Tuesday, April 30, 2013
Exhibit Hall
Lignocellulosic materials are the most economic and highly renewable natural resources in the world. Lignocellulosic materials contain sugars polymerized to cellulose and hemicellulose that can be liberated by hydrolysis and subsequently fermented by microorganisms to form different chemicals. Cellulose, hemicellulose, and lignin in plant biomass have been foreseen as useful resources convertible to not only pulp and foodstuff but also energy resources such as alcohol, methane and chemical raw materials such as furfural and organic acids. Pretreatment is an essential element in the bioconversion of lignocellulosic substrates. The pretreatment of lignoccellulosic is primarily employed to increase the accessible surface area of cellulose to enhance the conversion of cellulose to glucose. It is required for efficient enzymatic hydrolysis of biomass because of the chemical barriers that inhibit the accessibility of enzyme to the cellulose substrate. Helianthus tuberosus is easy to cultivate for its strong adaptability to a wide range of soil types and pH levels. Unlike the grain crops, Helianthus tuberosus can grow well in non-fertile land and is resistant to plant diseases, not competing with grain crops for arable land. In this study, we had performed pretreatment process by acid and alkaline solutions and researched the optimization of Helianthus tuberosus residue pretreatment by the response surface method (RSM). The pretreatment conditions had been determined that the temperature conditions have been at range of 150 ~ 200 °C. We had been confirmed the optimized pretreatment conditions for Helianthus tuberosus residue by acid and alkaline.