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Before we introduce the basic characteristics of the wastewater and harm, as everybody knows, printing and dyeing industry wastewater is given priority to with organic pollution, the composition is complicated, and it can be less biological sex is generally, the main processing method is given priority to with biological treatment, and some pretreatment and the depth of the physical and chemical processing. Today we mainly talk about several methods of governance, the use of stainless steel filter, to help us purify polluted water.
Waste chromium liquid treatment: in the printing process of the printing and dyeing factory, the printing drum plating cylinder to use potassium dichromate and other substances, chromium stripping cylinder will produce chromium pollution, these chromium containing wastewater must be treated separately to control the pollution of chromium. Neutralization: Printing and dyeing wastewater has a high pH value. In addition to using the regulating pool for homogenization, it is generally necessary to set up a neutralization pool, mainly treating the pH value of the wastewater, so that it can meet the needs of the subsequent production process. Regulation: printing and dyeing wastewater treatment process is usually set up a regulation pool, its role is to equalize the water quality and quantity, to prevent fiber chips, slurry materials and other precipitation at the bottom of the pool, the pool generally uses hydraulic, air or mechanical equipment to stir, the residence time of hydraulic is about 7 hours. Dye thick foot water pretreatment: when dyeing for varieties, the amount of dye wastewater discharged is small, but the concentration is very high. To treat this part of wastewater separately, the concentration of wastewater can be reduced.