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A kind of sewage treatment method

A sewage treatment plant and sewage technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problem of low efficiency, low degree of automation, and no consideration of phosphorus removal Denitrification function and other issues, to achieve the effect of dealing with a wide range of pollutants, good economic and social benefits, and wide sources of raw materials for production

Inactive Publication Date: 2016-08-24
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, my country's sewage treatment technology has followed the route and treatment technology of European and American countries for nearly a hundred years. While absorbing and digesting foreign technology, it has also formed its own technology. Urban sewage treatment technology has made great progress, but The sewage treatment technology adopted in my country at this stage is still very backward compared with the technical level of foreign countries in the same period, and there are always shortcomings such as low efficiency, high energy consumption, high maintenance rate, and low degree of automation.
It is also due to the deviation in the understanding of urban sewage in the past, which also caused the inherent deficiencies in the process of urban sewage treatment.
At present, a considerable number of sewage treatment plants that have been built in cities adopt primary treatment or primary enhanced treatment, and some secondary treatment processes do not consider the function of phosphorus and nitrogen removal, and the effluent has no disinfection process, which is not suitable for urban sewage treatment and recycling. requirements

Method used

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  • A kind of sewage treatment method
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Experimental program
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Embodiment 1

[0009] The modified polysilicate microgel flocculant is prepared by the following method:

[0010] Under high-speed stirring conditions, 400kg of sodium silicate with a silicon dioxide concentration of 5wt% was added to 100ppm of silicon dioxide powder, and vigorously stirred in a drum stirring device to keep the Reynolds number of the liquid during the stirring process at 10000, and then use The dilute sulfuric acid with a concentration of 20wt% by weight was acidified until the pH of the solution was 10, and at the same time, the instant viscosity of the mixed solution was measured as 20 mPa·S by an online viscometer, and the polysilicic acid microgel was prepared.

[0011] Raw water is made of kaolin to produce turbid water with a turbidity of 80-100 NTU, a pH of 7.2, and a water temperature of 14°C. Add sewage into milk of lime, adjust the pH value at 8.5, then add the liquid obtained by mixing sodium silicate and sulfuric acid through a high-speed mixer, and add sewage at...

Embodiment 2

[0017] The modified polysilicate microgel flocculant is prepared by the following method:

[0018] Under high-speed stirring conditions, add 400kg of sodium silicate with a silicon dioxide concentration of 4 wt%, add 150ppm of silicon dioxide powder, stir vigorously in a drum stirring device, keep the Reynolds number of the liquid during the stirring process to be 12000, and then Acidify the solution with 20 wt% dilute sulfuric acid until the pH of the solution is 9, and measure the instant viscosity of the mixed solution with an online viscometer to be 22 mPa·S, that is, prepare a polysilicic acid microgel.

[0019] Add sewage to milk of lime, adjust the pH value at 8.0, then add the liquid obtained by mixing sodium silicate and sulfuric acid through a high-speed mixer, and add sewage at a ratio of 0.01wt%, keep the instant viscosity of the mixed solution less than 50mPa·S, and maintain the pH After about 2 minutes at 8.0, the pH was lowered to 7.5 by bubbling air or carbon d...

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Abstract

The purpose of the present invention is to provide a method for treating sewage in urban waters and sewage treatment plants, which belongs to the technical field of sewage treatment technology. This technology is to add sewage into milk of lime, adjust the pH value at 8.0-8.5, and then add the liquid obtained by mixing sodium silicate and sulfuric acid through a high-speed agitator. Less than 50mPa·S, keep the pH value at 8.0-8.5 for about 2 minutes, blow in air or carbon dioxide to reduce the pH value to 7.5-7.8, put the sewage into the sedimentation tank or air flotation tank to separate water and mud juice, and the mud juice is filtered Cloth or vacuum suction filter filter. This method adopts aggregates with various functional groups to flocculate and aggregate various pollutants, and is suitable for the treatment of various wastewater qualities. any environmental pollution.

Description

technical field [0001] The invention relates to a method for treating sewage in urban water areas and sewage treatment plants, and belongs to the technical field of sewage treatment technology. Background technique [0002] Urban sewage treatment technology is the key to the efficient operation of urban sewage treatment facilities. For a long time, my country's sewage treatment technology has followed the route and treatment technology of European and American countries for nearly a hundred years. While absorbing and digesting foreign technology, it has also formed its own technology. Urban sewage treatment technology has made great progress, but The sewage treatment technology adopted in my country at this stage is still very backward compared with the technical level of foreign countries in the same period, and there are always shortcomings such as low efficiency, high energy consumption, high maintenance rate, and low degree of automation. It is also due to the deviation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F9/08C02F1/52
Inventor 郑春明孙晓红陈佩佩程相芝朵志福鲍守民
Owner TIANJIN POLYTECHNIC UNIV