Remediation method of polluted water body of rivers and lakes

A repair method and sewage technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of low treatment rate of domestic sewage, increased pollution of rivers and lakes, and backward production technology And other issues

Inactive Publication Date: 2011-10-26
杨国录
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Problems solved by technology

Many enterprises have backward production technology, and have not implemented or only partially implemented the discharge standards that limit the discharge of sewage; some enterprises are driven by economic interests, and do not hesitate to sacrifice the water ecological environment for profits, which has increased the pollution of rivers and lakes; in addition, the treatment rate of domestic sewage Too low, many municipal sewage outlets directly into rivers and lakes

Method used

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  • Remediation method of polluted water body of rivers and lakes
  • Remediation method of polluted water body of rivers and lakes
  • Remediation method of polluted water body of rivers and lakes

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Embodiment Construction

[0013] The raw materials and dosage ratios used in Examples 1 to 3 for the restoration of sewage bodies in rivers and lakes are shown in Table 1. The components of flocculants and coagulants are coagulated according to the solid particles and colloidal particles in the sewage body. Weight ratio meter.

[0014] Table 1 Unit:%

[0015]

[0016] The method of repairing the sewage of rivers and lakes, the dosage of each substance is according to Table 1, and the following steps are carried out: (1) The first stage of coagulation treatment: Na 2 CO 3 And PAC press first Na 2 CO 3 , After PAC is added to the sewage body in order, and coagulated by aeration turbulent agitation; 15-30 seconds later, polyacrylamide and starch-acrylamide graft copolymer are added to the sewage -The acrylamide graft copolymer is sequentially added to the sewage body, and coagulation is carried out by aeration turbulent agitation; (2) The second stage of biochemical treatment: the sewage body after the first s...

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Abstract

The invention provides a remediation method of a polluted water body of rivers and lakes. The remediation method comprises two stages, including a coagulation treatment stage and a biochemical treatment stage. At the coagulation treatment stage, aeration turbulence coagulation treatment is carried out in an order of Na2CO3 treatment before PAC treatment and then carried out in an order of polyacrylamide treatment before a starch-acrylamide graft copolymer treatment after 15-20 s, and the weight of the added reagent is 0.01-0.05 percent by weight of solid particles and colloidal particles in the polluted water body. At the biochemical treatment stage, a solidified biofilm process is continuously used in the polluted water body to reduce COD, BOD, TN and TP in the water body. The microorganisms are solidified by adopting an embedding method: 10% PVA (Polyvinyl Acetate) by mass concentration is used as an embedding agent, and 0.2% sodium alginate by mass concentration is used as an additive to embed mud in a ratio of 1:1 for 28 h and adjust a pH value to 6.5 while the ball diameter is 5 mm, and bacteria comprise screened and domesticated nitrifying bacteria and phosphorus-collecting bacteria. The two treatment stages of the invention have different targets and are mutually complementary.

Description

Technical field [0001] The invention relates to a method for repairing sewage bodies in rivers and lakes. Background technique [0002] With the rapid development of my country's economy for more than 20 years, the scale and speed of development, utilization of river and lake resources have been greatly enhanced, affecting the natural evolution of rivers and lakes, and causing serious damage to the river and lake ecosystems. [0003] The deterioration of the water environment of rivers and lakes will seriously affect the social and economic development and the quality of human settlements in the surrounding areas of rivers and lakes. The pollution of rivers and lakes in my country mainly comes from farmland drainage, industrial wastewater and domestic sewage. Many enterprises have backward production technology and have not implemented or only partially implemented the discharge standards that restrict the discharge of sewage; some enterprises are driven by economic interests and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 杨国录
Owner 杨国录
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