Catalytic oxidation slow percolation nitrogen and phosphorus removal device and method

Abstract

The invention discloses a catalytic oxidation slow percolation nitrogen and phosphorus removal device. According to the catalytic oxidation slow percolation nitrogen and phosphorus removal device, two stages of grillage machines are arranged above an unpowered biological rotating disc and biological filter integrated device, so as to form a high-level water inlet tube; flowing type molecular sieve packing is paved on the bottom of the high-level water inlet tube; a plurality of biological rotating discs are arranged above the flowing type molecular sieve packing; the biological rotating discs are divided into two zones A and B by a wall body; effluent of the zone B is introduced into an M-type constructed wetland; the M-type constructed wetland is internally divided into two zones by another wall body and is filled with a mixture of gravel and florida diatomite; the effluent of the M-type constructed wetland enters a surface turbulent flow screening device; a sludge discharge hole is formed in the bottom of a turbulent flow sand removal device; a stirring machine which is driven by a motor is arranged on the top of the turbulent flow sand removal device; and impellers of the stirring machine tilt upwards; sewage in a pond makes spiral movement when the impellers rotate. The invention further discloses a method for catalytic oxidation slow percolation nitrogen and phosphorus removal by using the catalytic oxidation slow percolation nitrogen and phosphorus removal device.

Description

technical field [0001] The invention relates to a device for denitrification and dephosphorization by contact oxidation and slow percolation, in particular to a device for reducing biological toxicity of sewage by ecological method and degrading pollutants in sewage. [0002] The invention also relates to a method for reducing biological toxicity of sewage and degrading pollutants in sewage by using the device. Background technique [0003] Nitrogen and phosphorus are important nutrient sources for organisms. With the widespread use of chemical fertilizers, detergents and pesticides, the content of nitrogen and phosphorus in natural water bodies has increased sharply. Urban sewage is one of the main sources of nitrogen and phosphorus pollutants. When these biological nutrients are directly discharged into the receiving water body without removal, it will cause abnormal growth of algae and other aquatic plants in the receiving water body and consume oxygen in the water. Make...

AI Technical Summary

Problems solved by technology

Urban sewage is one of the main sources of nitrogen and phosphorus pollutants. When these biological nutrients are directly discharged into the receiving water body without removal, it will cause abnormal growth of algae and other aquatic plants in the receiving water body and consume oxygen in the water. Make water black and smelly, cause eutrophication of water body, seriously affect the economic value and social value of water body

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