Influence of Yeast and Enzyme Variation on Bioethanol Yield

Abstract

This is a study concerning the procedures of bio-ethanol production from the wood based biomass hydrolysates’ fermentation process. Required process conditions are analyzed and experimental data include raw material properties; bio-ethanol productivity and its impacts are evaluated to illustrate how the bio-ethanol production potential relates with the variation of the yeasts types.

Theoretical background and experimental based research are majorly applied to achieve two targets that the final thesis composition requires: first process knowledge accumulation which gives the solid foundation for principle under-standing and related experimental operations; and secondly real-life process data and result analysis of the experiments that provide the scientific support to the thesis opinion establishment.

The result of this study can be concluded as follow: after the study of the bio-ethanol production from woody raw material, the related chemical and bio-logical process as are expected to receive higher productivity and faster process period by applying the additional usage of specific and appropriate type of enzyme. According to the final results, we might understand that although the wood chips are able to be used as the raw material for bio-ethanol production, its productivity is relatively lower and process is considerably more difficult than the traditional agriculture based bio-ethanol production, for instance: bio-ethanol production from using sugar products and starch crops as raw materials.

However, due to the concerns of world`s food security and the trend of the new bio-energy developments and applications, the usage of forest based raw materials is still considered as one of the major methods of bio-ethanol production.