What are the printing and dyeing industry wastewater treatment method?

Printing and dyeing wastewater treatment technology more coupling

printing and dyeing wastewater treatment with water, complex, high organic matter content, water quality and biological sex difference, alkalinity, high chromaticity, etc. Environmental science research institute of jiangsu province hai-suo wu according to the characteristics of the dyeing and printing wastewater and the treatment process is put forward, the research focus in the printing and dyeing wastewater treatment technology at present can be divided into the following four parts: the pretreatment stage by pH control, homogeneous average to reduce the impact load, biological toxicity; By anaerobic biological stage of processing facilities improve, aerobic microorganism raise to biological sex; Deep processing stages through adsorption separation, filtering, oxidation technology meet standards; Regeneration recycling processing phase coupling regeneration technology by membrane separation, purification and recycling. And points out the development trend of printing and dyeing wastewater treatment technology is efficient biological coupling, adsorption, separation technology, production process and waste water treatment of the coupling, high quality development and printing and dyeing wastewater reuse technology of desalting and regeneration.

the polluting industries of moderate sewage treatment and reuse is an important means of reducing investment and operation cost, so the choice of economic efficient pretreatment process optimization is the focus of the research in recent years, in the process of a new round of sewage treatment plant to standard transformation, deep processing standards process will be more widely used.

new industry printing and dyeing wastewater treatment methods

1. Essence of diatom earth new technology of dyeing and printing wastewater

diatomaceous soil treatment has a set of flocculation, adsorption and filtration function, CODCr of sewage, have strong ability to remove chromaticity. Diatom unbalanced potential able to neutralize the suspended particles on the surface of the charge, make its repel potential damage and form mash with diatom feather, forming a larger flocculant. , on the other hand, because of their huge specific surface area and surface adsorption and stable colloid can be adsorbed onto the diatomite, and attached to the each other between diatomite particles of pollutants in the adsorption capacity is big, can rapidly to form larger flocs, granularity and density flocculant physical form a stable dense suspended sludge filtration layer, suspended mud filter after make a further purification, wastewater after biochemical purification finally to achieve.

2。 'ozone oxidation BAF + air flotation + membrane separation' technology

according to the traditional ozone activated carbon process and dissolved air flotation process, contact inside the equipment will be fully mixed, raw water and ozone combined ozone activated water up through the unique packing layer, after contact oxidation, kill the activated sludge of team, and oxidation of ferrous iron ions, manganous ions to form hydroxide colloid, adsorption with each other, through two levels of whirl mix mixed condenser, using ultrafiltration membrane technology, water molecules and molecular weight smaller solute through the membrane, and the particles is greater than the film hole, large molecules, such as being trapped by screening, so as to achieve the purpose of the industry of printing and dyeing wastewater disposal.

in the production of 222 joint degreased cotton winding water filter effectively remove impurities of large amount of high filtration efficiency, etc