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Sludge conditioner and sludge dewatering method thereof

A technology for sludge conditioning and water sludge, applied in the direction of dehydration/drying/thickened sludge treatment, etc., can solve problems such as complex preparation process, and achieve the effect of improving dehydration performance

Inactive Publication Date: 2011-09-07
JIANGHAN UNIVERSITY
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Problems solved by technology

Its processing object is concentrated sludge, and the composition of composite filter aid includes as many as 9 kinds, and the preparation process is complicated

Method used

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  • Sludge conditioner and sludge dewatering method thereof

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Embodiment Construction

[0021] The present invention is described further below by embodiment, and its purpose is in order to better understand content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0022] Table 1 lists the proportions of twelve examples, the preparation method of which is mechanical mixing.

[0023] Weigh the sludge sample to be conditioned in a 2000ml beaker, add a specified amount of conditioning agent, stir continuously at room temperature for 30min at a stirring speed of 400 rpm, and then pour it into a Buchner funnel. The sludge specific resistance adopts a conventional measurement method: the sludge dehydration test is carried out with a vacuum degree of 0.08MPa. Record the filtration time T, the filtrate volume V at the corresponding time and the total volume of the filtrate, and calculate the sludge specific resistance. The amount of water-containing sludge used in each experiment was 1000 g. The propo...

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Abstract

The invention belongs to the technical field of municipal sewage sludge treatment, and more particularly relates to a sludge conditioner prepared by ash produced after combustion of biomass pulverized fuel, and a sludge dewatering method thereof. The sludge conditioner is prepared by mixing the raw materials by weight percent: 30-95% of product obtained after the combustion of biomass granule fuel, 5-20% of quicklime powder and 0-50% of pulverized fuel ash. The sludge conditioner is added into water-containing sludge to be evenly stirred and then processed by mechanical dehydration, the water content of sludge mud cake can be reduced to 40-60%, and the sludge specific resistance is reduced to 10<-6>-10<-7>. The invention can solve the problem of deep dehydration of the sludge, and the dehydrated sludge can be used as soil, or raw material for producing clay or building material.

Description

technical field [0001] The invention belongs to the technical field of urban domestic sewage sludge treatment, in particular to preparing a sludge conditioner and a sludge dehydration method by utilizing the ash after burning biomass powder fuel. Background technique [0002] Sludge dewatering is one of the most expensive but extremely critical processes in sludge treatment. The performance of sludge dewatering is directly related to the quality of the entire sludge treatment system. Adding chemical agents to sludge before dehydration is a common and effective method adopted by countries all over the world. It can increase the dehydration rate of sludge, increase the solid content of the mud cake after dehydration, and the mud cake is easy to separate from the filter cloth. , thereby improving the efficiency of mechanical dehydration. At present, the research on the improvement of sludge dewatering performance is mainly in the following aspects: (1) Committed to exploring n...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/14
Inventor 余国贤吴宏观杜金萍万昆李忠铭
Owner JIANGHAN UNIVERSITY
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