Sludge processing method

Abstract

The invention relates to a sludge processing method, the sludge processing method comprises the following steps: A, crushing combustible waste into granular; B, using a mixer to mix sludge having the water content of 70%-80% and the granular combustible waste together to reduce the water content of a mixed mixture to 40%-60%; C, conveying the mixed mixture into an extruder by a conveyor belt, again performing extrusion dehydration treatment of the mixture by the extruder to reduce the water content of the mixed mixture to 10%-15%; and D, performing finished-product shape molding treatment of the mixture in step C by a shaping machine; and the molded mixture is convenient to store and transport. According to the sludge processing method, a combustible matter is prepared by simple mixing, extruding, shaping and drying of the sludge and the combustible waste of wood dust and wood residue or balloonflower root and rice husk, and the like, various harmful substances in the sludge are killed, and secondary pollution of the sludge on the environment and occupation of land can be reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution treatment, in particular to a sludge treatment method. Background technique [0002] Due to the rapid economic development, along with the continuous acceleration of the urbanization process, the urban sewage treatment rate and treatment capacity have been continuously improved, and the construction scale of sewage treatment facilities is rapidly expanding. The large amount of sludge produced in the process of sewage treatment is becoming a new issue. social and environmental issues. [0003] Sludge is in solid and semi-solid state, with high viscosity and high water content, a large amount of organic matter is concentrated in the sludge, and the sludge is often accompanied by heavy metals, inorganic salts, pathogenic bacteria, parasite eggs, etc. Toxic and harmful ingredients. At present, the method of sludge treatment is mainly landfill, and there is no other treatment for slud...

AI Technical Summary

Problems solved by technology

At present, the method of sludge treatment is mainly landfill, and there is no other treatment for sludge, so that there are still hidden dangers of pollution in the sludge. A rain can restore the sludge to its original shape, causing secondary pollution, and directly endangering the ecological environment. and human health; burial requires a large amount of land and does not conform to the direction of national land use development

Although incineration of sludge has the least re-pollution to the environment, it is difficult to solidify, the incineration system is complicated, and the operation is difficult. The combustion requires a large amount of auxiliary fuel and the operating cost is relatively high.