Abstract: In the structure of lignocellulosic biomass,lignin is the natural resistant barrier in the biological degradation of cellulose and hemicellulose. The most critical step to break the barrier,which is the bottleneck of biological conversion and utilization,is pretreatment. The recent research progresses of steam explosion pretreatment technology and biological pretreatment technology of lignocellulose are summarized in this article,and the recent research progress of steam explosion-biological combination pretreatment is introduced. This paper also analyses main types of inhibitors and their mechanisms of products during steam explosion pretreatment. A new pretreatment with the detoxification function, steam explosion-biological combination pretreatment,as well as the development direction of the research of efficient pretreatment technology for lignocellulose, is proposed.

Key words: steam explosion, biological pretreatment, detoxification