title: Pretreatment of the macroalgae Chaetomorpha linum for the production of bioethanol--comparison of five pretreatment technologies.
abstract: A qualified estimate for pretreatment of the macroalgae Chaetomorpha linum for ethanol production was given, based on the experience of pretreatment of land-based biomass. C. linum was subjected to hydrothermal pretreatment (HTT), wet oxidation (WO), steam explosion (STEX), plasma-assisted pretreatment (PAP) and ball milling (BM), to determine effects of the pretreatment methods on the conversion of C. linum into ethanol by simultaneous saccharification and fermentation (SSF). WO and BM showed the highest ethanol yield of 44 g ethanol/100g glucan, which was close to the theoretical ethanol yield of 57 g ethanol/100g glucan. A 64% higher ethanol yield, based on raw material, was reached after pretreatment with WO and BM compared with unpretreated C. linum, however 50% of the biomass was lost during WO. Results indicated that the right combination of pretreatment and marine macroalgae, containing high amounts of glucan and cleaned from salts, enhanced the ethanol yield significantly.
authors.affiliation: Department of Chemical and Biochemical Engineering, Technical University of Denmark, Søltofts Plads 229, DK-2800 Lyngby, Denmark. nsj@geus.dk
authors.forename: Nadja
authors.initials: N
authors.lastname: Schultz-Jensen
authors.forename: Anders
authors.initials: A
authors.lastname: Thygesen
authors.forename: Frank
authors.initials: F
authors.lastname: Leipold
authors.forename: Sune Tjalfe
authors.initials: ST
authors.lastname: Thomsen
authors.forename: Christian
authors.initials: C
authors.lastname: Roslander
authors.forename: Hans
authors.initials: H
authors.lastname: Lilholt
authors.forename: Anne Belinda
authors.initials: AB
authors.lastname: Bjerre
mesh_terms: D056804:Biofuels; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D002241:Carbohydrates / Q000032:analysis; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation / Q000187:drug effects; D006868:Hydrolysis / Q000187:drug effects; D010084:Oxidation-Reduction / Q000187:drug effects; D058626:Plasma Gases / Q000494:pharmacology; D012624:Seaweed / Q000737:chemistry / Q000187:drug effects / Q000378:metabolism*; D013227:Steam; D013696:Temperature; D014867:Water / Q000494:pharmacology
chemical_list: D056804:Biofuels; D002241:Carbohydrates; D058626:Plasma Gases; D013227:Steam; D014867:Water; D000431:Ethanol