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Tannery waste water contains an enumerous amount of chemicals and a high level of pH, TDS, TSS, BOD, and COD, which gets directly into the natural aquatic environment, thus polluting to the water quality. Because of that important to develop a cost-effective and eco-friendly technology to treat the tannery waste water. Our present research work has been done to investigate the physical and chemical characteristics of tannery waste water and to decrease the value of BOD, pH, and COD by the procedure of bioremediation using microbes. Among the physical and chemical characteristics analyzed BOD, pH and COD were find to be very huge value. Pseudomonas aeruginosa and Bacillus cereus were identified and isolated and utilized in the decrease of BOD, pH, and COD in the tannery waste water. Four different concentrations of untreated tannery waste water (control, 25, 50, 75, and 100%) were prepared. The treatment was carried out for 48 hrs (2 days). It is inferred from the results that Bacillus cereus to be more effective in reducing pH, BOD, and COD than the bacterium, Pseudomonas aeruginosa in the untreated tannery effluents.
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