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Method for harmless treatment of municipal sludge

A treatment method, the technology of urban sludge, applied in the field of environmental protection and pollutant treatment, can solve the problems of difficult promotion and high cost of biological pesticides, and achieve the effect of reducing production costs

Inactive Publication Date: 2012-05-30
DALIAN CHUANGDA TECH TRADE MARKET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high cost of biopesticides, it has been difficult to promote them for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0037] Processing technology of the present invention carries out according to the following steps:

[0038] (1) Detect the sulfur content in the sludge;

[0039] (2) Detect the sulfur content in the heating flue gas;

[0040] (3) Calculate the dosage of lime powder and slaked lime;

[0041] (4) Put the lime powder into the sludge and stir to decompose the sulfur-containing organic matter in the sludge

[0042] The colony decomposes and forms stable non-toxic substances such as calcium sulfate to achieve sludge deodorization;

[0043] (5) The dried tail gas is treated again through water film dedusting.

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Abstract

The present invention relates to a method for harmless treatment of municipal sludge, which belongs to the technical field of environmental protection and pollutant treatment. The prior municipal sludge treatment method mainly includes landfill and incineration, and has the problems of high investment and secondary pollution. The harmless treatment method comprises dewatering sludge, mixing with hull, sterilizing at a high temperature, inoculating Metarhizium, and performing aerobic fermentation to obtain biological pesticide containing Metarhizium. The invention is suitable for producing cheap biological pesticide with municipal sludge as raw material, achieves harmless treatment of municipal sludge, and simultaneously utilizes municipal sludge resources effectively. The inventive product can be used as both biological pesticide and fertilizer, and is widely applicable for upland field crops, nursery stocks, flowers and lawns.

Description

technical field [0001] The invention relates to a method for treating urban sludge, in particular to a method for treating urban sludge in a harmless urban sewage treatment plant, and belongs to the technical field of environmental protection and pollutant treatment. Background technique [0002] With the acceleration of urbanization, the amount of urban sewage treatment has increased year by year, and the sludge output of urban sewage treatment plants has also increased sharply. Sludge that has not been properly treated and disposed of enters the environment, directly causing secondary pollution to water bodies and the atmosphere, which not only reduces the effective treatment capacity of the sewage treatment system, but also poses a serious threat to the ecological environment and human living environment. Municipal sludge treatment and disposal methods mainly include landfill, incineration, etc., but these methods all exist [0003] The investment is large, and there is ...

Claims

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Application Information

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IPC IPC(8): C05G3/00C02F11/00C02F11/02A01N63/04A01P7/04
CPCY02W10/20
Inventor 陈洋
Owner DALIAN CHUANGDA TECH TRADE MARKET