Jet-flow aeration biological filtering tank

A technology of jet aeration and biological filter, which is applied in the field of jet aeration biological filter and sewage treatment device, can solve the problems of small sewage treatment plants with many structures and complicated maintenance and management, and achieves a wide range of water quality adaptation and suspended solids concentration. The effect of low and saving operating costs

Inactive Publication Date: 2005-11-09
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0004] The object of the present invention is to address the deficiencies in the prior art, to provide a jet biological aerated filter, to solve the oxygen supply problem of the biological aerated filter through an integrated solution, and to control the clogging of the filter material through hydraul

Method used

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  • Jet-flow aeration biological filtering tank

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[0022] Example:

[0023]To treat domestic sewage in Minhang District, Shanghai, the biological oxidation filter tank 2 has an effective volume of 40L, a hydraulic retention time of 4 hours, a sewage treatment capacity of 10L / hr, a flow rate of the circulating water pump 14 of 45L / h, and a jet aerator 12 A small experimental device is used, the aperture ratio is 1:5, and the raw water quality is as follows: COD (chemical oxygen demand) 350mg / L, BOD 5 It is 159mg / L, ammonia nitrogen is 10mg / L, total nitrogen is 30mg / L, total phosphorus is 3mg / L, and suspended matter is 25mg / L. After being treated by jet aerated biological filter, the effluent COD30mg / L, BOD 5 The ammonia nitrogen is 5mg / L, the ammonia nitrogen is 3.5mg / L, the total phosphorus is 1mg / L, and the total nitrogen is 10mg / L. The effluent meets the first-class A standard of "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002), and has been disinfected Afterwards, it can be used as municipa...

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Abstract

A jet-aerating biologic filter pool is composed of biologic oxidizing filter pool with bearing plate, bearing layer and filter layer, reverse-flushing water pump, jet aerator, circulating water pump and connecting pipeline. The oxygen aeration of jet aerator and the water circulation can create a better growth environment for microbes to decompose the organic substances in sewage.

Description

technical field [0001] The invention relates to a jet aeration biological filter, which is a sewage treatment device which can be used for domestic sewage and organic industrial wastewater treatment, and belongs to the field of environmental protection water treatment. Background technique [0002] The traditional biological aerated filter (BAF) is a sewage treatment process that emerged in the late 1980s and early 1990s. It was originally used for advanced sewage treatment, and later developed into direct secondary treatment. It uses rough and porous granular filters. Biofilm grows on the surface of the filter material, aeration is provided at the bottom of the pool, and when the sewage flows through the filter bed, the pollutants are first filtered and adsorbed, and then oxidized and decomposed by the microorganisms on the surface of the filter material. Its biggest feature is that it integrates biological oxidation and interception of suspended solids, saves subsequent se...

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Application Information

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IPC IPC(8): C02F3/02
CPCY02W10/10
Inventor 王欣泽何圣兵
Owner SHANGHAI JIAO TONG UNIV
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