工艺特点 Technics Characteristic
The innocuous treatment can be divided into two methods:precipitation method and adsorption method.Precipitation method ismainly used to remove suspended matter from wastewater and adsorption method is mainly to remove dissolved pollutants anddecolorization in wastewater.The chemical treatment methods include neutralization method, coagulation method and oxidationmethod.The neutralization method is to adjust the acidity and alkalinity of the wastewater,but also to reduce the chroma of thewastewater.The coagulation method is to remove disperse dyes and colloids from the wastewater. The oxidation process is toreduce the substance in the oxidizing wastewater, so that the sulphide dye and the vat dye are precipitated. (3) the biologicaltreatment process includes activated sludge process, biological turntable process and biological contact oxidation process etc.In order to improve the effluent quality,the effluent can meet the discharge standard or Recovery requirements often need to betreated in combination with several methods
Printing wastewater contains PS plate development waste liquid, offset press cots cleaning wastewater, in addition to acid andalkal, high chroma, the amount of waste water fluctuate. The COD value of ordinary domestic wastewater is less than 800 mg/L, while. the COD value of printing wastewater is more than 20000mg/L.Treatment is more difficult.Common treatmentmethods have recycling and harmless treatment.