Comparison and evaluation of concurrent saccharification and anaerobic digestion of Napier grass after pretreatment by three microbial consortia

Evaluation of different pretreatments of Napier grass for enzymatic saccharification and ethanol production

“…Biological pretreatment is another method that uses lignin‐degrading fungi to decompose lignin and breakdown the recalcitrant linkage between lignin and hemicellulose. After microbial pretreatment, cellulose is thus more exposed to hydrolysis and the saccharide yield from Napier grass can be enhanced . In addition, two‐stage pretreatment processes have often been used.…”

“…After microbial pretreatment, cellulose is thus more exposed to hydrolysis and the saccharide yield from Napier grass can be enhanced. 6,12 In addition, two-stage pretreatment processes have often been used. Biomass of Napier grass was presoaked with 1% H 2 SO 4 , or 1% NaOH, and then exposed to 75 and 150 kGy of electron beam irradiation.…”

Comparative biochemical methane potential of paragrass using an unacclimated and an acclimated microbial consortium

“…Since lignin binds hemicelluloses, the higher lignin content in the Napier grass makes microbial biodegradation of it more difficult. It has been reported (Wen et al, 2015) that the methane yield of untreated Napier grass was 188 ml/g VS, whereas the maximum methane yield of Napier grass pretreated by the consortia MC1, WSD-5 and XDC-2 were 259, 279, 247 ml/g VS, respectively.…”

“…However, no significant differences in biogas and methane yields and in volatile solids reduction was found when the enzyme products were tested in the anaerobic digestion systems. A recent study on Napier grass reported the enhancement of the maximum methane yield of Napier grass pretreated by microbial consortia constructed for rapid degradation of lignocelluloses (Wen et al, 2015). The maximum methane yield of samples pretreated by the consortia MC1 (Clostridium straminisolvens as the most dominant microbial species), WSD-5 (Coprinus cinereus and Ochrobactrum sp.)…”

Mesophilic–hydrothermal–thermophilic (M–H–T) digestion of green corn straw

“…Recent research has mainly focused on pretreatment of straw to enhance biogas production, including pretreatment with extrusion , microbial consortia (Wen et al, 2015), enzymatic hydrolysis (Gao et al, 2012), steam explosion (Theuretzbacher et al, 2015), hydrothermal conditions using liquid hot water or steam (Gonzalez et al, 2014;He et al, 2014), ammonia (Yang et al, 2014), sodium hydroxide (Di Girolamo et al, 2014;Li et al, 2014), hydrochloric acid (Han et al, 2012), or sulfuric acid (Nasirian et al, 2011). Usually, microbial pretreatment consumes a carbon source, which expectedly is used as a substrate for methane production.…”