title: Rapid estimation of the biochemical methane potential of plant biomasses using Fourier transform mid-infrared photoacoustic spectroscopy.
abstract: Biochemical methane potential (BMP) is a very important characteristic of a given feedstock for optimisation of its use in biogas production. However, the long digestion time needed to determine BMP is the main limitation for the use of this assay during the operation of anaerobic digesters to produce biogas. Fourier transform mid-infrared photoacoustic spectroscopy (FTIR-PAS) was used to predict the BMP of 87 plant biomasses. The developed calibration model was able to explain 81% of the variance in the measured BMP of a selected test set with a root mean square error (RMSE) of 40NLCH4kg(-1) of volatile solids (VS) and a ratio of performance to deviation (RPD) of 2.38. The interpretation of the regression coefficients used in the calibration revealed a positive correlation of BMP with easily degradable compounds (amorphous cellulose, hemicellulose and aliphatic compounds) and a negative correlation with inhibitors of cellulose hydrolysis (lignin, hemicellulose).
authors.affiliation: Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C DK-1871, Denmark.
authors.forename: Georgios
authors.initials: G
authors.lastname: Bekiaris
authors.affiliation: Institute of Chemical Engineering, Biotechnology and Environmental Technology, Faculty of Engineering, University of Southern Denmark, Campusvej 55, Odense M DK-5230, Denmark.
authors.forename: Jin M
authors.initials: JM
authors.lastname: Triolo
authors.affiliation: Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C DK-1871, Denmark.
authors.forename: Clément
authors.initials: C
authors.lastname: Peltre
authors.affiliation: Institute of Chemical Engineering, Biotechnology and Environmental Technology, Faculty of Engineering, University of Southern Denmark, Campusvej 55, Odense M DK-5230, Denmark.
authors.forename: Lene
authors.initials: L
authors.lastname: Pedersen
authors.affiliation: Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C DK-1871, Denmark.
authors.forename: Lars S
authors.initials: LS
authors.lastname: Jensen
authors.affiliation: Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C DK-1871, Denmark. Electronic address: sab@plen.ku.dk.
authors.forename: Sander
authors.initials: S
authors.lastname: Bruun
mesh_terms: D056804:Biofuels; D018533:Biomass; D002138:Calibration; D002482:Cellulose / Q000378:metabolism; D008031:Lignin / Q000378:metabolism; D008697:Methane / Q000096:biosynthesis*; D061088:Photoacoustic Techniques / Q000379:methods; D010944:Plants / Q000737:chemistry / Q000378:metabolism*; D011134:Polysaccharides / Q000378:metabolism; D025341:Principal Component Analysis; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*
chemical_list: D056804:Biofuels; D011134:Polysaccharides; C007916:hemicellulose; D002482:Cellulose; D008031:Lignin; D008697:Methane
keywords: Biochemical methane potential (BMP); Calibration model; FTIR-photoacoustic spectroscopy; Prediction