Source for cellulase system extraction is best suitable from microbial system found in the gut of organisms thriving on cellulosic biomasses as their major feed. Insects like termites (Isopteran), bookworm (Lepidoptera), and so forth, are found to have syntrophic symbiotic microflora in their guts responsible for cellulosic feed digestion. Many microorganisms have been reported with cellulosic activities including many bacterial and fungal strains both aerobic and anaerobic. Chaetomium,Fusarium Myrothecium, Trichoderma. Penicillium, Aspergillus, and so forth, are some of the reported fungal species