Effect of inoculum conditioning on hydrogen fermentation and pH effect on bacterial community relevant to hydrogen production

Enhanced biohydrogen production from beverage industrial wastewater using external nitrogen sources and bioaugmentation with facultative anaerobic strains

“…Previous studies have reported that Clostridium spp. are good hydrogen producers and they survive during the heat pretreatment [23,24]. Our findings also confirm that the heat treatment has enriched the Clostridium spp.…”

Fermentative Hydrogen Production by Molasses; Effect of Hydraulic Retention Time, Organic Loading Rate and Microbial Dynamics

“…and Coprothermobacter sp. in untreated digester sludge negatively influenced hydrogen production (Kawagoshi et al, 2005). The same was suggested for Sporolactobacillus sp.…”

Biological hydrogen production from sterilized sewage sludge by anaerobic self-fermentation

“…In the initial stage of anaerobic fermentation, the hydrogen-consuming action was weak and unconspicuous because of fewer hydrogen-consuming microorganisms and their lower growth rate compared with hydrogen-producing ones. In the later stage of anaerobic fermentation, the hydrogen-consuming action became obvious along with the increase in hydrogenconsuming microorganisms [6][7][8]24]. (2) The increase of VFA, particularly, acetic acid could inhibit further growth of hydrogenproducing microorganisms and then result in the decrease of the hydrogen production rate [25].…”

“…Many hydrogen-producing microorganisms can form endospores, which can be considered "survival structures" developed by these organisms when unfavorable environmental conditions are encountered, e.g., high temperature, and harmful chemicals including acid and alkaline [6][7][8]. When favorable conditions return, the spores germinate and become vegetative cells [9,10].…”