Sugar cane bagasse prehydrolysis using hot water

Abstract

-Results are presented on the hot water prehydrolysis of sugar cane bagasse for obtaining ethanol by fermentation. The experimental study consisted of the determination of the effect of temperature and time of prehydrolysis on the extraction of hemicelluloses, with the objective of selecting the best operating conditions that lead to increased yield of extraction with a low formation of inhibitors. The study, carried out in a pilot plant scale rotational digester, using a 3 2 experimental design at temperatures of 150-190°C and times of 60-90 min, showed that it is possible to perform the hot water prehydrolysis process between 180-190°C in times of 60-82 min, yielding concentrations of xylose ≥ 35 g/L, furfural ≤ 2.5 g/L, phenols from soluble lignin ≤ 1.5 g/L, and concentrations ≤ 3.0 g/L of hemicelluloses in the cellolignin residue. These parameters of temperature and prehydrolysis time could be used for the study of the later hydrolysis and fermentation stages of ethanol production from sugar cane bagasse.

Evaluation of Composition, Characterization and Enzymatic Hydrolysis of Pretreated Sugar Cane Bagasse

“…The results obtained by applying the hydrothermal pretreatment were similar to those obtained for other biomass such as grape stalks, corn stalks, grass (Cynodon dactylon), sorghum, wood, olive tree prunings, eucalyptus, bamboo, wheat straw and sugarcane bagasse (Amendola et al, 2012;Egues et al, 2012;Lee et al, 2009;Rohowsky et al, 2013;Chen et al, 2010;Martin et al, 2010;Alves et al, 2010;Ruiz et al, 2013a;Ruiz et al, 2013b;Abril et al, 2012). Figure 2 shows the results of the morphological analysis of the raw material and solid fraction of the pretreated bagasse by SEM.…”

Capability of Candidas to Ferment Mixtures of Carbohydrates to Alcohol in Free Cells and Co-Culture

“…This high concentration is used looking to get a higher concentration of alcohol. Similar concentrations of glucose were obtained in sugar cane bagasse and grape must [21,22]. In grape must processing it was reported a consumption of carbohydrates with S. cerevisiae UCD522 of 69.54% and C. sake CBS5093 of 44.69%.…”

Processing of Biomass with Hydrothermal and Supercritical Water

“…A total conversion of the lignin part and the repolymerized compounds is only possible at high temperatures and short-reaction times, or with the addition of oxygen. Similar investigations on conversion of lignocellulosic material are reported in the literature, for example, on the conversion of rice straw [111], corn stover [112], brewery waste [31], and bagasse [113][114][115]. …”

Production of polyhydroxyalkanoates (PHA) from a non‐lignocellulosic component of sugarcane bagasse: fueling a biobased economy

“…The bagasse was allowed to boil in the water for 5–7 minutes, and filtered through a muslin cloth. Differing concentrations of the filtrate (20%, 40%, 60%, 80%, and 100%) were used as a substrate for PHA induction . The bagasse fibers remaining in the muslin cloth were collected and stored for further use.…”

Comparison between continuous and batch processing to produce xylanase by penicillium canescens 10-10c

“…To overcome these problems, natural solid raw materials are replaced by soluble substrates that promote good growth and induction of enzyme production. Several examples of the extraction of xylooligosacharides by thermal treatment or with the aid of acidic or alkaline solutions have been reported (Pessoa Jr. et al, 1997;Sun et al, 2000;Lavarack et al, 2002;Kim et al, 2002;Abril et al, 2012). Therefore, in this study, barley straw hydrolysate was utilized as a soluble inducer for xylanase production from Penicillium canescens in batch and continuous culture.…”