosphorus release reaction, creating favorable conditions for the removal of total phosphorus in the aerobic stage, and the residence time is 1 hour.

[0043] 3) After the sewage passes through the anaerobic tank (2), it enters the aerobic tank 1 (3). When the aerobic tank 1 (3) is not aerated, it becomes an anoxic tank. The reaction time is 2-3 hours. The subsequent anoxic pools (4) constitute the operation mode of the anoxic pools at both ends to strengthen the removal of nitrogen.

[0044] 4) After the sewage passes through the aerobic tank 1 (3), it enters the anoxic tank (4), and mixes with the 30% influent...

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Abstract

The invention relates to an efficient nitrogen and phosphorus removal township sewage treatment method and device, and belongs to the technical field of sewage treatment. The device comprises a pre-denitrification area, an anaerobic area, an aerobic tank 1, an anoxic area, an aerobic tank 2, an MBR (membrane biological reactor) tank and a disinfection and clean water tank. After entering the device, sewage is sequentially subjected to anoxic denitrification, anaerobic phosphorus release, aerobic phosphorus uptake, anoxic denitrification and aerobic phosphorus uptake under the action of different types of microorganisms. Endogenous denitrification is enhanced by biological stuffing, sectioned phosphorus removal and denitrification are performed, the contradiction of carbon source demands of nitrogen and phosphorus removal is solved, township domestic sewage can be subjected to deep nitrogen and phosphorus removal treatment without adding carbon sources, and nitrogen and phosphorus are efficiently removed by efficient interception separation characteristics. The device is stable in effluent quality and particularly suitable for treating township sewage in sensitive water body areas such as a water source area and a scenic area or needing recovery, the effluent quality can stably reach a first-class A standard and a surface water quasi four-class water standard which is the highest standard for domestic municipal sewage treatment.

Description

technical field [0001] The invention relates to a sewage treatment method and device, in particular to a village and town sewage treatment method and device for efficient denitrification and phosphorus removal. Background technique [0002] During the "Twelfth Five-Year Plan" period, the sewage treatment in cities is becoming more and more perfect, while the sewage treatment in villages and towns has just started. After entering the "Twelfth Five-Year Plan", the country's policy guidance and strategic investment in the field of environmental protection have further increased, and village and town sewage treatment has become one of the key points of water environment treatment. Due to differences in lifestyle and regions, compared with urban sewage, the nitrogen and phosphorus content of rural sewage fluctuates greatly. If it is not treated effectively, it will easily cause eutrophication of the water body, especially when the effluent is discharged into sensitive water bodie...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F9/00C02F2303/04C02F1/50C02F3/301C02F3/28C02F3/1268C02F3/308
Inventor 陈振国
Owner 方佩珍
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