Hydrogen Production from Biomass and Organic Waste Using Dark Fermentation: An Analysis of Literature Data on the Effect of Operating Parameters on Process Performance

In the context of hydrogen production from biomass or organic waste with dark fermentation, this study analysed 55 studies (339 experiments) in literature looking for effect operating parameters on process performance fermentation. The substrate concentration, pH, temperature, and residence time yield, productivity, content biogas was analysed. addition, a linear regression model developed to also account nature pretreatment substrate, inhibition methanogenesis, continuous batch mode. analysis showed that yield mainly affected by pH time, highest yields obtained low short time. High productivity favoured high feed pH. More modest content. mean values were, respectively, 6.49% COD COD−1, 135 mg L−1 d−1, 51% v/v, while 10% considered experiments higher than 15.55% 305.16 64% v/v. Overall, provides insight into how select optimum conditions obtain desired production.