Micro-electrolysis technology for industrial wastewater treatment.
Experiments were conducted to study the role of micro-electrolysis in removing chromaticity and COD and improving the biodegradability of wastewater from pharmaceutical, dye-printing and papermaking plants. Results showed that the use of micro-electrolysis technology could remove more than 90% of chromaticity and more than 50% of COD and greatly improved the biodegradability of pharmaceutical wastewater. Lower initial pH could be advantageous to the removal of chromaticity. A retention time of 30 minutes was recommended for the process design of micro-electrolysis. For the use of micro-electrolysis in treatment of dye-printing wastewater, the removal rates of both chromaticity and COD were increased from neutral condition to acid condition for disperse blue wastewater; more than 90% of chromaticity and more than 50% of COD could be removed in neutral condition for vital red wastewater.
Jin
Yi-Zhong
YZ
Department of Environmental Engineering, Zhejiang University, Hangzhou, China. jyzjyy@mail.hz.zj.cn
Zhang
Yue-Feng
YF
Li
Wei
W
D001673:Biodegradation, Environmental; D004345:Drug Industry; D004572:Electrolysis; D007220:Industrial Waste; D010100:Oxygen / Q000737:chemistry; D010209:Paper; D013783:Textile Industry; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D010100:Oxygen