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HTC force describes how treatment of dyeing wastewater | Jiaozuo

HTC bio-chemical forces to introduce you to how to handle the printing and dyeing industry wastewater
Printing and dyeing industry water consumption, usually every 1t textile dyeing and processing of water 100 a 200t. Of which 80% to 90% of dyeing wastewater discharge. Commonly used treatment methods for recycling and safe disposal.
Recycling: (1) water quality characteristics can be recycled separately, such as bleach scouring wastewater and dyeing and printing wastewater diversion, the former can be washed convection. A water use and reduce emissions; (2) alkali recycling, usually recovered by evaporation, such as lye large, three-effect evaporation recovery available, a small amount of lye used thin film evaporation recovery; (3) dye recovery. Shihlin dyes such as acidification become implicit Pakistani acid, was colloidal particles. The residue was suspended in, the precipitate was filtered off after recycling.
Sound processing can be divided into: (1) physical treatment precipitation and adsorption method. Precipitation mainly to remove suspended solids in wastewater; adsorption method is to remove the dissolved contaminants in wastewater and bleaching. (2) chemical treatment method has neutralization, coagulation and oxidation method. Neutralization method is to adjust the pH of the wastewater, wastewater can reduce chroma; coagulation method is to remove and disperse wastewater colloidal substances; oxidation that oxidation reducing substances in wastewater that precipitated sulfur and vat dyes. (3) has activated sludge biological treatment, rotating biological contactors, biological drum and biological contact oxidation method. In order to improve water quality, to meet emission standards or recycling requirements. Often requires the use of several methods combined treatment.
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