Organic sludge dehydration method

A technology of organic sludge and inorganic sludge, applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc. It can improve the efficiency of solid-liquid separation, improve the dehydration effect, and save the transportation cost.

Inactive Publication Date: 2020-01-17
SUZHOU SUJING ENVIRONMENTAL ENG
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  • Abstract
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Problems solved by technology

This method has a good effect on sludge dewatering, but it has high requirements for equipment and chemicals, high cost and high energy consumption, which is not conducive to large-scale application
At present, the most widely used flocculants in the sewage treatment industry are inorganic flocculants and organic flocculants. The inorganic flocculants are mainly iron-based and aluminum-based. Although their prices are low and they are easy to store, their flocculation effects are poor. The amount of mud required is large; while organic flocculants have better flocculation effects, but their cost is high and the solution preparation is cumbersome, requiring the purchase of equipment such as medicine soaking machines, which is not conducive to large-scale application

Method used

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  • Organic sludge dehydration method

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example 1

[0034] Example 1. The following is a sewage treatment station in Suzhou that adopts the above-mentioned organic sludge dehydration method for treatment. At present, the sewage treatment station is limited by the small area and the investment cost. The sludge concentration technology is not designed, so it only uses The plate and frame filter press directly dehydrates organic sludge mechanically, but the dehydration effect is very poor. After dehydration, the sludge does not form and has a high water content.

[0035] The inorganic sludge and organic sludge at a certain time point are treated by the above method, and the moisture content of the organic sludge is about 98% and the moisture content of the inorganic sludge is about 97.5% after testing;

[0036] Mix and stir the above-mentioned organic sludge and inorganic sludge containing inorganic particles for 25 minutes, during which the method of aeration and stirring is adopted, and the mass ratio of the two materials is 6:1,...

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Abstract

The invention discloses an organic sludge dehydration method. The dehydration method comprises the steps that organic sludge and inorganic sludge containing inorganic particles are mixed, stirred andthen mechanically dehydrated, and mixed sludge with water content lower than 75% can be prepared, wherein the water content of the organic sludge and the water content of the inorganic sludge are greater than or equal to 95% respectively, and the feeding mass ratio of the inorganic sludge to the organic sludge is 5-7:1. According to the thought of "waste control by waste", the inorganic sludge inthe same sewage treatment plant is utilized to treat the organic sludge, the dehydration effect of the organic sludge is improved, and dehydration cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a method for dehydrating organic sludge. Background technique [0002] The water content of various sludges produced by sewage treatment plants is extremely high, up to 99%, and in addition to bacterial micelles, the sludge also contains toxic and harmful pollutants and heavy metal elements. It is easy to cause secondary pollution. At present, the commonly used sludge treatment technologies are mainly sanitary landfill, dry incineration and recycling, etc., but these technologies have high requirements on the moisture content of sludge. Therefore, if the sludge dehydration effect can be effectively improved, the sludge volume can be reduced and Reduce the difficulty of sludge treatment in the next step. [0003] At present, the commonly used sludge dewatering technologies include traditional sludge dewatering technology and mechanical sludge dewatering tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/122
CPCC02F11/122
Inventor 孙华马楫沈培新王明泽方东奇
Owner SUZHOU SUJING ENVIRONMENTAL ENG
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