Cellulase Enzyme Activity of Bacillus Circulans from Larvae Cossus Cossus in Lignocellulosic Substrat

Abstract

Cellulase are the enzymes hydrolyzing cellulosic biomass and are produced by the microorganism that grown over cellulosic matter. Bacterial Cellulases poses more advantage when compared to the cellulases from other sources. This study aims to determine the optimum conditions of cellulase production from the bacteria Bacillus Circulans CC2 and CC4 in comparison with isolates hydrolize rice straw. CC2 and CC4 isolated from larvae Cossus cossus. The testing to produce cellulase was done with various pH and temperature. The enzyme activity was tested using DNS Method. The results showed that the isolated CC2 and CC4 have the same optimum temperature of 70°C on condition CMC 1%, medium pH 7,0. Crude extract cellulase isolates CC2 work optimally at pH 4 while the isolates CC4 work at pH 7. highest activity in the cellulase enzymes hydrolyze the substrate on cellulose powder with optimum activity at pH 4 CC4 isolates of 2.775 x 10-2 U/ mL, while the enzyme activity CC2 isolates 4.359 x 10-2 U/mL, p this occurs due to the enzymatic hydrolysis of cellulosic substrates with cellulase enzymes will outline the cellulose into glucose which is a simple form