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Residual active sludge dehydration filter aid and application thereof

A residual activity and sludge dehydration technology, applied in water/sludge/sewage treatment, application, sludge treatment, etc., can solve the problems of increased absolute dry sludge, easy clogging of sludge particles, high cost, etc., and achieve less water content , Improve the flocculation effect, the effect of simple equipment

Active Publication Date: 2019-06-14
广东省科学院生物与医学工程研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above conditioners have problems such as increased absolute dry sludge volume, high cost, and easy clogging of sludge particles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of graft expanded bagasse, its preparation method is as follows:

[0034] 1) bagasse drying, control bagasse moisture ≤ 55%;

[0035] 2) bagasse after drying is carried out graft expansion processing:

[0036] a) Mix bagasse with NaOH (solid), cationic polyacrylamide, and cross-linking agent at a mass ratio of 2000:4:20:1, adopt air-flow puffing process, puffing temperature is 200°C, pressure is 1MPa, and puffing time is 4min to obtain bagasse A;

[0037] b) Mix bagasse with NaOH (solid), anionic polyacrylamide, and cross-linking agent at a mass ratio of 2000:4:20:1, adopt air-flow puffing process, puffing temperature is 200°C, pressure is 1MPa, and puffing time is 4min to obtain bagasse B;

[0038] c) bagasse A and bagasse B are mixed in a ratio of 1:3 to obtain grafted and expanded bagasse;

[0039] The cross-linking agent is a short-chain fatty acid ester.

[0040] A filter aid for dewatering excess activated sludge, which is prepared by mixing the above-...

Embodiment 2

[0047] A kind of graft expanded bagasse, its preparation method is as follows:

[0048] 1) bagasse drying, control bagasse moisture ≤ 55%;

[0049] 2) bagasse after drying is carried out graft expansion processing:

[0050] a) Mix bagasse with NaOH (solid), cationic polyacrylamide, and cross-linking agent in a ratio of 4000:4:20:1, adopt air-flow puffing process, puffing temperature is 200°C, pressure is 1MPa, puffing time is 4min, and bagasse A is obtained ;

[0051] b) Bagasse, NaOH (solid), anionic polyacrylamide, and cross-linking agent are mixed evenly at a ratio of 4000:4:20:1, and the air-flow puffing process is adopted, the puffing temperature is 200°C, the pressure is 1MPa, and the puffing time is 4min to obtain bagasse B ;

[0052] c) bagasse A and bagasse B are mixed in a ratio of 1:3 to obtain grafted and expanded bagasse;

[0053] The cross-linking agent is a short-chain fatty acid ester.

[0054] A filter aid for dewatering excess activated sludge, which is ...

Embodiment 3

[0061] A kind of graft expanded bagasse, its preparation method is as follows:

[0062] 1) bagasse drying, control bagasse moisture ≤ 55%,

[0063] 2) bagasse after drying is carried out graft expansion processing:

[0064] a) Mix bagasse with NaOH (solid), cationic polyacrylamide, and cross-linking agent at a ratio of 2000:4:20:1, adopt air-flow puffing process, puffing temperature is 200°C, pressure is 1MPa, puffing time is 4min, and bagasse A is obtained ;

[0065] b) Mix bagasse with NaOH (solid), anionic polyacrylamide, and cross-linking agent in a ratio of 2000:4:20:1, adopt air-flow puffing process, puffing temperature is 200°C, pressure is 2MPa, puffing time is 4min, and bagasse B is obtained ;

[0066] c) bagasse A and bagasse B are mixed in a ratio of 1:3 to obtain grafted and expanded bagasse;

[0067] The cross-linking agent is a short-chain fatty acid ester.

[0068] A filter aid for dewatering excess activated sludge, which is prepared by mixing the above-me...

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PUM

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Abstract

The invention discloses a residual active sludge dehydration filter aid and application thereof. The filter aid is selected from at least one of grafted puffed bagasse and sugarcane chaff. The filteraid provided by the invention can greatly improve the filter-press effect and efficiency, the water content of filter cake and the chemical oxygen demand (CODcr) of filtered liquid are lowered after dehydration, and the whole filter-press process is smooth, safe, easy in operation, needs simple equipment, and small investment, and has very good economical benefit and wide social benefit. The filter cake prepared by a dehydration method can be used for preparing a water body purifying material, so that the problem of residual active sludge in the sewage treatment process is transformed into a sewage treatment method, waste is changed into treasure, a closed loop is formed, and resource utilization of the residual active sludge is realized. The filter cake prepared by the dehydration methodcan also be used for preparing biological organic fertilizers, thereby realizing the resource utilization of the residual active sludge.

Description

technical field [0001] The invention relates to the technical field of excess activated sludge treatment, in particular to an excess activated sludge dewatering filter aid and application thereof. Background technique [0002] Activated sludge method is a widely used sewage treatment technology, which can remove dissolved and colloidal biodegradable organic matter and suspended solids adsorbed by activated sludge from sewage, but a large amount of residual waste will be generated during the treatment process. activated sludge. Excess activated sludge is an extremely complex heterogeneous body composed of organic matter fragments, bacterial cells, inorganic particles and colloids. A mixture of individuals. In addition, the remaining sludge also contains most of the organic matter, which contains about 60% to 70% of crude protein and about 25% of carbohydrates. Excess activated sludge has a large capacity, is easy to be corrupted, and has a foul smell. If it is not treated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/147C02F11/122C02F11/12B01J20/22B01J20/24B01J20/26C02F1/00C02F1/28B01J20/20C05F7/00
CPCY02A40/20
Inventor 刘桂云曾练强钟志才梁达奉黄玉南蚁细苗柳颖吴兆鹏常国炜
Owner 广东省科学院生物与医学工程研究所
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