Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5146553 | International Journal of Hydrogen Energy | 2017 | 7 Pages |
Abstract
In this study, waste paper was used as the raw material for hydrogen gas production by dark fermentation at different initial substrate and cell concentrations. Glucose obtained from acid hydrolyzed waste paper was used at six different concentrations between 3.84 and 45.5 gLâ1 to determine the effects of sugar concentration on bio-hydrogen production. The highest cumulative hydrogen gas was obtained at 18.9 gLâ1 initial sugar concentration. Sugar concentrations above 18.9 gLâ1 resulted in product inhibition. Similarly, the initial biomass concentration was varied between 0.25 and 2 gLâ1 while sugar concentration was kept constant at 18.58 ± 2.45 gLâ1 to determine the effects of initial biomass concentration. The highest cumulative hydrogen gas production was obtained with the initial biomass concentration of 0.5 gLâ1. The highest hydrogen yield (140 ml H2 gâ1 total sugar) was observed at 3.84 gLâ1 total sugar concentration. Hydrogen yield decreased with increasing initial sugar concentration due to inhibition by volatile fatty acids (VFAs) produced by dark fermentation and furan derivatives produced from acid hydrolysis of waste paper.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Serkan Eker, Meltem Sarp,