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Disposal method for removing nitrogen and phosphorus compounds and sewage condensate in domestic sewage

A domestic sewage and compound technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as destroying the ecological environment, avoid ecological hazards, and realize resource utilization , cost-saving effect

Pending Publication Date: 2021-05-28
BEIJING SHENGTANG TECH CO LTD
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Problems solved by technology

[0003] The traditional activated sludge treatment process produces a large amount of excess sludge, and the drying of excess sludge, incineration, landfill, dumping and other treatment or disposal processes of dry sludge account for 30-50% of the total cost of the treatment facility, and will destroy the surrounding ecological environment

Method used

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Embodiment Construction

[0013] The present invention will be described in further detail below.

[0014] Specifically include the following steps:

[0015] The method of adding flocculant to domestic sewage removes carbon and phosphorus organic matter in sewage, and the nitrogen present in sewage in the form of ammonia remains in sewage, wherein the flocculant is a mixture of ferric chloride and biological flocculant , the mass ratio of the mixture is ferric chloride: biological flocculant is 3:1;

[0016] Through the biofilm with sponge as the material carrier, the ammonia oxidizing bacteria attach to the outside of the biofilm, use the dissolved oxygen in the water to proliferate, and oxidize the ammonia nitrogen in the water to nitrite nitrogen; the anammox bacteria attach to the inside of the biofilm, Under anaerobic conditions, the nitrite nitrogen produced and the ammonia nitrogen in the water are used to form nitrogen gas. The volume filling rate of the sponge biofilm is 16%. The sponge fille...

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Abstract

A large amount of excess sludge is generated in a traditional activated sludge treatment process, the treatment or disposal process of drying of the excess sludge and incineration, landfill, stacking and the like of dry sludge accounts for 30-50% of the total cost of treatment facilities, and meanwhile the surrounding ecological environment can be damaged. The removal technology of nitrogen and phosphorus compounds can fully recycle resources in domestic sewage, reduce energy consumption, save cost and generate less residual sludge, and can avoid the harm of residual sludge to surrounding ecology in the treatment and disposal process while saving the treatment and disposal cost of the residual sludge.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a treatment method for removing nitrogen and phosphorus compounds and sewage solidified matter in domestic sewage. Background technique [0002] With the advancement of urban transformation and expansion, often due to the lagging of the construction of supporting municipal pipe networks and the confluence of rain and sewage in old urban areas, the amount or quality of sewage entering urban sewage treatment plants is far lower than the design volume, resulting in the operation of sewage treatment plants. The influent water content in the process is low, and the biological treatment system is mostly in a low-load operation state. Therefore, research on the suitable operating conditions of the process under low load conditions has gradually become an important issue of concern for urban sewage treatment. [0003] The traditional activated sludge treatment process produces ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F11/14C02F101/16C02F101/30
CPCC02F1/52C02F3/30C02F9/00C02F11/14C02F2101/16C02F2101/30
Inventor 王士恒
Owner BEIJING SHENGTANG TECH CO LTD
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