Domestic sewage treatment technology and system

A domestic sewage and treatment system technology, applied in the direction of water/sewage multi-stage treatment, light water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of poor treatment efficiency, failure to meet discharge standards, domestic sewage To deal with problems such as complicated process, to achieve the effect of improving oxidation performance, reducing organic matter and improving water quality

Active Publication Date: 2015-11-25
SUNRUI MARINE ENVIRONMENT ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a domestic sewage treatment technology and system, which solves the problems in the prior art that the domestic sewage treatment process is complex, the treatment efficiency is poor, and the discharge standard cannot be met.

Method used

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  • Domestic sewage treatment technology and system

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Experimental program
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Effect test

Embodiment 1

[0022] In the domestic sewage treatment technology of the present invention, the first kind of ship domestic sewage is taken to measure its BOD 5 , TSS, heat-resistant Escherichia coli, COD, pH value, residual chlorine, total phosphorus and total nitrogen eight indicators, using seawater as a salinity regulator to adjust the salinity of the sewage to pretreat the sewage, the volume ratio of seawater to sewage is 1:3, after pretreatment, domestic sewage with a salinity of 8PSU is obtained; then, the above sewage is subjected to electrocoagulation treatment, and the current density of electrocoagulation is 10mA / cm 2 , the electrocoagulation time is 10min, and the supernatant and solid precipitate are obtained; then, the above supernatant is electrolyzed, and the electrolytic current density is 29mA / cm 2 , the electrolysis time is 5s, and the sewage containing the oxidizing agent is obtained; finally, air is introduced into the sewage containing the oxidizing agent, so that the a...

Embodiment 2

[0030] The domestic sewage treatment technology of the present invention takes the second kind of ship domestic sewage and measures its BOD 5, TSS, heat-resistant Escherichia coli, COD, pH value, residual chlorine, total phosphorus and total nitrogen. The pretreatment of sewage is completed, the volume ratio of sodium chloride solution and sewage is 1:2, and domestic sewage with a salinity of 15PSU is obtained after pretreatment; then, the above sewage is subjected to electrocoagulation treatment, and the current density of electrocoagulation is 15mA / cm 2 , the electrocoagulation time is 12min, and the supernatant and solid precipitates are obtained; then, the above supernatant is electrolyzed, and the electrolytic current density is 25mA / cm 2 , the electrolysis time is 10s, and the sewage containing oxidant is obtained; finally, oxygen is passed into the sewage containing oxidant, so that the oxygen pressure is 4bar, and then, it is irradiated by ultraviolet lamp, and the r...

Embodiment 3

[0038] The domestic sewage treatment technology of the present invention takes the third kind of ship domestic sewage and measures its BOD 5 , TSS, heat-resistant Escherichia coli, COD, pH value, residual chlorine, total phosphorus and total nitrogen eight indicators, first use the salinity regulator to adjust the salinity of the sewage, and complete the pretreatment of the sewage. After the pretreatment, the salinity is 25PSU of domestic sewage; then, electrocoagulation treatment is carried out on the above sewage, and the current density of electrocoagulation is 20mA / cm 2 , the electrocoagulation time is 15min, and the supernatant and solid precipitates are obtained; then, the above supernatant is electrolyzed, and the electrolytic current density is 20mA / cm 2 , the electrolysis time is 15s, and the sewage containing oxidant is obtained; finally, gas is introduced into the sewage containing oxidant, so that the gas pressure is 5bar, and then it is irradiated by ultraviolet l...

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Abstract

The invention provides a domestic sewage treatment technology and system, and relates to the field of domestic sewage treatment technologies. The domestic sewage treatment technology comprises the following steps that 1, salinity regulation is performed on domestic sewage; 2, electric flocculation treatment is performed on the domestic sewage to obtain supernatant liquid and solid sediment; 3, electrolysis treatment is performed on the supernatant liquid to obtain sewage containing oxidizing agents; 4, deep treatment is performed, wherein gas is introduced into the sewage containing the oxidizing agents, the gas pressure is 3-5 bar, irradiation is performed with an ultraviolet lamp, the irradiation intensity of the ultraviolet lamp is 20-150 mJ / cm<2>, and the irradiation time is 1-8 min. The invention further provides the treatment system for implementing the technology. According to the domestic sewage treatment technology and system, electric flocculation treatment, electrolysis treatment, chlorine removal and organic matter deep treatment are organically combined, high deepening treatment is performed on the domestic sewage, impurities in the sewage are greatly reduced, and the content of organic matter is especially reduced; the process is simple, operation is convenient, and the treatment efficiency is high.

Description

technical field [0001] The invention relates to the field of domestic sewage treatment technology, in particular to a domestic sewage treatment technology and a treatment system used therein. Background technique [0002] With the continuous development of science and technology and information, urbanization has also been continuously promoted, and the discharge of domestic sewage has increased year by year, resulting in increasingly serious water environmental pollution. Domestic sewage pollutants are mainly organic matter, such as starch, fat, protein, cellulose, sugar, mineral oil, etc., resulting in COD (chemical oxygen demand) and BOD in water. 5 (Biological Oxygen Demand) value is relatively high, and the untreated or substandard discharge of these water bodies will cause great pollution to the environment. [0003] At present, domestic and foreign domestic sewage treatment technologies are mainly biochemical methods (activated sludge method, MBR method) and electroch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/32
Inventor 于青范昊丁慧刘光洲王洪仁
Owner SUNRUI MARINE ENVIRONMENT ENG
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