Microbial Kinetics and Growth Study in Biological Digestion of Composite Tan Liquor

Abstract

In the present paper, description of anaerobic treatment of tannery wastewater, according to the proposed kinetic model, has been presented. The experimental results of microbial growth predictions showed the greatest resemblance to the conventional models. The study on cell growth kinetics, substrate uptake and product formation in microbial growth, and enzyme kinetics has been carried out. The studies showed that an optimum BOD influent load of 0.8 kg BOD/m $^3$ /day with three days retention time could be adopted to yield about 97 percent BOD reduction. The bio-kinetic coefficients were evaluated using modified Monod's equations to study the metabolic performance of the digestion process. The role of magnesium carbonate during anaerobic digestion has been studied for the enhancement of methane generation.