Bioethanol from sweet sorghum: Simultaneous saccharification and fermentation of carbohydrates by a mixed microbial culture

Bioethanol production from sweet potato (Ipomoea batatas L.) flour using co-culture of Trichoderma sp. and Saccharomyces cerevisiae in solid-state fermentation

“…Yeasts have a pH optimum between 4.0 and 6.0, and can grow in a large pH range of 2.5 to 8.5 (Narendranath and Power 2005). Temperature in the range of 25 to 30 °C is commonly found optimum for mesophillic S. cerevisiae strain for the production of ethanol in SSF of various substrates, i.e., apple pomace (Hang et al 1986), carob pod (Roukas 1994), sweet sorghum (Mamma et al 1996), etc. …”

Chemical-free Processing of Sweet Sorghum Juice of Cultivar Sucrosorgho 506

“…Although the major part of carbohydrates can be withdrawn in the juice, a lesser, but not ignorable part remains in the bagasse. Focusing exclusively on juice and its carbohydrate content, sources indicate that it is a good source of ethanol fermentation all over the world starting from USA [9][10][11] via Australia [12,13], India [14], Europe [15][16][17] and Africa [18] and last but not least China [19].…”

Sorghum as a Multifunctional Crop for the Production of Fuel Ethanol: Current Status and Future Trends

“…Compared to sugar cane, the main difference is that the sucrose content in cane is significantly higher compared to glucose and fructose (90, 4 and 6%respectively) and the total content sugar is 49% of the dry stem weight. In general terms, composition of simple sugars in sweet sorghum juice is 53-85, 9-33 and 6-21% for sucrose, glucose and fructose, respectively (Gnansounou et al, 2005;Mamma et al, 1996;Phowchinda et al, 1997;Prasad et al, 2007). Beyond the proportion of soluble sugars in sweet sorghum plants, the yield of total sugars per harvested area is a better guide in the analysis for fuel production.…”

“…One of the most significant problems in ethanol production from lignocellulose is production cost (Mizuno et al, 2009) because the fiber conversion requires of high energy investments in order to obtain high concentrations of fermentable sugars from the insoluble polymers (Kurian et al, 2010;Mamma et al, 1996). A pre-hydrolysis step releases both the hemicellulosic and cellulosic fractions of the fiber (Herrera et al, 2003).…”

“…Approximately 13% are non-structural carbohydrates composed of sucrose, glucose and fructose, in variable amounts according to cultivar, harvesting season, maturity stage, among other agronomic factors (Mamma et al, 1996;Phowchinda et al, 1997). Anglani (1998) suggests a classification of sweet sorghums based on proportion of soluble sugars in the juice.…”