Method for reduction and detoxification of hazardous waste sludge

A technology for waste sludge and sludge, applied in the fields of sludge detoxification, sludge treatment, biological sludge treatment, etc., can solve the problems of secondary pollution reduction effect, long treatment time, high treatment cost, and achieve environmental benefits And the effect of good social benefit, increasing concentration and high sludge reduction rate
CN110217967AInactive Publication Date: 2019-09-10NANJING NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING NORMAL UNIVERSITY
Publication Date
2019-09-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for reduction and detoxification of hazardous waste sludge. The method comprises the steps: adding a microbial bacterial agent to the sludge, adding an auxiliary material for conditioning, providing an external heating source, performing continuous stirring, and performing aeration, wherein the sludge is chemical hazardous waste sludge with a water content of 80% or above, the water content is 70% after the auxiliary material is added, and the microbial bacterial agent is complex bacteria. According to the method, bio-thermal energy generated through degradation of organic matter in the microorganism high-temperature process and the complex bacteria are utilized to decompose the organic matter, destroy the aggregate structure and disperse the sludge particles, the interstitial moisture and surface moisture are turned into free water, the binding force is weakened, and the removal difficulty is reduced; and in addition to the auxiliary heat, the temperature inside a box body is kept at 60-80 DEG C. According to the method, the optimal control conditions in the process of reduction and detoxification are determined, the method has the advantages of ahigh degree of reduction, high detoxification efficiency, low treatment cost, a high comprehensive utilization rate, no secondary pollution, simple operation and the like, and the economy benefits, environmental benefits and social benefits are good.
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Description

technical field

[0001] The invention belongs to sludge treatment technology, in particular to a method for reducing and detoxifying hazardous waste sludge. Background technique

[0002] Chemical enterprises produce a large amount of sludge, which has the characteristics of high moisture content, large total amount, and most of them are hazardous waste and high toxicity. In recent years, the state has improved the standardization of disposal of hazardous waste sludge. On August 1, 2016, the "National Hazardous Waste List" was implemented. Among them, there are 93 types of hazardous waste related to sludge. The cost of hazardous waste sludge incineration is extremely high, at 8,000 yuan / ton, while the "Environmental Protection Tax Law" implemented in 2018 added a hazardous waste tax of 1,000 yuan / ton. The cost and pressure of chemical sludge treatment have greatly increased, and the reduction of chemical sludge in enterprises is imminent. The bottleneck of chemical hazardous ...

Claims

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