Medical waste water purification and recovery treatment system mainly based on flocculation and activated sludge biochemical process

Abstract

The invention relates to a medical waste water purification and recovery treatment system mainly based on flocculation and activated sludge biochemical process, comprising a closed type collecting tank, a closed type primary sedimentation tank, a closed type sludge holding tank, a closed type sludge disinfection tank, a closed type sewage sterilization tank, a coagulation tank, a coagulation sedimentation tank, an activated sludge holding tank, a secondary sedimentation tank, a secondary disinfection tank, a rough filtering tank and a refined filtering tank; wherein the intake pipe of the closed type collecting tank is provided with a mechanical grille and a grid residue grinder; the sludge outlet of the closed type primary sedimentation tank is connected with the inlet of the sludge holding tank; the sludge outlet of the sludge holding tank is connected with the sludge disinfection tank; the coagulation tank is provided with a stirring mechanism and is provided with a coagulant quantitative feeding device at the top part; the sludge outlets of the coagulation sedimentation tank and the secondary sedimentation tank are both connected with the secondary sludge holding tank; and the activated sludge holding tank is provided with an aerator at the bottom and a plurality of baffle plates are arranged in the activated sludge holding tank. The invention has good biological safety and convenient operation and maintenance and is applicable to medical waste water with higher concentration of pollutant.

Description

technical field [0001] The invention relates to a medical wastewater purification and recovery treatment system mainly based on flocculation and activated sludge biochemistry, and belongs to the technical field of environmental protection. Background technique [0002] Medical wastewater comes from hospitals and other medical institutions, which may contain a large number of pathogenic microorganisms, and contain various drugs, washing powder, soda ash, radioisotopes, cotton swabs, gauze, etc., and its COD is close to the numerical range of domestic sewage, but the fluctuation is relatively large. Large. The BOD / COD of sewage is generally around 0.5, and the biodegradability is good, but biological safety is an important issue, and it cannot be treated like ordinary sewage. [0003] According to the water quality characteristics of medical wastewater and the adopted discharge standards, the current commonly used treatment technology is to pass the sewage through the grid and...

AI Technical Summary

Problems solved by technology

The current ubiquitous defects are mainly manifested in several aspects: (1) Open tanks are mostly used, especially for aerobic biochemical treatment, because aeration is required in it, there will be a large amount of other discharges, and the gas in these gases The sol will carry microorganisms and diffuse into the atmosphere, and the sewage treatment plant itself is a source of pollution

(2) The operation is not standardized, and the degree of automatic detection and control is low. (3) Some processing sites occupy a large area and high operating costs

[0004] In view of this, people began to develop a fully enclosed treatment system, which closed all treatment equipment, and sterilized the purified water discharged from it and the collected air to achieve the purpose of eliminating biological harmlessness. Closed equipment requires relatively high investment and is difficult to operate and maintain

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