文章基本信息

标题：Optimization of the method wastewater treatment of unit bovine hides’s unhairing liming
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作者：Omor A. ; Rais Z. ; El Rhazi K. 等
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2017
卷号：8
期号：4
页码：1235-1246
出版社：University of Mohammed Premier Oujda
摘要：The mean object of this work is to evaluate the pollution degree of the various operating units (capacity of 2.5 tons of cattle/day) of tanning hide treatment, and treat effluents of the unit unhairing-liming by precipitation. The physico-chemical and biological characterization of wastewater studied operating units and the final discharge shows that the waters of all units are slightly basic, with a low biodegradable organic load and absence of fecal bacteria, but with a low concentration of flora mesophilic aerobic total. Settling of all characterized wastewater for one hour allowed a polluting load reduction of 10 to 35% with the exception of sulfide ions and electrical conductivity of the effluent have not changed almost their concentrations. The treatment of settled effluents, characterized by high load sulfide ions, of unhairing-liming unit by ferric chloride in basic medium has contributed to the elimination of approximately 90% of these ions as a precipitate.
关键词：Tannery sulphide toxicity; organic load; characterization; chemical treatment