Journal
JOURNAL OF CENTRAL SOUTH UNIVERSITY
Volume 24, Issue 6, Pages 1281-1287Publisher
JOURNAL OF CENTRAL SOUTH UNIV
DOI: 10.1007/s11771-017-3533-6
Keywords
Macrocystis pyrifera biomass residues; pretreatment; fermentation; hydrogen
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Funding
- Key Research & Development Project of Shandong Province, China [2015GSF117016]
- National Science and Technology Pillar Program during the 12th Five-Year Plan Period [2014BAC31B01]
- Foundation of Key Program of Science and Technology of Shandong Province, China [2015GSF115037]
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The Macrocystis pyrifera biomass residues (MPBRs) after extraction of algin could be applied in anaerobic fermentation. The effects of different pretreatment conditions, substrate concentrations and initial pH values on hydrogen and volatile fatty acid (VFA) production during the anaerobic fermentation of MPBRs were evaluated. The optimal pretreatment conditions, substrate concentration, initial pH values were determined as thermo-alkaline pretreatment at 100 A degrees C with 0.1 mol/L NaOH, 40 g/L and 7.0, respectively. Under these conditions, the maximum hydrogen production was 11.38 mL/g (volatile solids, VS), which was approximately 23 times higher than that of untreated MPBRs. Furthermore, the maximum total volatile fatty acid (TVFA) yield was found to be 0.055 g/g (VS) and the VFA mainly consisted of acetic and butyric acids. The results indicate that the yield of TVFA is positively correlated with hydrogen production, and the MPBRs could produce hydrogen and TVFA simultaneously. In addition, thermo-alkaline pretreatment is proven to be the best method for hydrogen and VFA production.
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