Hospital linen wastewater treatment system and method

Abstract

The invention relates to a hospital linen wastewater treatment system and method. The system comprises a pH regulating tank, a flocculation tank, a buffer tank, a pretreatment tank, a high-temperaturetreatment device, a cooling device, a hydrolysis acidification tank, a primary biological contact oxidation tank, a primary inclined tube sedimentation tank, a secondary biological contact oxidationtank, a secondary inclined tube sedimentation tank and a filter tank (12) which are sequentially communicated according to the flow direction of sewage. By using the sewage treatment system, the pH ofthe sewage collected by hospitals is adjusted to be neutral, the stability of colloidal particles in the sewage is destroyed under the action of flocculating agents, then large-particle sediments andmost impurities such as thread ends, short fibers and the like in the sewage are intercepted by a filter grid in a pretreatment tank, suspended substances are removed and then enter a hydrolytic acidification tank, macromolecular substances are decomposed into small molecular substances in the hydrolytic acidification tank, organic matters, suspended substances, ammonia nitrogen and the like in the sewage are removed and enter the filter tank (12) through the second biological contact oxidation tank, and then are discharged after being filtered by the filter tank (12).

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a hospital linen wastewater treatment system and method. Background technique [0002] Hospital linen washing enterprises are responsible for the cleaning of hospital work clothes, patient clothes, surgical gowns, bed sheets, bedding, etc. The dirt to be cleaned includes various stains such as human body stains, blood stains, food oil stains, and medicine stains. Pollutants are mainly composed of soap, grease, synthetic detergents, cleaning agents, and a small amount of blood stains, coliform bacteria, viruses and other harmful substances, which are important sources of water pollution. A large amount of waste water produced will cause great pollution if it is discharged directly to the nearby environmental water body without treatment. The pathogenic bacteria, viruses and even drug-resistant bacteria in the washing sewage will pollute the nearby water body and soil, ...

AI Technical Summary

Problems solved by technology

A large amount of waste water produced will cause great pollution if it is discharged directly to the nearby environmental water body without treatment. The pathogenic bacteria, viruses and even drug-resistant bacteria in the washing sewage will pollute the nearby water body and soil, and in severe cases will cause the spread of diseases; Phosphorus in washing sewage will lead to eutrophication of water body, and LAS surfactant will lead to the death of aquatic animals and plants, which will cause great pollution to the ecological environment. The detergent used in washing is extremely difficult to degrade in the natural environment Accumulation in nature will cause adverse effects on human health

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