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Integrated technology for high efficiency nitrogen and phosphorus removal based on sludge emission reduction and device thereof

A technology for nitrogen and phosphorus removal and sludge removal, which is applied in the field of environment and municipal engineering to achieve the effect of enhancing phosphorus removal effect, reducing suspended solid concentration, and enhancing the effect of nitrogen removal

Inactive Publication Date: 2012-06-27
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003]The traditional activated sludge method is still the mainstream sewage biological treatment technology at home and abroad. The cost can account for about 50-60% of the total cost of sewage treatment plant construction and operation, and the huge investment required to dispose of excess sludge is also a major problem in sewage biological treatment

Method used

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  • Integrated technology for high efficiency nitrogen and phosphorus removal based on sludge emission reduction and device thereof
  • Integrated technology for high efficiency nitrogen and phosphorus removal based on sludge emission reduction and device thereof
  • Integrated technology for high efficiency nitrogen and phosphorus removal based on sludge emission reduction and device thereof

Examples

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Embodiment 1

[0023] A high-efficiency denitrification and phosphorus removal integrated process based on sludge emission reduction. The process is as follows: sewage filtered by a grid enters an anaerobic tank from the bottom, and is fully mixed with the sludge in the anaerobic tank under stirring conditions; anaerobic effluent After flowing out from the upper part of the anaerobic tank, it enters the anoxic tank from the bottom and mixes with the sludge in the anoxic tank; the anoxic effluent flows out from the upper part of the anoxic tank and enters the aerobic tank from the middle, where it mixes with the sludge in the aerobic tank. Fully mixed, the mixed liquid circulates in the aerobic tank; a part of the mixed liquid flows out from the lower end of the aerobic tank and returns to the anoxic tank; the other part of the mixed liquid is discharged through the solid-liquid separation of the membrane module. The stirring speed in the anaerobic tank is 50 r / min; the liquid part in the anox...

Embodiment 2

[0026] A high-efficiency denitrification and phosphorus removal integrated process based on sludge emission reduction. The process is as follows: sewage filtered by a grid enters an anaerobic tank from the bottom, and is fully mixed with the sludge in the anaerobic tank under stirring conditions; anaerobic effluent After flowing out from the upper part of the anaerobic tank, it enters the anoxic tank from the bottom and mixes with the sludge in the anoxic tank; the anoxic effluent flows out from the upper part of the anoxic tank and enters the aerobic tank from the middle, where it mixes with the sludge in the aerobic tank. Fully mixed, the mixed liquid circulates in the aerobic tank; a part of the mixed liquid flows out from the lower end of the aerobic tank and returns to the anoxic tank; the other part of the mixed liquid is discharged through the solid-liquid separation of the membrane module. The stirring speed in the anaerobic tank is 40 r / min; the liquid part in the anox...

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Abstract

The invention relates to an integrated technology for the high efficiency nitrogen and phosphorus removal based on sludge emission reduction. The technology comprises the following steps: 1, sewage filtered by a grating enters an anaerobic pool and is fully mixed with sludge in the anaerobic pool under stirring, the obtained anaerobic outlet water enters an anoxic pool and fully contacts with sludge in the anoxic pool, the obtained anoxic outlet water enters an aerobic pool and is fully mixed with sludge in the aerobic pool, and the obtained mixed liquor circulatingly flows in the aerobic pool; 2, a moiety of the mixed liquor backflows to the anoxic pool; and 3, the other moiety of the mixed liquor is discharged after solid-liquid separation carried out by a membrane assembly. According to the technology of the invention, A2 / O is combined with a membrane biological reactor (MBR), so the concentration of the sludge in the aerobic pool is higher than sludge concentrations through routine active sludge methods, and the sludge age is prolonged; and additionally, the sludge concentrations of above three pools are adjusted through stirring and backflow processing, so nitrogen and phosphorus removal effects are enhanced, and processed outlet water indexes can reach a first order standard A in GB18918-2002.

Description

technical field [0001] The invention belongs to the technical field of environment and municipal engineering, and in particular relates to an A 2 / O-MBR high-efficiency nitrogen and phosphorus removal integrated process is suitable for advanced treatment and reclaimed water reuse in urban sewage and industrial wastewater treatment. Background technique [0002] Due to the growth of world population and the development of social economy, the eutrophication of water quality is becoming more and more serious. Therefore, countries have also formulated strict nitrogen and phosphorus discharge standards, and the process of nitrogen and phosphorus removal has also attracted much attention. The "Pollutant Discharge Standards for Urban Wastewater Treatment Plants" (GB18918-2002), implemented since July 1, 2003, puts forward stricter requirements on TN (total nitrogen) and TP (total phosphorus) of the effluent from urban sewage treatment plants. In the conventional nitrogen and phos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 邢传宏王素兰马晓力史思于洁胡广杰魏锐
Owner ZHENGZHOU UNIV
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