Abstract
The aim of this work was the utilization of an anaerobic fermentation of the bird-cherry leaves for hydrogen bioproduction. Various feed-to-inoculum ratios F/I = 0.58, 1.16, and 2.32 were examined. The mixture of enzymes was used as a pretreatment in order to increase the production of hydrogen. The highest cumulative hydrogen production 12.11 cm3 g−1 volatile solids for pure leaves was achieved in the case of F/I = 1.16 ratio. After the addition of the enzyme mixture into the system more than 40 cm3 g−1 volatile solids of hydrogen was obtained. An elevated concentration of both acetic and propionic acid was detected in the sludge water at the end of the hydrogen production. Hydrogen generation was also mathematically described by the modified Gompertz equation. Our results clearly show that the hydrogen bioproduction (lignocellulosic fermentation) can be considerably increased by the utilization of the specific enzyme mixture. Moreover, the utilization of the enzymes mixture can be interesting in the case of chemically complex systems that are dominant in wastewater treatment plant.
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Acknowledgments
This work was supported by the Slovak Scientific Grant Agency (VEGA) under grant No. 1/0589/12. This study was also supported by SAS—MOST Joint Research Cooperation (Bilateral project Slovakia—Taiwan) No. SAS-MOST JRP 2014/3: “exploring microbial diversity and functionality in thermophilic bioreactors for innovation in biotechnology.”
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Špalková, V., Lazor, M., Smolinská, M. et al. Enhanced hydrogen bioproduction from bird-cherry leaves using enzyme mixture. Monatsh Chem 147, 201–206 (2016). https://doi.org/10.1007/s00706-015-1572-y
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DOI: https://doi.org/10.1007/s00706-015-1572-y