Electroplating Wastewater Concentration System Utilizing Mechanical Vapor Recompression
Publication: Journal of Environmental Engineering
Volume 144, Issue 7
Abstract
Electroplating wastewater must be properly treated before being discharged to the environment. A new type of evaporation system, called mechanical vapor recompression (MVR), was designed and studied in this paper. A series of experiments were performed to determine the evaporation and chemical characteristics of the wastewater. During MVR operation, the wastewater and treated water were sampled hourly at the monitoring points. The results showed that after the MVR evaporation, the chemical oxygen demand (COD) decreased from 5,450 to , the average Cu content decreased from 55 to , and the Ni and Zn contents decreased from 65 and to less than . In addition, the evaporation was approximately at an evaporative temperature of 90°C and increased with increasing compressor frequency; the variation in the compressor power followed the same trend as the variation in the evaporation capacity.
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Acknowledgments
This study was supported by the National Key Research and Development Program of China (No. 2016YFC1402506) and National Natural Science Foundation of China (No. 21606244).
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Published In
Journal of Environmental Engineering
Volume 144 • Issue 7 • July 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: May 11, 2017
Accepted: Dec 11, 2017
Published online: May 10, 2018
Published in print: Jul 1, 2018
Discussion open until: Oct 10, 2018
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