Enforcement of Isolated Stain on Spentwash Medium Containing Yeast Sludge in Place of Urea and Phosphate

Abstract

It was evident in the earlier experiments that urea and phosphate are needed as nutrients in spentwash medium for good growth and COD reduction. On a plant scale, due to huge volumes of the effluent, it will not be economical to add these nutrients in the required quantities.

Yeast sludge was obtained from a distillery, autoclaved and kept in the cold. The analysis of yeast sludge showed that it had the following gross composition i.e. wet weight 9.6 percent, dry weight 4.18 percent, ash content 0.125 percent, nitrogen 0.125 percent, phosphate as PO4 0.037 percent and COD of 60,000 mg/l. 0.1 percent yeast sludge (V/V) was added into the spentwash medium in place of urea and phosphate.