title: Anaerobic batch conversion of pine wood torrefaction condensate.
abstract: Organic compound rich torrefaction condensate, owing to their high water content and acidic nature, have yet to be exploited for practical application. In this study, microbial conversion of torrefaction condensate from pine wood through anaerobic batch digestion (AD) to produce methane was evaluated. Torrefaction condensate exhibited high methane potentials in the range of 430-492mL/g volatile solids (VS) and 430-460mL/gVS under mesophilic and thermophilic conditions, respectively. Owing to the changes in the composition, the methane yields differed with the torrefaction condensates produced at different temperatures (225, 275 and 300°C), with a maximum of 492±18mL/gVS with the condensate produced at 300°C under mesophilic condition. The cyclic batch AD experiments showed that 0.1VSsubstrate:VSinoculumis optimum, whereas the higher substrate loading (0.2-0.5) resulted in a reversible inhibition of the methane production. The results suggest that torrefaction condensate could be practically valorized through AD.
authors.affiliation: Department of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, FI-33101 Tampere, Finland. Electronic address: tharaka.doddapaneni@tut.fi.
authors.forename: Tharaka Rama Krishna C
authors.initials: TRKC
authors.lastname: Doddapaneni
authors.affiliation: Department of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, FI-33101 Tampere, Finland.
authors.forename: Ramasamy
authors.initials: R
authors.lastname: Praveenkumar
authors.affiliation: Department of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, FI-33101 Tampere, Finland.
authors.forename: Henrik
authors.initials: H
authors.lastname: Tolvanen
authors.affiliation: Department of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, FI-33101 Tampere, Finland.
authors.forename: Marja R T
authors.initials: MRT
authors.lastname: Palmroth
authors.affiliation: Department of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, FI-33101 Tampere, Finland.
authors.forename: Jukka
authors.initials: J
authors.lastname: Konttinen
authors.affiliation: Department of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, FI-33101 Tampere, Finland.
authors.forename: Jukka
authors.initials: J
authors.lastname: Rintala
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D006358:Hot Temperature; D008697:Methane / Q000032:analysis / Q000096:biosynthesis / Q000378:metabolism; D028223:Pinus / Q000737:chemistry*; D014934:Wood / Q000737:chemistry*
chemical_list: D008697:Methane
keywords: Acetic acid; Anaerobic digestion; Condensate; Methane; Torrefaction