Catalytic electrolysis municipal sewage purification system and purification method

Abstract

The invention discloses a catalytic electrolysis municipal sewage purification system and a purification method.The catalytic electrolysis municipal sewage purification system comprises a primary treatment device, a physical and chemical purification device, a catalytic electrolysis deep purification device, a reduction device and a sludge treatment device, and the primary treatment device comprises a coarse screen, a fine screen and a grit chamber; the physicochemical purification device is one of air floatation or coagulating sedimentation decontamination devices and comprises a pH regulating tank, a coagulating tank, a coagulation aid tank, an air floatation tank or a sedimentation tank; the catalytic electrolysis deep purification device comprises an electrolysis machine and a degassing tank; a sewage inlet and a water outlet of the electrolysis machine are respectively connected with the middle water tank and the degassing tank; a pipeline mixer of the reduction device is connected with a water outlet pipe of the degassing tank; and a water outlet of the pipeline mixer is connected with a water distributor at the bottom of the reduction tank. The municipal sewage treatment device can efficiently remove SS, chromaticity, COD, BOD, ammonia nitrogen, total nitrogen, animal and vegetable oil, petroleum and total phosphorus in municipal sewage, kill fecal coliform and improve the concentration of dissolved oxygen, so that the sewage is converted into recyclable water resources.

Description

technical field [0001] The invention relates to a catalytic electrolysis municipal sewage purification system and a purification method, in particular to a catalytic electrolysis municipal sewage purification system and purification method which integrates devices such as physical purification, catalytic electrolysis denitrification and deep purification, and belongs to the field of environmental protection. Background technique [0002] Municipal sewage, also known as urban sewage, is the polluted water body produced in the process of people's living and production. The concentration of main pollutants in municipal sewage in my country is low in the south and high in the north. Generally, the physical and chemical indicators are COD≤700mg / L (mostly in the range of 200-500mg / L, of which, COD≤500mg / L in the southern region), BOD≤350mg / L (mostly in 100~300mg / L, BOD≤300mg / L in southern region), SS≤400mg / L, ammonia nitrogen≤50mg / L, total nitrogen≤70mg / L, total phosphorus≤10mg / L, ...

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Problems solved by technology

[0012] In order to solve the above-mentioned technical problems, the purpose of the present invention is to solve the existing problems of large land occupation, poor effluent quality, large investment, long purification time, unstable operation of the northern sewage treatment plant in winter, and nitrogen and phosphorus content in the effluent of the existing sewage treatment plant treatment process. High, resulting in water eutrophication defects, to provide a municipal sewage catalytic electrolysis deep purification system and its method

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