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BRGA (Biological Rotating Gradient Aeration) municipal wastewater treatment method

A technology for municipal sewage and treatment methods, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of low compliance rate and achieve the effect of high-efficiency purification function

Inactive Publication Date: 2013-06-26
杭州市城乡建设设计院股份有限公司
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Problems solved by technology

Based on the actual operation data of existing sewage treatment facilities in my country and the overall situation of water bodies in China, the actual compliance rate of existing sewage treatment facilities is low, and the treatment process used must be improved

Method used

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  • BRGA (Biological Rotating Gradient Aeration) municipal wastewater treatment method

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with accompanying drawing.

[0016] BRGA (Biological Rotating Gradient Aerotion) bio-dominant gradient aeration technology is a rapidly developing sewage treatment method.

[0017] Such as figure 1 Shown, BRGA municipal (domestic) sewage treatment method of the present invention comprises the steps:

[0018] Municipal sewage is pre-sedimented in the pre-sedimentation tank;

[0019] Set the selective high-efficiency bioreactor in the front section of the gradient biochemical aeration tank to treat the sewage and add microbial growth promoters at the same time;

[0020] Gradient biochemical aeration treatment is performed on the sewage in the gradient biochemical aeration tank;

[0021] The treated sewage is settled in the sedimentation tank.

[0022] The selective high-efficiency bioreactor is a special equipment improved on the basis of a biological turntable. Please refer to CN201310096696.8 and C...

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Abstract

The invention discloses a BRGA (Biological Rotating Gradient Aeration) municipal wastewater treatment method which comprises the following steps of: pre-precipitating municipal wastewater in a pre-precipitating pool; arranging a selective efficient bioreactor in a front section of a gradient biochemical aeration tank to treat wastewater, and casting a microbial growth accelerant; performing gradient biochemical aeration treatment to wastewater in the gradient biochemical aeration tank; and precipitating treated wastewater in a precipitating pool. The BRGA municipal (domestic) wastewater treatment method provided by the invention is based on an advantaged principle of decomposing effective cultures of pollutants. When water inlet quality and condition of wastewater to be treated are changed, advantaged cultures under low temperature and low carbon nitrogen ratio still maintain efficient purifying function by moderately changing operating parameters of a main facility and casting the microbial growth accelerant in a targeted manner. The problem that TN of treated wastewater is hard to reach the standard by the existing municipal (domestic) wastewater treatment technology in the condition that water temperature is lower than 15 DEG C and carbon nitrogen ratio is lower than 4.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a BRGA municipal sewage treatment method. Background technique [0002] In the past two decades, my country's municipal (domestic) sewage treatment has gone through two important stages. The discharge of (domestic) sewage is carried out in accordance with "GB18918-2002". In addition to the improvement of some discharge indicators, the new standard has increased the total nitrogen assessment indicators of the effluent. The increase of the total nitrogen assessment index has caused great changes in the basic process of sewage treatment. With the development of the economy and the improvement of people's quality of life, some changes have taken place in the quality of sewage. With the rise of industry, some municipal sewage systems inevitably accept part of the treated industrial sewage. At present, newly built municipal sewage treatment facilities, from the perspective of strengtheni...

Claims

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Application Information

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IPC IPC(8): C02F3/34
Inventor 赵宏高重建范霁雯王英达张继民
Owner 杭州市城乡建设设计院股份有限公司
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