Isolation of cellulose-degrading microbes for rice straw decomposition

Abstract

The results of selecting microorganisms capable of decomposing cellulose in Vinh Long province showed that 46 actinomyces, 16 bacterial strains and 7 strains of fungi which have the ability to degrade cellulose were isolated and purified in 21 soil, sawdust and straw samples. Based on Carboxymethyl cellulose activity test results at the temperature of 40oC, 45oC, and 50oC, we identified five actinomyces(X20, X7, X39, X4, and X24), six bacterial strains (V7, V8, V11, V12, V14, and V16),and four fungal strains(A1, A2, A4, and A5) which all havestrong capabilities to decompose cellulose. Combining CMC test with straw test, we selected three actinomyces strains(X7, X24, and X20), two bacterial strains (V7 and V12), and three fungal strains (A1, A2, and A4) which have a good heat resistance and strong straw decomposition capability from agricultural waste materials.