Effective bead preparation of coimmobilized methanogenic and methanotrophic bacteria for tetrachloroethene degradation.

Three types of coimmobilized methanogenic and methanotrophic bacterial beads--Ca-alginate, Ba-alginate, and Ca-alginate chitosan--were used for tetrachloroethene (PCE) degradation. For the purpose of effective preparation of coimmobilized bacterial beads, the diameter and broken-loading of beads were measured. The activity tests to find the optimal bacteria concentration in the bead were performed.