Denitrification reactor and sewage treatment system

Abstract

The invention provides a denitrification reactor and a sewage treatment system, relates to the technical field of sewage treatment equipment, and solves the technical problem of high energy consumption caused by the fact that a carbon source needs to be added when the carbon-nitrogen ratio of inlet water is small in an existing denitrification process. The device comprises a reactor body, an anoxic section and an aerobic section are sequentially arranged in the reactor body from bottom to top, the anoxic section is filled with an autotrophic denitrification filter material, and the aerobic section is arranged above the anoxic section and used for enabling sewage reacted with the autotrophic denitrification filter material in the anoxic section to rise to the aerobic section for biological contact oxidation reaction. According to the invention, the sewage and the autotrophic denitrification filter material are subjected to an autotrophic denitrification nitrogen removal reaction in the anoxic section, no additional carbon source needs to be added, the sludge generation amount is small, and the system is especially suitable for nitrogen removal of wastewater with a low carbon-nitrogen ratio. And then the sewage rises to the aerobic section for biological contact oxidation reaction, head loss is avoided, and the aerobic section does not need backwashing, so that the power loss is low, the sludge generation amount is small, and the system is suitable for low-carbon sewage treatment.

Description

technical field [0001] The invention relates to the technical field of sewage treatment equipment, in particular to a denitrification reactor and a sewage treatment system. Background technique [0002] The commonly used denitrification process in the field of water treatment is biological denitrification. Biological denitrification can be divided into heterotrophic denitrification and autotrophic denitrification. , reducing nitrate nitrogen to nitrogen gas. The traditional three-stage, two-stage and single-stage heterotrophic biological denitrification systems all need to add carbon sources to ensure the denitrification effect. For this reason, the pre-denitrification A / O process came into being, which can use the organic matter in the sewage itself to denitrify nitrification. At present, the common denitrification process includes denitrification process in the form of activated sludge method (A / O), denitrification aerated biological filter in the form of biofilm method ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a denitrification reactor and a sewage treatment system to solve the technical problems of the denitrification process existing in the prior art that need to add a carbon source when the carbon-nitrogen ratio of the influent is low and the energy consumption is high

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