Method for fully recycling sludge

A technology of resource utilization and sludge, applied in the direction of chemical instruments and methods, sludge treatment, sewage/sludge fertilizer, etc., can solve the problems of sludge discharge, sewage treatment plant surplus, etc., to reduce environmental pollution, reduce costs, The effect of solving the problem of sludge treatment

Inactive Publication Date: 2011-10-05
江苏辉翔环保科技有限公司
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Problems solved by technology

[0006] Based on the defects of the above-mentioned sludge treatment and disposal technology and the actual needs of sludge treatment and disposal, in order to solve the problem of excess sludge discharge in existing sewage treatment plants, an economical,

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  • Method for fully recycling sludge
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[0016] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0017] The residual sludge treatment mode of most sewage treatment plants is that after the surplus sludge is concentrated in the sewage plant, the sludge is dewatered to a moisture content of about 80% by mechanical dehydration, and then transported for landfill, composting or incineration. This model not only increases the cost of sludge transportation, but also causes secondary pollution. The process of the invention can be applied to the construction or transformation of on-site sludge treatment facilities of sewage treatment plants, and can also be used in sludge treatment plants.

[0018] Such as figure 1 As shown, the equipment of the present invention is: mechanical screen 1, sludge adjustment tank 2, sludge lifting pump 3, sludge hydrolysis dosing system 4, sludge hydrolysis reaction tank 5, calcium chloride dosing system 6, flocculation Sedime...

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Abstract

The invention relates to sewage treatment and solid waste treatment in the environmental engineering field and aims at recycling the excess sludge in a sewage treatment plant. A hydrolyzed solution, which is obtained after the sludge is hydrolyzed, can be used as a flocculating agent which directly flows back for sewage treatment; a calcium chloride solution can be added into the hydrolyzed solution, so that supernatant liquor which contains the biological flocculating agent and bottom sediments which mainly comprise inorganic matters and a small amount of unhydrolyzed organic matters are separated; a crude flocculation solution is obtained by centrifuging the supernatant liquor which contains the flocculating agent; and a flocculating agent crude product can be obtained after the crude flocculation solution reacts with acetone and a reaction product is centrifuged. After being treated, the bottom sediments which mainly comprise the inorganic matters and a small amount of unhydrolyzedorganic matters can be used as a chemical fertilizer. In the invention, after being treated, the sludge is recycled, the purpose of zero sludge discharge is achieved finally, the sludge treatment problem of the sewage treatment plant is thoroughly solved, the cost of water treatment is lowered and the environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of sludge treatment in sewage treatment plants, and is a method for completely recycling sludge, which aims at resource utilization of excess sludge to prepare products and prevents sewage treatment plants from discharging excess sludge to the outside. Background technique [0002] With the development of my country's economy, the municipal sewage treatment capacity has been continuously enhanced, the sewage treatment rate has continued to increase, and the environmental pollution problems caused by municipal sewage have been gradually resolved. However, there has always been a tendency to treat heavy wastewater and light sludge. Many cities have not considered sludge treatment as a necessary part of the sewage plant. It is often a long time before the sludge treatment system is built after the sewage treatment plant is completed. , or the sludge treatment system has not been well run, resulting in a very low...

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Application Information

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IPC IPC(8): C02F11/00C02F1/52C05F7/00
CPCY02A40/20
Inventor 傅翔周集体
Owner 江苏辉翔环保科技有限公司
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