Organic waste water treatment system for water-based topcoat application technology of equipment coating and method thereof

Abstract

The invention discloses an organic waste water treatment system for water-based topcoat application technology of equipment coating. The invention is characterized in that the system comprises a photocatalytic reaction system and a biochemical treatment system; the photocatalytic system is used for treating organic waste water generated in the water-based topcoat coating technology of equipment; and the biochemical treatment system is used for treating organic waste water treated by the photocatalytic system. By the organic waste water treatment system for water-based topcoat coating technology of equipment, organic waste water firstly undergoes photocatalytic treatment such that macromolecular organic matter which is difficult to biodegrade is changed into small biodegradable molecular substances; and then, waste water treated after the photocatalytic treatment undergoes biochemical degradation to achieve the purpose of treating organic waste water. The invention also discloses a method for treating organic waste water in a water-based topcoat application process for equipment coating. After waste water is treated by the treatment method in the invention, pollutant indexes of organic waste water are reduced to the industrial water quality standard for municipal sewage recycling.

Description

technical field [0001] The invention relates to a waste treatment method and system, in particular to a treatment system and method for organic waste water in equipment coating water-based topcoat process. Background technique [0002] A large amount of organic wastewater will be generated during the coating process of equipment using water-based topcoats. For example, the organic wastewater from automotive water-based topcoat coatings mainly contains high-molecular organic resin mixtures, volatile and non-volatile mixed organic solvents (of which low volatilization rate Alcohol and ether solvents), special additives, various co-solvents, various pigments and fillers solids and other mixed pollutants, organic substances include but not limited to the following components: water-soluble acrylic resin, 2-butoxyethanol, Diethylene glycol monobutyl ether, petroleum spirit, polypropylene glycol, tetramethyldecanediol, 2-propanol, 1-methyl-2-pyrrolidone, n-butanol, 5-chloro-2-meth...

AI Technical Summary

Problems solved by technology

Although the biological aerated filter technology itself is easier to control the water temperature, it is often used as the post-stage process of the anaerobic biological filter in the actual design and construction of sewage treatment. Like the anaerobic process without water temperature control, the biological filter The water temperature is also difficult to meet the requirements

[0014] Anaerobic biological filter technology first needs a large-scale floor area, and has no degradation function for volatile waste gas in organic wastewater, resulting in unorganized emissions and easy to generate odor

For an open anaerobic biological filter, heating in autumn and winter will become a burden, and continuous operation without heating is equivalent to temporarily storing organic wastewater in sludge without degradation. When the temperature rises, the sludge will Sudden abnormality makes it difficult to operate stably, and may produce dangerous sludge waste, causing secondary organic wastewater pollution

Images