Micro-electrolysis technology for industrial wastewater treatment |
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Authors: | Jin Yi-Zhong Zhang Yue-Feng Li Wei |
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Affiliation: | Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China |
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Abstract: | 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. |
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Keywords: | micro-electrolysis pharmaceutical wastewater dye-printing wastewater papermaking wastewater COD removal chromaticity removal |
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