Immersed ultrafiltration process for automobile factory common sewage treatment
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A technology of sewage treatment and ultrafiltration process, applied in water/sewage treatment, biological water/sewage treatment, flotation water/sewage treatment, etc. The effect of large quantities, increasing volume
Inactive Publication Date: 2020-04-10
江苏特立智能装备科技有限公司
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[0005] Aiming at the deficiencies of the prior art, the present invention provides an immersion ultrafiltration process for the sewage treatment commonly used in automobile factories, which solves the problems of insufficient sewage treatment precision and non-compliance after sewage treatment
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[0037] Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0038] The invention provides a technical solution: an immersion ultrafiltration process for sewage treatment commonly used in automobile factories. The sewage treatment process includes degreasing treatment, oxidation decomposition treatment, electrophoresis treatment, coagulation reaction, coagulation precipitation, coagulation Flotation, physical filtration, biofilm ultrafiltration, detection, sludge treatment, the specific operations are as follows:
[0039] Step 1: Degreasing
[0040] The waste liquid is subjected to demulsification pretreatment by acidification method, adding inorganic acid to the waste liquid to adjust the pH to 2-3, and the higher fatty acid soap in the emulsifier precipitates fatty acids. These higher fatty acids are insoluble in water...
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Abstract
The invention discloses an immersed ultrafiltration process for automobile factory common sewage treatment. The immersed ultrafiltration process comprises degreasing treatment, oxygenolysis treatment,electrophoresis treatment, coagulation reaction, coagulation precipitation, coagulation air floatation, physical filtration, biofilm ultrafiltration, detection and sludge treatment. According to theinvention, by adding the biofilm ultrafiltration system after the traditional first-stage precipitation treatment and the second-stage precipitation treatment, sewage filtered by the traditional filtering mode is further filtered so as to improve the precipitation filtering effect in the sewage and reduce the COD index of the sewage, so that the standard reaching rate of sewage treatment is improved; and the ultrafiltration membrane used by the biofilm ultrafiltration can be repeatedly used through backwashing so as to reduce the sewage treatment cost.
Description
technical field [0001] The invention relates to the field of automobile sewage treatment, in particular to an immersion ultrafiltration process for the treatment of sewage commonly used in automobile factories. Background technique [0002] There are many types of wastewater in automobile factories, such as wastewater discharged from automobile surface coating, wastewater discharged from automobile cleaning, etc. Wastewater discharged from automobile painting lines mainly includes emulsification left by processes such as degreasing, phosphating, and surface adjustment during surface treatment before painting Oils, surfactants, phosphates, heavy metal ions (such as Zn2+), fillers (such as titanium dioxide) and solvents, as well as resins for spraying (such as epoxy resins, phenolic resins, etc.), pigments (such as carbon black, iron oxide Red, lead mercury, etc.), fillers (such as titanium dioxide, talc, etc.), cosolvents (such as triethanolamine, butanol, etc.) and a small a...
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