ABSTRACT
Bharathidasan University, Tiruchirappalli-620024, Tamil Nadu, India
6.1 Introduction .................................................................................. 144 6.2 Materials and Methods ................................................................. 146
6.2.1 Lignocellulosic Materials ................................................. 146 6.2.2 Microorganism and Culture Conditions ........................... 146 6.2.3 Bioethanol Production ...................................................... 147
6.3 Results and Discussion ................................................................ 149 6.3.1 Optimization of Acid Hydrolysis and Temperature ......... 149 6.3.2 Detoxification ................................................................... 158 6.3.3 Fermentation of Acid Hydrolysates ................................. 159
6.4 Conclusion ................................................................................... 166 Keywords .............................................................................................. 167 References ............................................................................................. 167
ABSTRACT
Globally, lignocellulosic materials are considered to be the most abundant renewable source available throughout the world in large quantities for the production of ethanol. The agroeconomic perspective, the present study targeted to exploit the ability of cyanobacteria to convert lignocellulosics for ethanol production. Lignocellulosic materials, coir pith, Prosopis juliflora and Lantana camara L. were allowed to treat with fresh water cyanobacterium (Oscillatoria annae). Bioconversion of lignocellulosics to ethanol requires initial dilute acid hydrolysis and fermentation of yeast (Pichia stipitis). At 36th hour, the O. annae treated L. camara produced maximum ethanol yield of 0.41 g/g (9.36 gL-1). This was succeeded by the O. annae treated P. juliflora ethanol yield of 0.42 g/g (9.022 gL-1) and least amount of 0.474 g/g (4.32 gL−1) was obtained with O. annae treated coir pith. Hence, the O. annae treated lignocellulosics rendered higher amount of ethanol as compared with the fermentation of yeast (P. stipitis) alone. Thus, the study clearly evidenced that the O. annae degrades lignocellulosic and making it a better source for ethanol production by yeast (P. stipitis) fermentation.
