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Preparation method of alkaline sewage treating agent

A sewage treatment agent, alkaline sewage technology, applied in water/sewage treatment, water treatment parameter control, neutralized water/sewage treatment, etc., can solve the problem of reducing the utilization value of activated sludge, and achieve low cost and good effect , the effect of simple operation

Inactive Publication Date: 2016-12-07
米桂琼
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the treatment technology of domestic sewage and industrial wastewater is mostly activated sludge method, and the utilization value of the remaining activated sludge after treatment is generally reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method of alkaline sewage treatment agent, the steps are as follows:

[0019] (1) Add 20% hydrochloric acid to the alkaline sewage to adjust the pH to 2 and filter it;

[0020] (2) Add a small amount of zeolite to the filtrate and heat to 55°C;

[0021] (3) Centrifuge the solution in step (2) for 5 minutes;

[0022] (4) Add polyaspartic acid, magnesium sulfate, silicon dioxide, bentonite, ferric chloride, aluminum dihydrogen phosphate, and chlorine tablets in sequence to the solid matter obtained after centrifugation, stir while adding, and let stand for 3 minutes;

[0023] (5) Dry the mixture and put it into a granulator for granulation. Wherein, in step (4), the weight ratio of solid matter to polyaspartic acid, magnesium sulfate, silicon dioxide, bentonite, ferric chloride, aluminum dihydrogen phosphate, and chlorine flakes is: 100:30:10:30:10 :10:5:5.

[0024] The sewage treatment agent prepared by the method of the invention has a BOD removal rate...

Embodiment 2

[0026] A preparation method of alkaline sewage treatment agent, the steps are as follows:

[0027] (1) Add 20% hydrochloric acid to the alkaline sewage to adjust the pH to 3 and filter it;

[0028] (2) Add a small amount of zeolite to the filtrate and heat to 45°C;

[0029] (3) Centrifuge the solution in step (2) for 8 minutes;

[0030] (4) Add polyaspartic acid, magnesium sulfate, silicon dioxide, bentonite, ferric chloride, aluminum dihydrogen phosphate, and chlorine tablets in sequence to the solid matter obtained after centrifugation, stir while adding, and let stand for 5 minutes;

[0031] (5) Dry the mixture and put it into a granulator for granulation. Wherein, in step (4), the weight ratio of solid matter to polyaspartic acid, magnesium sulfate, silicon dioxide, bentonite, ferric chloride, aluminum dihydrogen phosphate, and chlorine flakes is: 100:15:20:15:20 :18:10:2.

[0032] The sewage treatment agent prepared by the method of the invention has a BOD removal rat...

Embodiment 3

[0034] A preparation method of alkaline sewage treatment agent, the steps are as follows:

[0035] (1) Add 20% hydrochloric acid to the alkaline sewage to adjust the pH to 2 and filter it;

[0036] (2) Add a small amount of zeolite to the filtrate and heat to 50°C;

[0037] (3) Centrifuge the solution in step (2) for 6 minutes;

[0038] (4) Add polyaspartic acid, magnesium sulfate, silicon dioxide, bentonite, ferric chloride, aluminum dihydrogen phosphate, and chlorine tablets in sequence to the solid matter obtained after centrifugation, stir while adding, and let stand for 4 minutes;

[0039] (5) Dry the mixture and put it into a granulator for granulation. Wherein, in step (4), the weight ratio of solid matter to polyaspartic acid, magnesium sulfate, silicon dioxide, bentonite, ferric chloride, aluminum dihydrogen phosphate, and chlorine flakes is: 100:22:15:22:15 :15:8:3.

[0040] The sewage treatment agent prepared by the method of the invention has a BOD removal rate...

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PUM

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Abstract

The invention discloses a preparation method of an alkaline sewage treating agent. Residual activated sludge in sewage treatment is treated and mixed with other auxiliaries, the sewage treating agent is prepared, the operation is simple, and the prepared sewage treating agent is low in cost, good in effect and suitable for large-scale production. By means of the sewage treating agent prepared with the method, the BOD (biochemical oxygen demand) removal rate of sewage after treatment is larger than 97%, the COD (chemical oxygen demand) removal rate is larger than 98%, the total nitrogen removal rate is larger than 97%, and the PH (potential of hydrogen) of a solution after treatment is stabilized at 5-7.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a preparation method of an alkaline sewage treatment agent. Background technique [0002] At present, the treatment technology of domestic sewage and industrial wastewater is mostly activated sludge method, and the utilization value of the remaining activated sludge after treatment is generally reduced. The remaining sludge mainly contains a large amount of microorganisms, polysaccharides, proteins and cellulose substances, etc. It can still be used as a biological sewage treatment agent in sewage treatment, and the cost is low, but the effect of the remaining activated sludge after wastewater treatment is poor when used directly. The pertinence is not strong, therefore, how to recycle the remaining activated sludge into an efficient sewage treatment agent is a problem that needs to be solved at present. Contents of the invention [0003] The object of the present inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F1/66
CPCC02F1/00C02F1/66C02F2209/06C02F2209/08C02F2209/16
Inventor 米桂琼
Owner 米桂琼