Switchgrass bales were sampled to screen for plant–polymer degrading fungi.
A new strain of Trichoderma atroviride was isolated.
The isolate produced considerable CMCase, xylanase and 尾-glucosidase activities.
Ammonia-pretreated switchgrass was saccharified by T. atroviride enzymes.
Hydrolyzate was converted to butanol and organic acids by Clostridium beijerinckii.