Efficient harmless treatment method for municipal sludge

Abstract

The invention relates to the technical field of municipal sludge treatment, in particular to an efficient harmless treatment method for municipal sludge. The efficient harmless treatment method comprises the following specific steps: 1) crushing municipal sludge with water content of 50-65%, which is pressed and filtered by a sheet frame; 2) conveying the crushed municipal sludge into a reaction kettle, and adding organic substances which account for 18-22% of the weight of the municipal sludge in the step 1); 3) adding a harmless treatment agent which accounts for 4%-6% of the total weight ofthe municipal sludge and the organic substances in the step 2) into the reaction kettle; 4) stirring a mixture in the reaction kettle in the step 3) in the morning, at noon and on the evening every 3-5 hours per day, wherein stirring time lasts for 18-22 minutes every time, and stirring lasts for 6-8 days. The efficient harmless treatment method for the municipal sludge adopts stirring and ventilating to cool and remove vapor, avoids use of aeration equipment, and reduces grade requirements of the reaction kettle; and the harmless treatment agent can treat harmful substances such as harmful bacteria and heavy metal in THE municipal sludge better.

Description

technical field [0001] The invention relates to the technical field of municipal sludge treatment, in particular to a method for efficient and harmless treatment of municipal sludge. Background technique [0002] The output of municipal sludge in my country is increasing year by year, and now it produces about 40 million tons per year. Municipal sludge (water content 80%) is expected to reach 60-90 million tons by 2020. The efficiency of mud is low, and there is a lack of processing technology with independent intellectual property rights. Municipal sludge reduction, harmlessness, and recycling are the three principles of circular economy. At the 100th anniversary of the birth of activated municipal sludge in 2014, scientists all believed that the three principles are that resources and energy must be obtained from municipal sludge. , to maximize the recycling of organic matter. In Britain, France, Germany and other countries, the harmless treatment and resource utilization...

AI Technical Summary

Problems solved by technology

[0003] At present, some new methods and new technologies are disclosed, but there are deficiencies in the actual application. A drying device is required in the treatment process: aeration device, aeration and drying, uneven moisture content, long treatment process time, and strong odor during treatment. The environment is not friendly, the amount of treatment is small, the conditions are harsh, and there are problems such as secondary pollution, so it is difficult to promote