Biokinetic Studies in the Treatment of Tannery Effluent

N. B. Prakash


The present investigation deals with the anaerobic treatment of composite tan liquor with varying organic loads. BOD of the influent and effluent and MLSS of reactor were determined at various detention times to generate data for kinetic coefficients. The kinetic coefficients k (maximum substrate utilization rate), Ks (half velocity constant), Y (cell yield coefficient) and Kd (decay coefficient) were found to be 1.66 day-1, 1132 mg/L, 0.05 and 0.22 day-1, respectively. Overall BOD removal rate constant ‘K’ was found to be 1.46 day-1. The studies showed that an optimum BOD influent load of 0.8 Kg BOD/m3/day with 3 days retention time could be adopted to yield about 97 percent BOD reduc¬tion. The Bio-kinetic coefficients were evaluated using modified Monod’s equations to study the metabolic performance of the digestion process.

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