Dye wastewater using PAC-GR gravity separation process? Dye wastewater using PAC-GR gravity separation process? Dyeing and printing industry is a high water consumption industry, the annual water consumption of nearly 100 million tons, and the resulting wastewater and pollutants is more complicated, and water quality changes, the water content of organic matter is relatively high and the color of water due to the color of the dye is relatively large , So it is more difficult to deal with. The impact of direct discharge on the water quality in nature is very large. Human exposure to polluted water will endanger the health of human beings. At the same time, the ecological damage is also very serious. Dye Wastewater Treatment Poly aluminum chloride by gravity separation method for water treatment principle. Gravity separation of waste water is the most common and basic method of wastewater treatment. It is the use of gravity to the suspended solids and water away. As the suspended solids in wastewater density and wastewater density are different, so the gravity is also different. With PACF, when the density of the suspension is greater than the density of the wastewater, it settles under gravity. When the suspended solids density is less than the density of the wastewater when the float. Substances that are emulsified or have a density similar to that of wastewater are difficult to settle or float naturally and often need to be combined with other methods to force them to settle or float. The use of a polymeric aluminum ferric chloride filter can form larger flocs that enclose colloidal particles and other impurities in the water, naturally sinking, and the wastewater quickly becomes clear. Dyeing plant wastewater in the chroma is relatively large, need to use together with the combination of aluminum ferric chloride decolorizing agent to be used together to be able to better handle the printing and dyeing wastewater. Printing and dyeing wastewater quality characteristics: large amount of wastewater generated, in general, reached the printing and dyeing production of water between 70% -90%; printing and dyeing wastewater high chroma, the composition is more complex, most of the organic components of water are aromatic hydrocarbons and heterocyclic compounds, and Containing various kinds of halogenated substances, aniline, phenols and various additives; the quality of printing and dyeing wastewater will vary according to raw materials, processes, additives and products of different production types; wastewater discharge is intermittent; COD is high , BOD is relatively low, biodegradability is relatively poor. For printing and dyeing wastewater treatment process a lot, coagulation is one of the PAC as a new type of water treatment coagulant will be able to play the best treatment. Poly aluminum chloride form floc large flocculation speed for high COD water quality has a very good effect. This information is filtered source Technical Department finishing release, for transfer, please indicate the way, more PAC Ferrous Information please visit http://www.gyzhenyu.com view!