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A method for denitrification and dephosphorization of urban sewage

A technology for nitrogen and phosphorus removal and sewage, which is applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of high energy consumption and material consumption, and reduce operating costs, energy The effect of reduced consumption and high denitrification rate

Active Publication Date: 2016-01-13
RENMIN UNIVERSITY OF CHINA
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Problems solved by technology

[0002] A 2 The / O process has been widely used in urban sewage treatment plants, but in the process of operation, energy consumption and material consumption are relatively high, which is a common problem faced by urban sewage treatment plants

Method used

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  • A method for denitrification and dephosphorization of urban sewage

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Embodiment 1

[0032] The technological process of this denitrification and phosphorus removal A-MA-A method is as follows: figure 1 shown.

[0033] The process is mainly composed of anaerobic tank 1, rapid sedimentation tank 2, micro-aerobic tank 3, anoxic tank 4, and secondary sedimentation tank 5. In the anaerobic tank, anaerobic ammonia oxidation nitrogen removal and short-range denitrification phosphorus accumulation bacteria release are carried out. Phosphorus and COD are also degraded, the anaerobic ammonia oxidation dominant bacteria are cultivated in the pool, the ammonia nitrogen oxidation is carried out in the microaerobic pool, the environmental conditions are controlled to enrich the nitrite, and the ammonia oxidizing bacteria (AOB) are cultivated in the pool as the dominant flora .

[0034] The pH meter, DO meter and ORP meter in the main biological reaction tank are automatically controlled by computer to monitor the pH value, DO value and anaerobic, micro-atrophic and anoxic...

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Abstract

The invention provides a method for carrying out nitrogen and phosphorus removal on municipal sewage municipal sewage. The method comprises the following steps: (1), carrying out anaerobic ammonia oxidation and phosphorus release treatment of short-cut denitrification phosphorus-accumulating bacteria on sewage in an anaerobic tank to obtain muddy water mixed liquor; (2), settling the obtained muddy water mixed liquor in a quick settling tank, firstly carrying out short-cut denitrification phosphorus-absorbing treatment on the obtained sludge, and then carrying out secondary settling in a secondary settling tank; firstly transferring the obtained liquid supernatant to a micro aerobic tank, carrying out oxidization treatment of ammonia nitrogen, then transferring to an anoxic tank, carrying out short-cut denitrification phosphorus-absorbing treatment, and finally carrying out secondary settling in the secondary settling tank; (3), refluxing nitrite mixed liquor produced by the micro aerobic tank to the anaerobic tank; (4), refluxing the sludge obtained by secondary settling to the anaerobic tank, wherein a liquid supernatant is the sludge obtained after nitrogen and phosphorus removal. The method disclosed by the invention can be used for not only realizing efficient nitrogen and phosphorus removal, but also greatly lowering energy consumption and material consumption in a sewage treatment process, and is especially suitable for treating low C / N (carbon / nitrogen) municipal sewage.

Description

technical field [0001] The invention relates to a method for denitrifying and dephosphorizing urban sewage. Background technique [0002] A 2 The / O process has been widely used in urban sewage treatment plants, but in the process of operation, energy consumption and material consumption are relatively high, which is a common problem faced by urban sewage treatment plants. Therefore, it is necessary to study new energy-saving and consumption-reducing processes. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a method for denitrifying and dephosphorizing urban sewage. [0004] The invention provides a method for denitrifying and dephosphorizing sewage, comprising the following steps: [0005] 1) After the sewage is subjected to anaerobic ammonia oxidation and short-range denitrifying phosphorus-accumulating bacteria in an anaerobic tank for phosphorus release treatment, a mud-water mixture is obtained; [0006] 2) by step 1) gained m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F11/04
Inventor 王洪臣张源凯齐鲁刘国华范海涛
Owner RENMIN UNIVERSITY OF CHINA
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