电镀废水处理工艺（Electroplating wastewater treatment process）.docVIP

电镀废水处理工艺（Electroplating wastewater treatment process） I. Preface Electroplating industry is an indispensable part of the national economy, involving national defense, industry and living fields. From the big categories are divided into parts, metal plating, plastic plating, to achieve corrosion protection, beautiful appearance, prolong life, appearance and decoration effect. The waste water produced by electroplating is harmful to the soil, plants and animals. So we must strictly deal with wastewater discharge standards, wastewater recycling implementation of water shortage area, from the production perspective, due to a variety of chemical plating production process and wastewater treatment process must be adding a certain amount of. Electroplating wastewater can be recycled and reused, and the reused water must be desalted to be reused for production line water. The total amount of salt in the environment will not be reduced, and the concentration of the resin exchange and reverse osmosis process will return to the ground. Two 、 electroplating wastewater treatment process The design of wastewater treatment process is based on the characteristics of wastewater, components and the situation of enterprises and the discharge of water quality parameters after treatment, and has been determined after comprehensive technical and economic comparison. Electroplating wastewater treatment process many: 1970s popular resin exchange, 80s electrolytic method, chemical method + air flotation, etc.. According to the practice of electroplating wastewater treatment in our factory in the past 20 years, it is concluded that resin exchange has advantages over the treatment of wastewater containing dilute metal ions and recovery of precious metals. Electrolytic method: high energy consumption, power consumption and iron consumption are high, the high concentration of chromium wastewater generated too much sludge and can not adapt to, while the treatment of cyanide containing wastewater