The Selection of Lignin- Degrading Fungus and the Straw Fermentation by Mixed Strains

The crops straw is an important biological resource. Because of its particular composition and structure, the hardly-degradation is always the problem of straw conversion and application. So Attention is paid to the desradation and convertion of the straw into other useful materials.According to the PDA plate culture, shake-flask culture and solid-state fermentation with straw,the best strain which had growth advantage and yielded high activity lignin-degrading enzymes was chosen from 6 common white-rot funguses. In order to degrade and utilize the straw obviously,the two-step mixed fermentation by Pteurorus ostreatus and Trichoderma koningii was used. Through the different combination ways,H6-T10 group can get the best straw degradation result. The lignin degradation rate reached 44.77%, and the cellulose degradation rate was 41.48%.