Sludge treatment method for catalyzing persulfate by plasmas

A persulfate and plasma technology, applied in water/sludge/sewage treatment, oxidation treatment of sludge, chemical instruments and methods, etc., can solve problems such as secondary pollution and achieve the effect of strong oxidizing ability

Inactive Publication Date: 2018-07-27
江苏沃青环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of secondary pollution caused by the organic pollutants carried in the sludge, and to provide a simple, efficient and wider application range of sludge harmless treatment technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: In the reaction chamber, adjust the moisture content of the sludge to 98%; transport the sodium persulfate with a mass of 20.1% of the mud-water mixture into the reaction chamber; and use a high-frequency high-voltage electric field to excite industrial steam to generate plasma to generate 260 ° C, 6 MPa reaction conditions; under the catalysis of the above-mentioned high temperature, high pressure and plasma, sodium persulfate molecules generate a large number of sulfate radicals in water, which fully contact and react with organic pollutants in the mud-water mixture; detect the COD of the mud-water mixture after 45 minutes of reaction; The above sludge-water mixture is dehydrated to obtain the final sludge product.

[0017] Test result: COD=8930mg / L before mud-water mixture treatment

[0018] COD=29mg / L after mud-water mixture treatment

[0019] It can be seen from the test results that the removal rate of organic pollutants in sludge by this method is clo...

Embodiment 2

[0020] Example 2: In the reaction chamber, adjust the moisture content of the sludge to 98.5%; transport sodium persulfate with a mud-water mixture mass of 20.1% to the reaction chamber; and use a high-frequency high-voltage electric field to excite industrial steam to generate plasma to generate 300 ° C, 8 MPa reaction conditions; under the catalysis of the above-mentioned high temperature, high pressure and plasma, sodium persulfate molecules generate a large number of sulfate radicals in water, which fully contact and react with organic pollutants in the mud-water mixture; detect the COD of the mud-water mixture after 35 minutes of reaction; The above sludge-water mixture is dehydrated to obtain the final sludge product.

[0021] Test result: COD=8930mg / L before mud-water mixture treatment

[0022] COD=17mg / L after mud-water mixture treatment

[0023] It can be seen from the test results that the removal rate of organic pollutants in sludge by this method is close to 99.81...

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Abstract

The invention discloses a sludge treatment method for catalyzing persulfate by plasmas, belongs to the field of solid waste treatment in environmental engineering, and mainly aims to solve the problemof secondary pollution caused by organic pollutants in sludge. The method is characterized by including the steps: adjusting the water content of the sludge to reach 98%-98.5% in a reaction chamber;taking the persulfate as an oxidizing agent, and conveying the persulfate into the reaction chamber; forming a reaction condition with the temperature of 260-300 DEG C and the pressure intensity of 6-8 MPa by the aid of a mode that a high-frequency and high-voltage electric field stimulates industrial steam to generate the plasmas. The persulfate can generate a lot of sulfate radicals in water athigh temperature and under high pressure and under the catalytic action of the plasmas, has high oxidizing ability and can oxidize and decompose various organic pollutants in the sludge within 34-45 minutes, and final sludge products are acquired in a dewatering manner.

Description

technical field [0001] The invention relates to the field of solid waste treatment in environmental engineering, in particular to a sludge treatment method using plasma to catalyze persulfate. Background technique [0002] With the acceleration of my country's urbanization process, the water consumption of urban residents and industries has increased sharply, and the subsequent sewage discharge has also increased day by day, which has led to the increasingly serious water pollution situation in my country. At the same time, sludge, as a by-product in the sewage treatment process, has gradually been valued by the state and local governments. [0003] However, because the sludge contains a large amount of organic pollutants, especially the high molecular organic pollutants contained in the sludge produced by industrial sewage treatment, it often leads to secondary pollution to the environment. [0004] Therefore, it is necessary to carry out a certain degree of harmless treat...

Claims

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Application Information

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IPC IPC(8): C02F11/06C02F101/30
CPCC02F11/06C02F2101/30
Inventor殷衡
Owner江苏沃青环保科技有限公司