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Method for treating sewage by combining electric flocculation and chemical flocculation

A technology of chemical flocculation and chemical flocculant, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, neutralization water/sewage treatment, etc., can solve problems such as living environment hazards and affecting human health, and achieve good results , good water quality

Inactive Publication Date: 2019-01-15
FOSHAN UNIVERSITY
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Problems solved by technology

Purifying water resources also plays a great role in protecting and improving the environment, because the substances discharged by some chemical factories will contain a lot of toxic substances or environmentally unfriendly substances. It poses great harm and seriously affects human health, so it is necessary to carry out sewage treatment

Method used

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  • Method for treating sewage by combining electric flocculation and chemical flocculation
  • Method for treating sewage by combining electric flocculation and chemical flocculation
  • Method for treating sewage by combining electric flocculation and chemical flocculation

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Embodiment Construction

[0013] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. The specific embodiments described here are only used to explain the present invention, not to limit the invention.

[0014] In order to verify that the method of the present invention is due to the effect of separate electrocoagulation and chemical flocculation treatment of sewage, the chemical flocculation test and the electrocoagulation test are carried out separately, and the use of the test sample sewage is that the waste emulsion of 1.86g / L is the waste emulsion of the experiment. The liquid has a pH value of 8.7, has a peculiar smell and the water body is gray-black.

[0015] 1) Chemical flocculation experiment: using the capacity measurement experiment method, the six chemical The flocculant was put into 6 identical containers, and each container contained 500ml of w...

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Abstract

The invention discloses a method for treating sewage by combining electric flocculation and chemical flocculation. The method comprises the steps that the pH value of the sewage is adjusted to be 6-8,1.5-4.2 g of a chemical flocculant is added into per liter of sewage, and treatment is carried out for 3-8 minutes; and the sewage subjected to chemical flocculation is added into an electrolytic cell, a positive plate and a negative plate are arranged in the electrolytic cell, the positive plate is connected with a positive pole of a voltage-stabilized direct-current power supply, the negative plate is connected with a negative pole of the voltage-stabilized direct-current power supply, the voltage-stabilized direct-current power supply is connected, and after the electrolytic cell is electrified for 40 minutes, conventional mechanical filtration is adopted to filter floccules and slurry so as to obtain purified water. Compared with the prior art, the method has the advantages that an electric flocculation technology and a chemical flocculation technology are combined, the sewage treatment effect is good compared with the sewage treatment effect through single electric flocculation and chemical flocculation, the treated purified water is good in water quality and is colorless and odorless, and the COD (chemical oxygen demand) can reach 600 mg / L or below.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for treating sewage by combining electric flocculation and chemical flocculation. Background technique [0002] With the development of domestic industry and the rapid development of the economy, the pressure on urban water use is increasing. There is no doubt that we must correctly realize that the social cycle of water has far exceeded the tolerable range of the natural cycle of water. Due to the rapid increase of the proportion of urban population, the industrial sewage and urban domestic sewage produced by industrial water are directly discharged without treatment, which seriously pollutes the water resources around the pollution source and has an extremely bad impact on people's living environment. Now the sewage Dealing with problems has become one of the most urgent problems in modern society! The continuous discharge of various industrial wastewater and...

Claims

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Application Information

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IPC IPC(8): C02F9/06
CPCC02F1/463C02F1/56C02F1/66C02F9/00C02F2209/08
Inventor 林洁丽冼聪
Owner FOSHAN UNIVERSITY
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