A treatment process for comprehensive wastewater generated from engine manufacturing

Abstract

The invention discloses a treatment technology of comprehensive wastewater produced by engine manufacturing. The treatment process comprises three sections: 1) a preliminary oil removal section: comprehensive wastewater produced by engine manufacturing is sent into a water reservoir, and after the water quality is adjusted, tiny oil slick and most suspended matters are separated out by the aid of simple gravity by use of an oil remover and a tubular remover; 2) a membrane filtration section: the wastewater enters a membrane filtration system after being filtered by a bag filter and filtered under certain pressure with a tubular ultrafiltration membrane used as a filtration medium; 3) integrated A / O (anaerobic / oxic) treatment section: a membrane penetration liquid and factory domestic wastewater are mixed to enter an integrated A / O biochemical treatment system for treatment. Compared with the prior art, the technology has the advantages that the cost of agents for sludge disposal is reduced, the treated comprehensive wastewater can be treated with domestic wastewater, besides, the whole technological structure is compact, and the technological process is short.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a treatment process for comprehensive waste water produced by engine manufacturing. Background technique [0002] With the continuous development of the automobile industry, the total amount of wastewater generated in the manufacturing process is increasing, and there are many types of wastewater. The comprehensive wastewater generated by automobile engine manufacturing mainly comes from: parts cleaning fluid; cutting fluid; cleaning waste fluid left in the assembly process; wastewater in painting; The pollutant content in the liquid is the highest, mainly high-concentration emulsion. The comprehensive wastewater contains citric acid, isopropanolamine, mineral oil, non-ionic surfactant, sodium carbonate, sodium sulfate, organic additives, emulsion and suspended solids, etc. Substance, complex chemical composition, high organic content, high oil content, serious p...

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Problems solved by technology

In addition, there are still problems in the existing process, such as large consumption of chemicals, high operating costs, complex multi-stage treatment process, unstable effluent quality, etc., which cause a certain burden on enterprise treatment and government supervision.

[0007] Therefore, the treatment of comprehensive wastewater from automobile engine manufacturing containing high-concentration emulsions and refractory organic pollutants such as mineral oil and non-ionic surfactants is very complicated. How to treat comprehensive wastewater from automobile engine manufacturing in an efficient, low-cost, and environmentally friendly manner It is a difficult point at present, and it is also a practical engineering problem that is of great research and application value and urgently needs to be solved.

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