Method for treating paint waste water

A treatment method and wastewater technology, which is applied in flotation water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of high wastewater lifting costs and filter blockage

Inactive Publication Date: 2010-01-27
刘倩
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AI Technical Summary

Problems solved by technology

The tower biofilter is used for the pretreatment of high-concentration organic wastewater, and the BOD of the influent 5 When the concentration is high, because the biofilm grows too fast, it is easy to cause the clogging of the filter material, and because the pool is high, the lifting cost of the wastewater is relatively large

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  • Method for treating paint waste water

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Embodiment Construction

[0011] (1) The paint wastewater generated during the production process passes through the grid before entering the treatment system to intercept larger suspended and floating substances, so as to reduce the treatment load of subsequent treatment structures;

[0012] (2) After that, the wastewater enters the oil separation sedimentation tank to remove part of the slick oil and COD. The oil separation sedimentation tank adopts manual oil skimming to remove slag; the wastewater then enters the adjustment tank to adjust the water quality and quantity, and provide stable hydraulic load and organic load for subsequent treatment. , the residence time t of the wastewater in the regulating tank is 8 hours; the wastewater regulated by the regulating tank is pumped into the air flotation tank; in the air flotation tank, the paint wastewater is removed most of the oil by air flotation;

[0013] (3) The wastewater after air flotation treatment enters the biological contact oxidation tank t...

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Abstract

The invention discloses a method for treating paint waste water, which belongs to the technical field of waste water treatment, and particularly relates to the method for treating the paint waste water. The method for treating the paint waste water through oil isolation, coagulation air floatation and bio-contact oxidation has the advantages of low cost, small energy consumption, convenient operation management and good treatment effect. The method adopts the following technical scheme: (1) passing the paint waste water through a bar screen; (2) putting the waste water passing through the bar screen into an oil isolation sedimentation tank, and then in a regulating tank, and pumping the waste water regulated by the regulating tank into an air flotation tank by a pump; (3) putting the waste water after the air flotation treatment together with domestic sewage into a bio-contact oxidation tank to perform biochemical treatment, and performing mud-water separation on the waste water through an inclined plate sedimentation tank so that the waste water reaches the discharge standards; and (4) returning part of the sludge deposited in the inclined plate sedimentation tank to a primary bio-contact oxidation tank, putting the remaining sludge and the oil slick separated by the coagulation air floatation tank into a chemical sludge tank for concentration, and pumping the sludge after the concentration into a chamber press filter by a sludge pump to perform dewatering treatments.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, in particular to a method for treating paint wastewater. Background technique [0002] The production and application of paint have a long history. my country has just begun to use paint as early as thousands of years ago. The paint used at that time was processed into natural lacquer from the paint liquid taken from the lacquer tree. In modern times, due to the appearance of synthetic materials, a new source has been opened up for paint raw materials. When various synthetic materials—synthetic resins, pigments and organic solvents, etc.—are widely used to manufacture paints, new varieties with various properties are increasing with each passing day. This is the paint that people are familiar with now. [0003] The wastewater discharged during the coating production process often contains toxic and harmful substances such as phenols, benzenes and heavy metals (surface treatment). ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/40C02F1/24C02F3/08C02F1/52
Inventor 刘倩
Owner 刘倩
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