pls, i will like to ask if u intent extracting cellulase enzyme or cellulose

Probably a little too late, I dont now what you intend to do with this, but I have found that sonication for 30s and centrifugation (33,000 x g) could remove the cell pellet from the Exopolymeric substances. These are really old techniques, and there are more depending on your needs. There are many papers that explain these methods, personaly I liked this one: "Comparison of bacterial extracellular polymer extraction methods by M.J. Brown and J.N. Lester, 1980"