Abstract

 
 
 In this study, the authors mostly deal with the issues of handing out different kinds of sewage created by tanneries productions with particular emphasis to chrome tanned sewage,H2S/NH3 emission handling and water conservation at cooling tower. The agents that creates this waste as a potentially harmful is hexa and trivalent chromium, black killer gas (H2S) and wastage of water blow- down at cooling tower, the authors show the hazards of unexpected all above three issues and in this contribution, a new retrofit methods of handling tannery waste water, contamination air emission. Tannery dirty water includes a great quantity of chemical mixture containing materials so the efforts were made to categorize physiochemical factor of tannery dirty water and biological treatment.
 
 
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