Method used for preparing environmental protection material through sludge low temperature charing

Abstract

The invention discloses a method used for preparing an environmental protection material through sludge low temperature charing, and is capable of solving a finial processing problem of municipal sewage treatment plant sludge. According to the method, ramie sticks are added, integrated sludge crushing, drying, mixing stirring, and charing are adopted, so that the environment-protection material isprepared. The environment-protection material can be applied in filtering and adsorbing directly; the technology is simple; investment cost is low; no secondary pollution is caused; and difficult problems such as large sludge landfill land occupation area, harm on ecological environment and human health, and high combustion cost are solved; sludge amount reduction, stabilization, harmless treatment, and resource utilization are realized.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, and more specifically relates to a method for preparing environmentally friendly materials by low-temperature carbonization of sludge produced in urban sewage treatment plants, which has simple process, low investment cost and no secondary pollution. Background technique [0002] With the rapid development of my country's socialism and the advancement of urbanization, the consumption of urban domestic water is increasing, and the amount of sewage that follows is increasing rapidly, which brings heavy pressure to the environment. For this reason, the country has built urban sewage treatment plants to improve the environment, and the efficiency of sewage treatment has increased rapidly. By the end of 2009, 1,993 sewage plants had been built nationwide, with a total treatment capacity of more than 100 million m3 / d, and 2,360 urban sewage plant projects were under construction, with a new se...

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Problems solved by technology

[0004] At present, the harmless disposal rate of sludge from urban sewage treatment plants in my country is low, and the disposal methods are as follows: after dehydration, it is directly transported to landfill for landfill, which is difficult to operate, and the leachate will cause re-pollution to the environment; incineration , high heat source consumption, high investment and operation costs; agricultural compost, the disadvantage is that the harmlessness is not thorough enough, heavy metals are easy to accumulate, and it occupies a large area, and the cycle is long; as building materials, there are defects in the process, and the problem of odor nuisance, etc.

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