Municipal sludge treatment system

Abstract

The invention relates to the field of municipal sewage treatment, particularly to a municipal sludge treatment system, which comprises a heavy metal removal area, a plant cultivation area, a sludge dehydration area and a sludge granulation sterilization area, wherein dewatered sludge is conveyed to the heavy metal removal area from a sewage treatment plant, heavy metals are absorbed through heavymetal enrichment plants, the sludge subjected to heavy metal removal is conveyed to the sludge dehydration area and is dehydrated, the dehydrated sludge is conveyed to the sludge granulation sterilization area, the blocky sludge is granulated and sterilized, and finally the treated sludge particles are bagged to be sold as commercial soil. Compared with an electrokinetic method, a bioleaching method and a chemical method, the BAS technology is low in treatment cost, environmentally friendly, free of secondary pollution, low in disturbance to the environment and popular with the public, and sludge treated by plants can be reused as an organic fertilizer so as to meet the requirement of circular economy; and compared with a traditional plant method, the BAS technology is large in biomass andhigh in enrichment efficiency, and can remove various heavy metals at the same time.

Description

technical field [0001] The invention relates to the field of urban sludge treatment, in particular to an urban sludge treatment system. Background technique [0002] Sludge from urban sewage plants contains organic matter, heavy metals, pathogenic bacteria and other components, and its physical and chemical properties are very unstable. During the process of storage, transportation and treatment, the properties of its components will continue to change. serious harm to the environment. [0003] Sludge has complex components, and if it is not disposed of properly, it may cause great harm to the ecological environment [0004] With the increase of the amount of sewage treatment, the sludge output increased sharply, and the research on the sludge treatment and disposal scheme was carried out in my country immediately. After more than ten years of experiments, there are now traditional treatment and disposal methods such as sludge sanitary landfill, land use and incineration. T...

AI Technical Summary

Problems solved by technology

[0002] Sludge from urban sewage plants contains organic matter, heavy metals, pathogenic bacteria and other components, and its physical and chemical properties are very unstable. During the process of storage, transportation and treatment, the properties of its components will continue to change. serious harm to the environment

[0003] Sludge has complex components, and if it is not disposed of properly, it may cause great harm to the ecological environment

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