By a News Reporter-Staff News Editor at Journal of Engineering -- Investigators publish new report on Chemical Engineering. According to news reporting originating in Orono, Maine, by VerticalNews journalists, research stated, "In this study a forest biorefinery concept based on larch wood was technically and economically evaluated. Two slightly different cases of a larch-based biorefinery were compared to conventional kraft pulping."
The news reporters obtained a quote from the research from the University of Maine, "The wood chips of Larix sibirica (Lebed.) were pre-extracted (PE) and washed with water prior to pulping, in order to generate an additional sugar side-stream. The sugars were hydrolyzed into monosugars, which were then fermented by Bacillus coagulans into lactic acid. The lactic acid needs to be purified before sold to the market. By pulping the pre-extracted wood chips with anthraquinone (AQ) and polysulfide (PS), the pulp yield loss was reduced. The pulp was then bleached (O-D0-Ep-D1-P). The products of this larch biorefinery are bleached softwood pulp and lactic acid. Three process cases were simulated: conventional kraft pulping, PE-PSAQ with 0.5% PS, and PE-PSAQ with 2% PS, in terms of mass and energy balances. Considering the availability of larch resources, this kind of a biorefinery could suitably be located in Siberia, Russia. Market prices were collected, and based on the simulation results, cash flows were determined. Sensitivity analysis was carried out, and investment costs were estimated."
According to the news reporters, the research concluded: "Based on the simulation with the addition of a lactic acid production line to an existing pulp mill, the payback time for the investment costs would be about 16 months."
For more information on this research see: Larch Biorefinery: Technical and Economic Evaluation. Industrial & Engineering Chemistry Research, 2014;53(3):1206-1213. Industrial & Engineering Chemistry Research can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Industrial & Engineering Chemistry Research - www.pubs.acs.org/journal/iecred)
Our news correspondents report that additional information may be obtained by contacting H.S. Horhammer, Univ Maine, Dept. of Chem & Biol Engn, Orono, ME 04469, United States. Additional authors for this research include T.H. Treasure, R.W. Gonzalez and A.R.P. van Heiningen.
Keywords for this news article include: Orono, Maine, United States, Chemical Engineering, North and Central America
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC