Sewage denitrification dephosphorization system and operation method

Abstract

The invention belongs to the technology field that adopts biotechnology and physical-chemical technology for treating sewage, in particular to a denitrification and dephosphorization system applicable to village wastewater and an operation method thereof. The system comprises a sewage treatment area of an integrative oxidation ditch with vertical circulation, a filter tank and a ground treatment area. The invention takes advantage of the sewage treatment area of the integrative oxidation ditch with vertical circulation to remove organic contamination, total nitrogen, total suspended solid, etc. while the filter tank to further remove total suspended solid and the ground treatment area to further remove phosphorus in the wastewater. Wastewater is treated by the denitrification and dephosphorization system of the invention applicable to village wastewater, the content of nitrogen and phosphorus in the treated wastewater is greatly lowered so as to protect environment effectively. The invention has the advantages of less investment and land occupation, simple operation and maintenance and good quality of the treated wastewater and is especially applicable to village wastewater treatment system in water source protection area and tourism area.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment by using biological technology and physicochemical technology, and particularly relates to a nitrogen and phosphorus removal system suitable for village sewage and an operation method thereof. Background technique [0002] With the acceleration of urbanization in China and the increase in the treatment rate of sewage in large cities, small pollution sources such as small towns and villages have become an important factor in water pollution sources. The treatment of small pollution sources will become a focus of attention in the future. Areas that have special requirements for some water bodies and environments, such as tourist areas and water source protection areas, not only require sewage to be discharged after treatment, but also have higher requirements for the water quality of the treated water (mainly nitrogen, phosphorus, etc. causing eutrophication in the water body). emission re...

AI Technical Summary

Problems solved by technology

Its disadvantages are: the secondary sedimentation tank is built in the circulation channel, which increases the water flow resistance and energy consumption; at the same time, the requirements for aeration equipment are increased; the system operation adjustment performance is poor

[0006] Secondary treatment effluent contains a small amount of suspended solids, directly entering the land treatment system will reduce the service life of the land treatment system

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