期刊
CHEMOSPHERE
卷 72, 期 11, 页码 1727-1733出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2008.04.067
关键词
electrocoagulation; slaughterhouse wastewater; electrolytic cell; aluminium electrode; mild steel electrode; sludge
资金
- Canada Research Chairs
- National Sciences and Engineering Research Council of Canada
Slaughterhouse wastewaters contain varied and high amounts of organic matter (e.g., proteins, blood, fat). In order to produce an effluent suitable for stream discharge, electrochemical techniques have been particularly explored at the laboratory pilot scale for organic compounds removal from poultry slaughterhouse (PS) effluent. Electrocoagulation (EC) process was tested using either mild steel or aluminium electrodes arranged in bipolar (BP) or monopolar configuration system. Results showed that the best performance was obtained using mild steel BP electrode system operated at a current intensity of 0.3 A. through 60 or 90 min of treatment. Under these conditions. removals of 86 +/- 1% and 99 +/- 1% were measured for BOD and oil and grease, respectively, whereas soluble COD and total COD were removed by 50 +/- 4% and 82 +/- 2%, respectively. EC is also efficient for decolorization (red-color) and clarification of the PS effluent. Removals of 89 +/- 4% and 90 +/- 4% have been measured for total suspended solids and turbidity. respectively. Electrochemical coagulation operated under the optimal conditions involves a total cost of 0.71 USD $ per cubic meter of treated PS effluent. This cost includes energy and electrode consumptions, chemicals, and sludge disposal. (c) 2008 Elsevier Ltd. All rights reserved.
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