A high-standard nitrogen and phosphorus removal system for urban sewage without additional carbon sources

A technology for urban sewage, nitrogen and phosphorus removal, applied in biological water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as unreasonable resource recovery and reduce aeration The effect of high volume demand, simple process flow and low energy consumption
CN105366889BActive Publication Date: 2018-02-06NORTH CHINA MUNICIPAL ENG DESIGN & RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTH CHINA MUNICIPAL ENG DESIGN & RES INST
Publication Date
2018-02-06

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Abstract

The present invention relates to a high-standard urban sewage nitrogen and phosphorus removal system without external carbon sources. Urban sewage is fed into an urban sewage water inlet of a chemical-biological flocculation reaction tank; flocculant is fed into a flocculant adding port of the chemical-biological flocculation reaction tank; a drainage port of the chemical-biological flocculation reaction tank is connected with a water inlet of a sedimentation tank by a pipe; a drainage port of the sedimentation tank is connected with a water inlet of a mainstream anammox reaction tank by a pipe; a drainage port of the mainstream anammox reaction tank is connected to a drainage pipeline; and a sludge discharge port of the sedimentation tank is connected into the urban sewage water inlet of the chemical-biological flocculation reaction tank by a pipe. According to the system provided by the present invention, an anammox process and a traditional process are integrated organically, the drawback that in the case of a large amount of water flow and significant fluctuations of water quality, quantity and environmental conditions, the anammox process runs unstably is avoided; nitrogen removal efficiency is high; and the external carbon sources are not required even if the carbon nitrogen ratio is low.
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Description

technical field

[0001] The invention relates to a sewage treatment system, which is a high-standard denitrification and phosphorus removal system for urban sewage without external carbon sources. Background technique

[0002] With the continuous intensification of eutrophication of water bodies, the denitrification and phosphorus removal of urban sewage has always attracted much attention. The traditional biological nitrogen and phosphorus removal process has been widely used in urban sewage treatment, but there are disadvantages such as high energy consumption and material consumption, long process flow, and large area. However, it is also necessary to add a large amount of external carbon sources. Therefore, the development and application of new efficient, green and low-carbon wastewater treatment process systems has become an important trend in current and future wastewater treatment.

[0003] As a new biological denitrification technology, compared with the traditiona...

Claims

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