Water paint production wastewater retreatment method

A technology for water-based paint and production wastewater, which is applied in waste paint treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Effect

Inactive Publication Date: 2012-08-15
JIANGSU CEZANNE LOW CARBON TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The invention provides a water-based paint production wastewater reprocessing method, which overcomes the above-mentioned deficiencies in the prior art, and can solve the difficult problem of water-based paint wastewater treatment

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Embodiment Construction

[0008] Such as figure 1 As shown, a water-based paint production wastewater reprocessing method, the first step: add sewage into the sewage sedimentation tank, then add polyaluminum chloride with a sewage weight of 0.1-0.3‰, turn on the air pump and blow and stir for 20 to 40 minutes The second step: After the floating particles in the sewage are stable, slowly add a polyacrylamide solution with a weight of 0.25-0.75% of the sewage weight and a concentration of 0.5-1.5‰, so that the floating particles in the sewage are fully flocculated and the water is clear and transparent; Step 3: After 12 hours of static storage, filter the supernatant in the sewage through an activated carbon filter, collect the water after primary filtration in a PP storage tank, and perform fine filtration through a RO reverse osmosis membrane pure water system; the fourth step : The demineralized water after fine filtration is sterilized by ozone for 10 minutes and then used as water-based paint produc...

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Abstract

The invention relates to the technical field of water paint wastewater treatment, in particular to a water paint production wastewater retreatment method. The method includes: step one, adding wastewater into a wastewater settling tank, adding polyaluminium chloride which is 0.1-0.3%. of the wastewater in weight, and starting an air pump for blowing and mixing for 20-40 minutes; and step two, after floating particulate matters in the wastewater are stable, slowly adding polyacrylamide solution with the weight being 0.25-0.75% of that of the wastewater and the concentration being 0.5-1.5%. to enable the floating particulate matters in the wastewater to be completely flocculated and the water to be clear. The wastewater is subjected to chemical flocculating settling, mechanical filtering and disinfection and then reused for production after water quality is qualified, the separated sludge can be subjected to drying and grinding and then used for production of construction putty powder, and accordingly 'zero emission' in production of water paint is realized, loss of raw materials and additives is reduced while discharge of wastewater and waste residue is avoided, and sewage-free, harmless and environment-friendly production process is realized.

Description

technical field [0001] The invention relates to the technical field of water-based paint wastewater treatment, and relates to a method for reprocessing water-based paint production wastewater. Background technique [0002] The traditional water-based paint production process has a large amount of wastewater, which is generally treated by end-of-pipe treatment methods, which not only pollutes the environment and destroys the ecology, but also wastes a lot of resources, seriously restricting the development of my country's economy and society. Contents of the invention [0003] The invention provides a water-based paint production wastewater reprocessing method, which overcomes the above-mentioned deficiencies in the prior art, and can solve the difficult problem of water-based paint wastewater treatment. [0004] The technical solution of the present invention is realized in the following way: a method for reprocessing wastewater from water-based paint production, the first...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/14
Inventor 朱豪
Owner JIANGSU CEZANNE LOW CARBON TECH
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