Agro industrial and food-processing substrates are considered as best cheap carbon source for enzyme production by SSF. The cost of enzyme production by submerged fermentation (SmF) is higher as compared to solid state fermentation (SSF). In this work we have used wheat bran, corn cob, and pigeon pea pods wastes for production of industrially important enzyme xylanase. It is important enzyme in paper and pulp and in food industry. The production of xylanase was investigated in SSF of Aspergillus niger. The parameters like pH, temperature, moisture content, incubation period, and nitrogen sources were optimized on wheat bran waste. The optimum condition for maximum biosynthesis of xylanase by A. niger (in term of xylose production) were shown to be at pH 6.0, temperature 40 0 C, moisture 1:2.5 (w/v), incubation period 4 days, and in peptone with yeast extract as nitrogen source. By using optimized conditions corn cobs waste and wheat bran wastes were found to be best carbon source for xylanase production followed by pigeon pea pod waste.
