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Municipal sewage treatment process

A technology of municipal sewage and treatment process, which is applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., and can solve problems such as the increase of sewage content and the effect of flocculant sewage treatment, etc. To achieve the effect of improving utilization rate, long-lasting decontamination effect and improving survival rate

Inactive Publication Date: 2020-06-26
广州华景建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: the structure of the sedimentation floc formed by the combination of the existing flocculant and the dirt in the water is relatively loose, so that the dirt adsorbed by the flocculant is easily separated from the sedimentation floc, and re- Returning to the sewage, causing the dirt content in the sewage to rise again, so that the sewage treatment effect of the flocculant is easily affected, so there is still room for improvement

Method used

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  • Municipal sewage treatment process
  • Municipal sewage treatment process
  • Municipal sewage treatment process

Examples

Experimental program
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Effect test

Embodiment 1

[0068] A municipal sewage treatment process, comprising the following steps:

[0069] Step (1), primary processing, is as follows:

[0070] Samples were taken from the municipal drainage ditch on No. 19, Jianshe Dama Road, Yuexiu District, Guangzhou City as test raw water. Take 10L of test raw water as a sample, and pass the test raw water sample through a filter with a mesh size of 200 meshes to filter out the test raw water sample. Garbage, stones and other large particles of insoluble impurities in the waste water can be pretreated sewage.

[0071] Step (2), secondary processing, is as follows:

[0072] Pass the pretreated sewage obtained in step (1) into the secondary sedimentation tank, let it stand for 40 minutes, and pump the supernatant into the tertiary treatment tank, so that the supernatant is separated from the suspension in the lower layer to obtain intermediate sewage.

[0073] Step (3), prepare flocculant, specifically as follows:

[0074] Add 75kg of polyacr...

Embodiment 2

[0080] The difference with embodiment 1 is:

[0081] The pretreated sewage in step (2) was left to stand for 50 minutes.

[0082] The consumption of each component that adds in the step (3) is as follows:

[0083] Polyacrylamide 70kg; coagulant aid 15kg; water 45kg; clay 17.5kg; formononetin 1kg; hydroxyethyl hexahydro-s-triazine 1.5kg.

[0084] In step (3), the temperature of the drying oven is controlled to 90° C., and the drying time is controlled to be 9 hours.

Embodiment 3

[0086] The difference with embodiment 1 is:

[0087] The pretreated sewage in step (2) was left to stand for 60 minutes.

[0088] The consumption of each component that adds in the step (3) is as follows:

[0089] Polyacrylamide 80kg; coagulant aid 17.5kg; water 30kg; clay 20kg; formononetin 3kg; hydroxyethylhexahydro-s-triazine 0.5kg.

[0090] In step (3), the temperature of the drying oven is controlled to 95° C., and the drying time is controlled to be 8 hours.

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Abstract

The invention relates to the technical field of sewage treatment, and concretely relates to a municipal sewage treatment process. The process comprises the following steps: (1) performing primary treatment: filtering; (2), performing secondary treatment: standing; (3) preparing a flocculating agent; (4) performing tertiary treatment: putting the flocculating agent prepared in step (3) into intermediate sewage separated in step (2), stirring, separating out a supernatant after settling flocs formed by the flocculating agent and dirt in the intermediate sewage are completely settled, and removing the settling flocs to obtain purified water so as to finish the treatment of the municipal sewage. The flocculating agent is prepared from, by mass, 70 to 80 parts of polyacrylamide, 15 to 20 partsof a coagulant aid, 30 to 45 parts of water, 5-10 parts of clay, 1 to 3 parts of formononetin and 0.5 to 1.5 parts of hexahydro-1,3,5-tris(hydroxyethyl)-s-triazine. The adsorbed dirt is not easily separated from the settling flocs, such that the sewage content in the treated purified water is not easily increased.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a municipal sewage treatment process. Background technique [0002] At present, with the acceleration of urbanization and industrialization, the production volume is continuously increasing, and the pollution is becoming more and more serious, which has seriously restricted the sustainable development of urban social economy. The pollution of municipal sewage has become increasingly prominent in the process of urbanization and industrialization, and it has also become a very important factor restricting the sustainable development of urban social economy. Therefore, the problem of proper disposal of municipal sewage is particularly important. [0003] The existing municipal sewage treatment process generally includes primary treatment, secondary treatment and tertiary treatment. The primary treatment is to filter solid waste in municipal sewage; the secondary treatment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/52C02F1/54C02F1/56C02F101/10C02F101/16
CPCC02F1/001C02F1/5236C02F1/5263C02F1/54C02F1/56C02F9/00C02F2001/007C02F2101/105C02F2101/16
Inventor 余丽莉李杰业成永辉冯华
Owner 广州华景建设有限公司