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A larch based biorefinery: pre-extraction and extract fermentation to lactic acid.
- Source :
-
Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood . Jun2011, Vol. 65 Issue 4, p491-496. 6p. 1 Diagram, 3 Charts, 3 Graphs. - Publication Year :
- 2011
-
Abstract
- In a forest based biorefinery, pulp and paper are the main products, while side-streams are utilized for value-added products. One biorefinery concept is to remove hemicelluloses from wood by extraction prior to pulping and converting them into biofuels or chemicals. This study presents a concept of a larch wood based biorefinery and focuses on the mass balance of pre-extraction. Sugar rich extracts were obtained by hot water extraction of Siberian larch ( Larix sibirica Lebed.) wood chips at different temperatures and times. At 160°C and 60-90 min the extract contains 13-16% hemicelluloses (on wood). The composition of extracts and extracted wood has been determined to have a basis for mass balances. Fermentation of the hydrolyzed extract with Bacillus coagulans MXL-9 resulted in consumption of all C6 and C5 sugars and produced lactic acid in high yield. In an earlier work, it was demonstrated that water pre-extraction of larch chips followed by polysulfide-anthraquinone (PSAQ) pulping still produced a good papermaking pulp at a yield comparable to the corresponding non-extracted kraft pulp. Accordingly, the present results show that a larch wood based biorefinery has a potential for industrial application. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00183830
- Volume :
- 65
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood
- Publication Type :
- Academic Journal
- Accession number :
- 61192326
- Full Text :
- https://doi.org/10.1515/HF.2011.085