ABSTRACT Oil palm empty fruit bunches (OPEFB) is the largest solid waste causing buildup. The attempt to overcome the accumulation of EFB is composting. Composting of OPEFB takes 6-12 months because it contains cellulose, hemicellulose and lignin. The effort to speed up the composting is cellulolytic bacteria. The research aim was to determine the effect of several cellulolytic bacteria in…