Sewage treatment process for printing and dyeing processing
A sewage treatment and sewage technology, applied in water/sewage treatment, textile industry wastewater treatment, biological water/sewage treatment, etc., can solve the problem that sewage cannot meet the environmental discharge standards, cannot meet environmental protection requirements, and has a single sewage treatment method, etc. problems, achieve the effect of realizing automatic processing, improving the degradation of organic matter, and prolonging the residence time
Inactive Publication Date: 2020-10-16
南通艾爽纺织有限公司
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Problems solved by technology
[0003] There are many existing domestic methods for treating printing and dyeing textile wastewater. The representative one is the traditional method of direct chemical treatment. This method has a low recycling rate, and the discharged treated wastewater still contains a large amount of harmful substances. , these sewage treatment methods are relatively single, and the treated sewage often does not meet the environmental discharge standards and cannot meet better environmental protection requirements, so it needs to be improved
Method used
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Experimental program
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Embodiment Construction
[0034] The following is a further detailed description of the application.
[0035] A kind of sewage treatment process that is used for printing and dyeing process disclosed in the application, it comprises the following steps:
[0036] S100, grid decontamination, transporting the sewage to the grid well, the grid in the grid well filters and removes large solid impurities and part of solid suspended matter in the sewage;
[0037] S101, the sewage enters the aeration area after passing through the grid well, and the aerator in the aeration area fully mixes the incoming sewage and the original mixed solution to adapt to the change of the influent water quality to the greatest extent. The water quality of each point in the area is relatively uniform, and the number and nature of microorganisms are basically the same. Therefore, the working conditions of each unsealed area in the aeration area are almost the same, which controls the entire biochemical reaction under a good same c...
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The invention relates to a sewage treatment process for printing and dyeing processing. The sewage treatment process comprises the following steps: S100, grating decontamination: filtering sewage to remove large solid impurities and part of suspended solids in sewage by a grating in a grating well; S200, water quality regulation: regulating the water quality and the water quantity of the sewage ina regulating tank, wherein the retention time of sewage in the regulating tank should be long; S300, coagulation: adding a coagulation agent into a coagulation tank, mechanically stirring by adoptinga mode that the hydraulic conditions can be easily adjusted, so as to guarantee sufficient reactions, and controlling the reaction time in a range of 25 minutes and 30 minutes; S400, hydrolytic acidification: carrying out hydrolytic oxidation on the sewage, and adding a filler for biofilm formation; S500, chemical oxidation: introducing the sewage into an oxidation tank, and introducing ozone into the sewage by utilizing an aeration device; and S600, deep treatment: further reducing the COD concentration of the sewage by utilizing microorganisms in a BAF tank under an aerobic condition. The sewage treatment process has the effects that the printing and dyeing wastewater treatment efficiency is improved, and the water quality after printing and dyeing wastewater treatment is improved so asto meet higher discharge requirements.
Description
technical field [0001] The present application relates to the technical field of printing and dyeing wastewater treatment, in particular to a wastewater treatment process for printing and dyeing processing. Background technique [0002] At present, the printing and dyeing industry is an industry that consumes a large amount of water in the textile industry. Water is used as a medium to participate in the entire dyeing and finishing process. The printing and dyeing sewage has a large amount of water, high chroma, and complex components. The sewage contains dyes, pastes, additives, oils, and acids. Alkali, fiber impurities and inorganic salts, etc., nitro and amine compounds and heavy metal elements such as copper, chromium, zinc and arsenic in the dye structure have high biological toxicity and seriously pollute the environment. Therefore, when dealing with the sewage generated by printing and dyeing, it is necessary The sewage shall be treated in time to ensure that the sewa...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C02F9/14C02F103/30
CPCC02F9/00C02F2103/30C02F1/001C02F1/5281C02F2001/007C02F3/2806C02F1/78C02F3/06C02F2209/08C02F2209/10C02F3/1268
Inventor 张芳芳
Owner 南通艾爽纺织有限公司