Document Detail


Treatment of refectory oily wastewater by electro-coagulation process.
MedLine Citation:
PMID:  15268954     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Electro-coagulation was used to treat refectory wastewater with high oil and grease contents. Different operational conditions were examined, including pH, current density, reaction time, conductivity, electrode distance and inlet concentration. The optimum current density was 10-14 A m(-2) within 30 min depending on the wastewater properties tested. Conductivity had little effect on the treatment efficiency. Although the addition of extra salts (e.g., sodium chloride) to the wastewater did not help increase the pollutant removal efficiency, it could save the power consumption significantly. The COD(Cr) and oil removal efficiency descended with increasing electrode distance. The optimal electrode distance was determined to be 10 mm for this equipment in consideration of the treatment cost and efficiency together. The pH effect on the performance of the electro-coagulation process was not very significant in the range of 3-10. The removal efficiency of oil and COD(Cr) under normal condition exceeded 95% and 75%, respectively.
Authors:
Xinhua Xu; Xiangfeng Zhu
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Chemosphere     Volume:  56     ISSN:  0045-6535     ISO Abbreviation:  Chemosphere     Publication Date:  2004 Sep 
Date Detail:
Created Date:  2004-07-22     Completed Date:  2004-11-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  889-94     Citation Subset:  IM    
Affiliation:
Department of Environmental Engineering, Zhejiang University, Academic Building 10, Yuquan Campus, Hangzhou 310027, People's Republic of China. xhxu@hzcnc.com
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MeSH Terms
Descriptor/Qualifier:
Electric Conductivity
Electrocoagulation / methods*
Electrodes
Hydrogen-Ion Concentration
Petroleum*
Time Factors
Waste Disposal, Fluid / methods*
Water Pollutants, Chemical*
Chemical
Reg. No./Substance:
0/Petroleum; 0/Water Pollutants, Chemical

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