A two-stage bioprocess for hydrogen and methane production from rice straw bioethanol residues

Comparative evaluation of hydrogen fermentation of de-oiled Jatropha waste hydrolyzates

“…However, removal of toxic substances from hydrolyzates is an expensive process; the alternative could be development of mixed consortia which could tolerate these toxic substances. A similar effect was also observed in a study using rice straw bioethanol residues for fermentative hydrogen production [29]. There is a contradiction in the relationship between B/A ratio and the corresponding hydrogen yield, since the basic conversion reactions of butyrate formation reveals that hydrogen is utilized during the butyrate formation, and it is not a favorable one.…”

Feasibility of enriched mixed cultures obtained by repeated batch transfer in continuous hydrogen fermentation

“…Generally, these two species are reported as potential hydrogen producers with the formation of butyrate and acetate as the major excreting metabolic product during the hydrogen fermentation and provided the stable hydrogen turnouts in the optimal pH range of 5.5e6.0 [38e40]. Besides, it has been reported that homoacetogenesis would also reduce the hydrogen yield, though the acetate production is high, additionally, B/A ratio attributes towards the higher production performances [27,41,42] (Fig. 7).…”

Biological butanol production from microalgae-based biodiesel residues by Clostridium acetobutylicum

“…The medium for Clostridium species was used for pre-culture growth and batch experiment (Whang et al, 2011;Cheng et al, 2012c). Each liter of the medium was supplemented with the following chemicals (in mg): Sodium ammonia (400 mg-N/L) and peptone (360 mg/L) were added as nitrogen source, and trace amount of resazurin (0.175 mg/L) was also added as the redox-status indicator.…”