Researchers isolated and studied cellulose-degrading bacteria from compost, identifying them as Bacillus licheniformis. Three strains (B4, B7, and B8) showed the highest cellulase activity. B4 and B8 had peak activity in the stationary growth phase, while B7's peak was in the log phase. All three strains released more sugar as their cellulase activity increased. Protein content was closely linked to cellulase activity. B7's crude cellulase worked on cellulose and filter paper but not on PNPG. B7's cellulase was most active at 50°C and pH 6-7.