Method for improving dewatering property of remained active sludge of sewage treatment plant

A technology for residual activity and sludge dewatering, which is applied in the oxidation treatment of sludge, water/sludge/sewage treatment, sludge treatment, etc., and can solve the problems of large dosage of inorganic coagulants and high price of polyacrylamide. , to achieve the effect of reducing transportation costs, reducing the volume of mud cakes, and high efficiency

Active Publication Date: 2018-06-19
HUAQIAO UNIVERSITY
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Problems solved by technology

However, the inorganic coagulant has the disadvantages of large dosage and its own corrosion; while the organic polymer flocculant polyacrylamide is more expensive

Method used

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  • Method for improving dewatering property of remained active sludge of sewage treatment plant
  • Method for improving dewatering property of remained active sludge of sewage treatment plant
  • Method for improving dewatering property of remained active sludge of sewage treatment plant

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Embodiment 1

[0023] A method for improving the dehydration performance of excess activated sludge in a sewage treatment plant, characterized in that: the strong oxidation of peracetic acid and the flocculation of cationic polyacrylamide are used to reduce the water content of the treated mud cake and reduce the sludge volume, including the following steps:

[0024] (1) Pass the remaining activated sludge to be treated through a 40-mesh sieve to remove large suspended particles, let it stand for 20-30 minutes, and discard the supernatant; the above-mentioned remaining activated sludge to be treated is taken from the reclaimed water treatment station of Huaqiao University Xiamen Campus secondary settling tank;

[0025] (2) in the material of step (1) gained, add the peracetic acid solution of 103.5mg / gMLSS, with the stirring reaction 30min of the rotating speed of 200r / min with six mixers;

[0026] (3) Add 20-70mg / L (preferably 40-50mg / L) of 0.1% cationic polyacrylamide aqueous solution to ...

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Abstract

The invention discloses a method for improving dewatering property of remained active sludge of a sewage treatment plant. The method is characterized in that the water content of treated sludge cake is reduced by utilizing the strong oxidizing property of peracetic acid and the flocculation function of cationic type polyacrylamide, and the volume of sludge is reduced. The method for improving thedewatering property of the remained active sludge by jointly using the peracetic acid and the cationic type polyacrylamide has the advantages that the operation type is simple, the dewatering propertyof the sludge can be effectively improved, the volume of the sludge cake is reduced, and the transportation cost and other costs in the subsequent sludge cake treatment process are reduced.

Description

technical field [0001] The invention belongs to the technical field of urban sewage treatment, and in particular relates to a method for improving the dewatering performance of residual activated sludge in a sewage treatment plant. Background technique [0002] With the rapid development of my country's economy, people's living standards are improving day by day, the urban population is increasing day by day, and the amount of urban sewage discharge is increasing day by day, resulting in the deterioration of the water environment and the increasingly serious problem of urban sewage treatment. With the enhancement of people's awareness of environmental protection, environmental protection policies have been improved year by year. On the basis of improving the treatment process of existing sewage treatment plants, my country has built a large number of medium and small sewage treatment plants, and the urban sewage treatment capacity is increasing day by day. What followed was a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C02F11/06C02F11/00
CPCC02F11/00C02F11/06C02F11/14
Inventor 苑宝玲刘春骁付明来周真明
Owner HUAQIAO UNIVERSITY
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