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Treating method for industrial sewage containing roily oil

A technology of industrial sewage and treatment methods, which is applied in the direction of flotation water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., and can solve the problems of high energy consumption, large investment, and high energy consumption in operation , to achieve the effect of low operating cost, less investment and less land occupation

Inactive Publication Date: 2009-07-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Large investment and high energy consumption
The ceramic membrane filtration device is expensive and consumes a lot of energy in operation, and its power consumption per ton of water treatment is as high as about 15 degrees
[0006] (2) The investment membrane is easily blocked by oil, and it is difficult to clean and has a short service life
[0007] (3) The water filtered by the ceramic membrane still contains a high concentration of COD, and aerobic biological treatment alone cannot make the treated water reach the first-class standard stipulated in GB8978-1996

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method of the invention is used to treat the emulsified oily sewage discharged from the cold rolling section of a steel factory.

[0023] 1. The emulsified oil-containing sewage discharged from the cold rolling section of a steel plant is introduced into the regulating tank, and a drum degreaser is installed in the regulating tank; the average concentration of organic matter in the incoming water is 15000 (variation range 10000-20000) mg / LCODcr, the average of oil The concentration is 8000 (variation range 5000-12000) mg / L. After being treated by the drum degreaser, the average concentration of organic matter in the effluent water of the regulating tank is 6000 (variation range 5000-8000) mg / LCODcr, and the average concentration of oil is 1000 (800-1500) mg / L.

[0024] 2. Introduce the effluent from the removal of oil slick into the coagulation reaction device for coagulation treatment, and add 500mg / L demulsifier in the coagulation reaction device to cause the emul...

Embodiment 2

[0029] The method of the invention is used to treat emulsified oily sewage discharged from a certain automobile engine.

[0030] 1. Introduce the emulsified oil-containing sewage discharged from an automobile engine into the regulating tank, and install a drum degreaser in the regulating tank; the average concentration of organic matter in the incoming water is 20000 (variation range 16000-21000) mg / LCODcr, and the average concentration of oil is 6000 (change range 4000-9000) mg / L, after being treated by the drum degreaser, the average concentration of organic matter in the effluent water of the regulating tank is 12000 (change range 7000-15000) mg / LCODcr, and the average concentration of oil is 2000 (1500- 2500) mg / L.

[0031] 2. Introduce the effluent from which the slick oil has been removed into the coagulation reaction device for coagulation treatment, and add 800mg / L demulsifier to the coagulation reaction device to cause the emulsified oil in the water to undergo a demu...

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PUM

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Abstract

The invention relates to a method for treating industrial sewage containing emulsified oil, which belongs to the technical field of industrial sewage treatment. The method comprises the following steps: treating the industrial sewage containing the emulsified oil flowing into an adjusting tank by a revolving drum oil eliminator first, then performing coagulation treatment and air floatation treatment on the water eliminated with oil slick so as to break the emulsified oil and separate the oil from the water, and performing anaerobic treatment and aerobic treatment on the sewage to further reduce the concentration of organic substances in the water so that the treated water reaches a first level standard stated in GB8978-1996. The method has the advantages of simple treatment process flow, small construction investment, small occupied space for facilities, simple and convenient maintenance and management and stable treatment effect, and can make the water quality after the treatment reach the first level standard stated in the GB8978-1996.

Description

technical field [0001] The invention relates to a treatment method for emulsified oil-containing industrial sewage, in particular to a treatment method for high-concentration emulsified oil-containing sewage in steel mills and machinery manufacturing plants, and belongs to the technical field of industrial sewage treatment. Background technique [0002] Machinery manufacturing plants and steel mills cold-roll emulsified oil-containing wastewater contain a large amount of emulsified oil, etc., and the amount of sewage discharge varies greatly, as does the water quality. Usually the COD (chemical oxygen demand) concentration is as high as tens of thousands, and the emulsified oily sewage has good chemical stability, difficult treatment and extremely serious pollution. [0003] The existing method of treating this type of sewage adopts the "ceramic membrane ultrafiltration + aerobic combined treatment process", which is characterized in that the temperature of the sewage is kep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/40C02F1/52C02F1/24C02F3/30C02F103/16
Inventor 张振家
Owner SHANGHAI JIAO TONG UNIV
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