| Title: | "Real time monitoring of a biogas digester with gas chromatography, near-infrared spectroscopy, and membrane-inlet mass spectrometry" |
| Author(s): | Ward AJ; Bruni E; Lykkegaard MK; Feilberg A; Adamsen AP; Jensen AP; Poulsen AK; |
| Address: | "Department of Biosystems Engineering, Faculty of Agricultural Sciences, Aarhus University, Blichers Alle 20, DK-8830 Tjele, Denmark" |
| DOI: | 10.1016/j.biortech.2010.12.052 |
| ISSN/ISBN: | 1873-2976 (Electronic) 0960-8524 (Linking) |
| Abstract: | "Four methods of monitoring the anaerobic digestion process were studied at pilot scale. The methods employed were Micro Gas Chromatography (mu-GC) and Membrane Inlet Mass Spectrometry (MIMS) for measurements in the gas phase, Near Infrared Spectroscopy (NIRS) and pH in the liquid phase. Micro Gas Chromatography accurately measured H(2), CH(4), H(2)S, N(2) and O(2) in the headspace whereas the MIMS accurately measured CH(4), CO(2), H(2)S, reduced organic sulfur compounds and p-cresol, also in the headspace. In the liquid phase, NIRS was found to be suitable for estimating the concentrations of acetate, propionate and total volatile fatty acids (VFA) but the error of prediction was too large for accurate quantification. Both the mu-GC and NIRS were low maintenance methods whereas the MIMS required frequent cleaning and background measurements" |
| Keywords: | "Acetates/analysis Bacteria, Anaerobic/*metabolism *Biofuels Chromatography, Gas/*methods Cresols/analysis Fatty Acids, Volatile/analysis Hydrogen/analysis Mass Spectrometry/*methods Methane/*analysis Nitrogen/analysis Oxygen/analysis Pilot Projects Propio;" |
| Notes: | "MedlineWard, Alastair James Bruni, Emiliano Lykkegaard, Morten K Feilberg, Anders Adamsen, Anders P S Jensen, Anders P Poulsen, Allan K eng Research Support, Non-U.S. Gov't England 2011/01/15 Bioresour Technol. 2011 Mar; 102(5):4098-103. doi: 10.1016/j.biortech.2010.12.052. Epub 2010 Dec 22" |
