Abstract This study focused on effluents characterization and accessing physical and chemical treatment by filtration and coagulation processes. The analysis results of the raw effluents reveal that the effluents were yellowish-brown color, having basic pH, very high values of BOD 5 , COD, TDS, TSS, TS and high concentrations of Cr, Na, SO 4 2− and other organic and inorganic constituents. After settling and a subsequent filtration of raw tannery effluents through sand-stone, the filtered effluents were treated with various doses of FeCl 3 . The study observed that coagulant (FeCl 3 ) of 150 mg/L dose near neutral pH showed the best removal efficiencies for major physico-chemical parameters. The analysis results illustrate that most of the physical and chemical parameters were found well below the prescribed permissible limits for effluent discharged. The study suggests that untreated tannery effluents would be treated by a combined process consisting of settling, filtering and coagulating with FeCl 3 .
Treatment of leather industrial effluents by filtration and coagulation processes
Manjushree Chowdhury,M. Mostafa,T. Biswas,A. Saha
Published 2013 in Water Resources and Industry
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- Publication year
2013
- Venue
Water Resources and Industry
- Publication date
2013-09-01
- Fields of study
Materials Science, Chemistry, Environmental Science
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