Journal
JOURNAL OF BIOTECHNOLOGY
Volume 286, Issue -, Pages 71-78Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jbiotec.2018.09.004
Keywords
Lignocellulosic biomass; Alkaline hydrogen peroxide pretreatment; Acidic hydrolysis; Enzymatic hydrolysis; Dark fermentation; Metabolic pathway
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Funding
- PNPD/CAPES (Programa Nacional de Pos Doutorado/Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior) from Brazilian Government
- CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico) from Brazilian Government
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Cashew apple bagasse (CAB) has been studied as feedstock for the biohydrogen production using Clostridium roseum and the dark fermentation process. Pretreatment with alkaline hydrogen peroxide (CAB-AHP) on raw material and the acid and enzymatic hydrolysis have been taken into account to evaluate the H-2 yields. Results show that the acid hydrolysate obtained from CAB produced higher H-2 molar yield (HMY) (15 mmol(H2)/L-hydrolysate) than the acid hydrolysate from CAB-AHP (4.99 mmol(H2)/L-hydrolysate), These HMY were noticeably higher than values obtained from the enzymatic hydrolysate of CAB-AHP (1.05 mmol(H2)/L-hydrolysa) and the enzymatic hydrolysate of CAB (0.59 mmol(H2)/L-hydrolysa). The maximum biohydrogen productivity (12.57 mL(H2)/L.h) was achieved using the acid hydrolysate from CAB, with a H-2 content of about 72% vol, that could be satisfactory in view of an energetic applications of the biogas. Results suggest that CAB could be considered for the hydrogen production process, providing an appropriate destination for this lignocellulosic biomass, and consequently, reducing the environmental impact it can exert.
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