Dark-fermentative hydrogen production from synthetic lignocellulose hydrolysate by a mixed bacterial culture: The relationship between hydraulic retention time and pH conditions
[ 1 ] Instytut Inżynierii Środowiska i Instalacji Budowlanych, Wydział Inżynierii Środowiska i Energetyki, Politechnika Poznańska | [ P ] pracownik
2022
artykuł naukowy
angielski
- Biohydrogen
- Pentose
- Hexose
- Dark fermentation
- Continuous stirred tank reactor
EN This study assessed the effect of hydraulic retention time (HRT) ranging from 24 to 3 h on continuous dark-fermentative H2 production in four bioreactors operated at pH 5.0, 5.5, 6.0 and 6.5. A mixture of cellobiose, xylose and arabinose was used as the substrate. The highest hydrogen production rate between HRTs of 24 and 12 h was observed at pH 6.5, while at HRT below 12 h at pH 6.0. At a HRT of 3 h it reached 11.4 L H2/L-d. Thus, the optimum pH for H2 production depends on the HRT. The highest sugar utilization was obtained at pH 6.0 and 6.5 and decreased in the following order: cellobiose > xylose > arabinose. The pH conditions, in contrast to HRT, were found to have a significant influence on the bacterial composition. Low diversity in bacterial culture dominated by the Clostridium genus allows for stable and high H2 production performance.
127309-1 - 127309-10
Article Number: 127309
CC BY-NC-ND (uznanie autorstwa - użycie niekomercyjne - bez utworów zależnych)
czasopismo hybrydowe
ostateczna wersja opublikowana
przed opublikowaniem
140
11,4