Low-temperature treatment method of A/O/MBBR municipal sewage

A technology for urban sewage and low-temperature treatment, applied in water/sludge/sewage treatment, water/sewage multi-stage treatment, chemical instruments and methods, etc., can solve problems such as low nitrification efficiency and slow proliferation rate of autotrophic nitrifying bacteria , to achieve good effect, improve low-temperature denitrification efficiency, and improve the ability to remove organic matter

Inactive Publication Date: 2013-09-11
HARBIN INST OF TECH
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  • Description
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Problems solved by technology

[0004] The present invention aims to solve the problem of low nitrification efficiency due to the slow proliferation rate of autotrophic nitrifying bacteria in the existin

Method used

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  • Low-temperature treatment method of A/O/MBBR municipal sewage

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specific Embodiment approach 1

[0029] Embodiment one: the method for the low-temperature treatment of A / O / MBBR urban sewage among the present invention is carried out according to the following steps:

[0030] 1. After the urban sewage is lifted, the suspended matter and some organic matter in the sewage are removed through the primary treatment system, and then enters the water inlet pool, and then enters the biochemical system through the water inlet pool;

[0031] 2. First enter the anoxic tank, mix with the returning nitrifying liquid, the return sludge of the secondary settling tank and the supernatant of the sludge hydrolyzate, and achieve a complete mixing state under the action of stirring, in which the HRT of the anoxic tank is 1.5 h~2.5h, DO is 0mg / L~0.5mg / L;

[0032] The anoxic tank mainly carries out denitrification and denitrification, and the carbon source is provided by the organic matter in the influent water and the sludge supernatant returned;

[0033] 3. The sewage treated in step 2 ente...

specific Embodiment approach 2

[0051] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 2, the HRT of the anoxic pool is 1.8h-2.2h, and the DO is 0.1mg / L-0.4mg / L. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0052] Embodiment 3: This embodiment differs from Embodiment 1 in that: in step 2, the HRT of the anoxic pool is 2 hours, and the DO is 0.25 mg / L. Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention relates to a low-temperature treatment method of A/O/MBBR (Anaerobic/Oxic/Moving Bed Biofilm Reactor) municipal sewage. The low-temperature treatment method of A/O/MBBR municipal sewage is used for solving the problem of low nitrification efficiency of the existing sewage treatment method in north because autotrophic nitrifying bacteria are difficult to accumulate in a low-temperature system due to low multiplication rate. The low-temperature treatment method of A/O/MBBR municipal sewage is realized through the following steps of: 1, guiding the municipal sewage to a water inlet pool through primary treatment; 2, guiding the municipal sewage to an anaerobic pool; 3, guiding the municipal sewage to an aerobic I section; 4, guiding the municipal sewage to an MBBR system from the aerobic I section; 5, guiding the municipal sewage to a secondary sedimentation tank from the MBBR system; and 6, guiding the municipal sewage to a sludge hydrolyzing pool from the secondary sedimentation tank. The low-temperature treatment method of A/O/MBBR municipal sewage can be used for the field of winter sewage treatment engineering in northern cities.

Description

technical field [0001] The invention relates to a method for urban sewage treatment, in particular to an A / O / MBBR low-temperature treatment method for urban sewage. Background technique [0002] Under the new situation where the pressure on the water environment is increasingly prominent, the efficient and stable operation of sewage biological treatment technology can enable the reuse of sewage resources, effectively solve the shortage of water resources, water environment pollution, and water ecological destruction that my country is currently facing, and achieve water health. sustainable cycle. With the implementation of the National Twelfth Five-Year Plan, the concept of water resources has been continuously strengthened, and the discharge standards of sewage treatment plants have become more stringent, which requires a new round of upgrading and transformation of sewage treatment plants under the new situation. However, in most parts of northern my country, especially in...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 李相昆周合喜任玉辉史冬峰
Owner HARBIN INST OF TECH
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