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A method of treating sludge

A technology of sludge and oxidant, applied in the direction of oxidation treatment of sludge, etc., can solve the problems of high chemical oxygen demand of sludge, aggravating environmental pollution, etc., and achieve benefits for subsequent treatment, high dehydration rate, and small sludge increment Effect

Inactive Publication Date: 2017-03-15
湖南清和环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sludge treated by the method disclosed in this patent still has a high chemical oxygen demand, and direct discharge into the environment will aggravate environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] In the remaining sludge containing 1kg dry basis, adding 50g mass ratio is carbon powder and FeCl mixture of 80:20, under the condition of stirring, feeds 0.5g ozone therein, and stirring makes it fully react; Then to obtain Add 0.5g of coagulation agent containing 50wt% FeCl3, 40wt% PAC and 10wt% CPAM to the reaction product, and filter the remaining sludge after the stirring reaction is complete to complete the treatment of the remaining sludge.

[0061] The present invention detects that the moisture content of the remaining sludge after treatment is 50%;

[0062] The COD of the filtrate that the present invention detects is 120mg / L.

Embodiment 2

[0064] Add 0.35kg of a mixture of activated carbon powder, fly ash, iron formate and aluminum formate in a mass ratio of 35:40:10:15 to the remaining sludge containing 10kg dry basis; then pass 8g of it under stirring conditions Ozone, and stir to make it react fully; Then add 10g of FeCl containing 55wt% in the reaction product obtained 3 , 35wt% PAC and 10wt% CPAM coagulant, after the stirring reaction is complete, filter the remaining sludge to complete the treatment of the remaining sludge.

[0065] The present invention detects that the moisture content of the remaining sludge after treatment is 48%;

[0066] The COD of the filtrate that the present invention detects is 85mg / L.

Embodiment 3

[0068] Add 3.25kg of carbon powder, FeCl 3 And the mixture of iron acetate, under the condition of stirring, pass into 15g ozone wherein, and stir to make it fully react; Then add 1kg FeCl containing 45wt% to the obtained reaction product 3 , 35wt% PAC and 20wt% CPAM coagulant, after the stirring reaction is complete, filter the remaining sludge to complete the treatment of the remaining sludge.

[0069] The present invention detects that the moisture content of the excess sludge after treatment is 30%;

[0070] The COD of the filtrate that the present invention detects is 100mg / L.

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PUM

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Abstract

The invention provides a sludge processing method which comprises the following steps: a) mixing to-be-treated sludge with an oxidant and an oxidation guide catalyst for reaction; and b) mixing a reaction product obtained by the step a) with a coagulation agent for filtration. The oxidation guide catalyst comprises the following components: 5wt%-45wt% of a metal compound and 55wt%-95wt% of an adsorbent. According to the method, firstly the to-be-treated sludge is mixed with the oxidant and the oxidation guide catalyst for oxidation reaction, and the obtained reaction product is mixed with the coagulation agent for filtration, so that the sludge processing is completed. According to the method, hydrogen peroxide and ozone is used as the oxidant, and the oxidation guide catalyst is added, so that membrane breaking and decomposition of microbial extracellular polymers in sludge can be facilitated, the content of reduction materials in the sludge can be reduced, and chemical oxygen demand of the treated sludge is reduced.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, and more specifically relates to a method for treating sludge. Background technique [0002] After the sewage is treated, a large amount of residual sludge will be produced. The treatment and disposal of excess sludge is a major problem in sewage biochemical treatment. The basic principle of secondary biochemical treatment of sewage plant sewage is that microorganisms use organic matter in sewage as nutrients for their own metabolism, decompose them, and convert them into CO 2 、H 2 O and metabolic secretions. The residual secretions produced by the metabolism of microorganisms form excess sludge, which aggregates with scum in sewage and microbial clusters to form excess sludge in sewage plants, which is a secondary product after biochemical treatment of sewage in sewage plants. It has also become urban solid waste. [0003] As we all know, sludge contains a large number of harmful m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/06
Inventor 李志光刘海林李明松
Owner 湖南清和环保技术有限公司
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