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Oxidation-oriented catalyst used for sludge treatment

A sludge treatment and catalyst technology, applied in the direction of physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, oxidation treatment sludge, etc., can solve the problem of low sludge treatment efficiency and achieve strong adsorption capacity, improvement of processing efficiency, and effect of large specific surface area

Inactive Publication Date: 2013-04-10
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 efficiency of this method for sludge treatment is still not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The present invention has no special limitation on the preparation method of the oxidation-directed catalyst, and the technical scheme for preparing the composition well-known to those skilled in the art can be used. In the present invention, the above-mentioned components are preferably mixed uniformly to obtain the oxidation-directed catalyst.

[0031] Oxidation-guided catalyst provided by the present invention when used for sludge treatment O 3 The dosage is small, the efficiency is high, the pH value of the filtrate is close to neutral, and it can be directly discharged without polluting the environment.

[0032] The oxidation-guiding catalyst provided by the invention comprises the following components: 5wt%-45wt% metal compound; 55wt%-95wt% adsorbent. The present invention uses an oxidation-directed catalyst including a metal compound, which can be used as an oxidation initiator to promote the generation of hydroxyl radicals, which is beneficial to the digestion o...

Embodiment 1

[0037] According to the mass ratio of 75:25 carbon powder and FeCl 3 Mix and mix evenly to obtain an oxidation-guiding catalyst.

Embodiment 2

[0039] After adding 50 g of the oxidation-directing catalyst prepared in Example 1 to the remaining sludge containing 1 kg of dry basis, 0.5 g of ozone was introduced into it under stirring conditions, and the resulting mixture was subjected to gravity sedimentation for 30 minutes, and then the supernatant liquid export.

[0040] The present invention detects and obtains the moisture content of the excess sludge after pressure filtration to be 50%;

[0041] The COD of the supernatant detected by the present invention is 120mg / L.

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PUM

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Abstract

The invention provides an oxidation-oriented catalyst used for sludge treatment. The oxidation-oriented catalyst for sludge treatment comprises the following components in percentage by weight: 5-45% of metal compound and 55-95% of adsorbent. The oxidation-oriented catalyst comprises the metal compound, so that the oxidation-oriented catalyst can be used as an oxidation initiator to promote the generation of hydroxyl radicals and decompose organic matters in sludge; the oxidation-oriented catalyst comprises the adsorbent, so that the oxidation-oriented catalyst has a larger specific surface area and a strong adsorption capacity and can efficiently adsorb solid granular matters in the sludge from gas or liquid; and during the sludge treatment, an acidity and alkalinity regulator is not required to be added into the oxidation-oriented catalyst, so that membrane condensation on the surface of a microbial extracellular polymeric substance (EPS) is avoided, membrane rupture and decomposition of the EPS in the sludge are facilitated, and thus the sludge treatment efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, and more specifically relates to an oxidation-guided catalyst for sludge treatment. 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 0 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 larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/128B01J31/04B01J31/38B01J31/30B01J20/20C02F11/06
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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