Up-flow solid carbon source biofilm carrier denitrification bioreactor

Abstract

The invention proposes an up-flow solid carbon source biofilm carrier denitrification bioreactor, comprising a partition plate, a fixed frame, a biofilm carrier, a mechanical stirrer, a heating constant temperature device and the like, wherein the biofilm carrier is a biodegradable polyester sheet modified by thermoplastic starch; and the material is high in mechanical strength and good in biodegradability, benefits for adsorption and biofilm formation of microorganisms, and can be used for providing a carbon source for microbial denitrification. The reactor has the advantages of being concise in structure, simple and convenient to operate, easy for biofilm formation, high in treatment efficiency, strong in DO resistance and pH impact load, low in operation cost, and the like; and the carrier is environment-friendly and free of pollution, and has a high project application value.

Description

technical field [0001] The invention belongs to membrane bioreactor wastewater treatment equipment, and is mainly aimed at denitrification treatment of effluent from secondary sedimentation tanks of urban sewage treatment plants with high nitrate nitrogen content. Background technique [0002] At present, about 90% of urban sewage treatment plants in my country are designed to meet the first-class B standard. Urban sewage treatment plants collect and treat most of the urban domestic sewage, so the discharge volume is very large. At the same time, with the acceleration of industrialization and urbanization, the displacement of this part is growing rapidly. This causes a lot of pressure on the environment in a certain area. If the urban sewage treatment plant is still designed and operated according to the old Class B discharge standard, the nitrogen and phosphorus in it will accumulate in the water body over time, resulting in eutrophication of the water body. Especially to ...

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Problems solved by technology

However, adding liquid organic matter such as methanol and ethanol to sewage may easily lead to insufficient or excessive carbon source addition under the condition of influent water quality fluctuations. If the dosage is too large, the effluent will contain excess liquid carbon sources, which will affect the quality of effluent water. At the same time, it will cause high operating costs; less dosage will l

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