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Zero-energy-consumption enhanced AB (adsorption-biodegradation) treatment method for urban sewage

A technology for urban sewage and treatment methods, which is applied in the field of adsorption-biodegradation treatment, can solve the problems of low removal of refractory organic matter and nitrogen and phosphorus removal, high investment and operating costs, and achieves low sludge yield and stable operation. Effect

Active Publication Date: 2013-05-01
深圳市君脉膜科技有限公司
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Problems solved by technology

In the early sewage treatment process, there were problems such as low removal of refractory organic matter, nitrogen and phosphorus removal, and high investment and operating costs. Based on a large number of studies on the two-stage activated sludge process and the high-load activated sludge process, Bink developed the AB method of sewage treatment process

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  • Zero-energy-consumption enhanced AB (adsorption-biodegradation) treatment method for urban sewage
  • Zero-energy-consumption enhanced AB (adsorption-biodegradation) treatment method for urban sewage

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Embodiment Construction

[0023] The invention provides a zero-energy urban sewage biological treatment method. The following combination figure 1 Examples are given to illustrate the present invention.

[0024] The amount of sewage influent is 100,000 tons / day. The urban sewage is first pretreated by coarse and fine grids to remove suspended solids with a large specific gravity, and then enters the adsorption tank together with the digested sludge returned by the anaerobic sludge digestion unit, and adopts the method of blast aeration and mechanical stirring The sewage and sludge in the adsorption tank are fully stirred and mixed, so that the organic matter in the sewage is adsorbed and removed by the sludge. The mixed liquid a of sludge and sewage flows into the intermediate sedimentation tank, and after gravity sedimentation, the clarified sewage flows into the aeration tank, and 50-100% of the sludge returns to the adsorption tank to provide sufficient biological sludge. The aeration tank is div...

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Abstract

The invention provides a resource treatment method of urban sewage and relates to a sewage treatment technology. The invention discloses a zero-energy-consumption enhanced AB (adsorption-biodegradation) treatment method for urban sewage, which includes the following steps of: simultaneously introducing pretreated urban sewage and digested sludge returned from an anaerobic sludge digestion unit into an adsorption tank for biochemical adsorption reaction; introducing the effluent of the adsorption tank into an intermediate settling tank for sludge-water separation and introducing clarified sewage into an aeration tank; carrying out organic matter biodegradation, nitrification and other biochemical reactions on the sewage and sludge in the aeration tank; introducing the effluent mixed liquidof the aeration tank into a secondary settling tank for sludge-water separation; concentrating the excess sludge discharged from the intermediate settling tank and secondary settling tank sludge and discharging to the anaerobic sludge digestion unit for digestion treatment; and digesting the sludge in the anaerobic sludge digestion unit under an anaerobic condition, returning part of the digestedsludge to the adsorption tank or the aeration tank and dewatering the other part of the digested sludge for sludge treatment.

Description

technical field [0001] The invention belongs to a sewage treatment technology, in particular to a zero-energy adsorption-biodegradation treatment method for urban sewage. Background technique [0002] AB process is the abbreviation of Adsorption-Biodegradation process. This sewage biological treatment technology is a sewage biological treatment process created in the mid-1970s by Professor Botho Bohnke of the School of Sanitation Engineering of a German industrial university on the basis of the traditional secondary biological treatment system. In the early sewage treatment process, there were problems such as low removal of refractory organic matter, nitrogen and phosphorus removal, and high investment and operating costs. Based on a large number of studies on the two-stage activated sludge process and the high-load activated sludge process, Bink developed the AB method of sewage treatment process. The AB process consists of three sections: sewage pretreatment section, A ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F11/04C02F11/12
CPCY02E50/30Y02W10/20
Inventor 余静
Owner 深圳市君脉膜科技有限公司
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