Utilization of semi‐natural grassland through integrated generation of solid fuel and biogas from biomass. II. Effects of hydrothermal conditioning and mechanical dehydration on anaerobic digestion of press fluids

Grass and Forage Science - Tập 64 Số 4 - Trang 354-363 - 2009
F. Richter1, Rüdiger Graß1, Thomas Fricke1, W. Zerr2, M. Wachendorf1
1Department of Grassland Science and Renewable Plant Resources, University of Kassel, 37213 Witzenhausen, Germany
2Landesbetrieb Hessisches Landeslabor (LHL), Landwirtschaftszentrum Eichhof, Schloss Eichhof, 36251 Bad Hersfeld, Germany

Tóm tắt

AbstractA procedure (Integrated Generation of Solid Fuel and Biogas from Biomass, IFBB) was developed which uses a screw press to separate the readily digestible constituents of mature grassland biomass into a press fluid for conversion into biogas and a fibrous press cake for processing into a solid fuel. Effects of mechanical dehydration and prior hydrothermal conditioning at different temperatures (5, 60 and 80°C) on concentrations of organic compounds in the press fluid and on methane production in batch experiments were evaluated for five semi‐natural grasslands typical of mountain areas of Germany. Results show that the crude protein concentration of the press fluids was higher and crude fibre concentration was lower than that of the parent material (herbage conserved as silage). Digestion tests in batch fermenters showed that the methane yield of the press fluids was double [397–426 normal litre (NL) kg−1 volatile solids (VS) after 13 d] that of the whole‐crop grassland silage (218 NL kg−1 VS after 27 d) but no consistent effect of higher temperature during conditioning was observed. Within 13 d of fermentation the decomposition of the organic matter (OM) that occurred in the press fluids was 0·90, whereas after 27 d of fermentation more than 0·40 of the OM remained undigested in the whole‐crop silage, pointing at a marked reduction in retention time for anaerobic digestion of press fluids in continuous systems. Press fluids produced 0·90 of the maximum methane yield after 4 to 7 d compared with 19 days for the whole‐crop silage.

Từ khóa


Tài liệu tham khảo

10.1002/bbb.76

Amon T., 2004, Bericht über das 10. Alpenländische Expertenforum „Biogasproduktion – Alternative Biomassenutzung und Energiegewinnung in der Landwirtschaft”. BAL Gumpenstein, 18‐19.03.2004, 21

10.1016/j.agee.2006.05.007

10.1016/j.biortech.2006.07.007

Baserga U., 1998, FAT‐Berichte, 512: Landwirtschaftliche Co‐Vergärungs‐Biogasanlagen. Biogas aus organischen Reststoffen und Energiegras (FAT reports, 512: Agricultural co‐fermentation biogas plants. Biogas from organic wastes and energy grass)

BMU, 2008, Erneuerbare Energien in Zahlen – Nationale und internationale Entwicklung (Renewable energies in figures – national and international development)

10.1016/B978-0-08-021791-8.50019-6

Bühle L., 2007, Biogas aus pflanzlichen Presssäften – Alternative Energiequelle aus Hessen? Gaserträge und Fermenterdynamik beim anaeroben Abbau von Presssäften (Biogas from herbal press fluids – alternative energy source from Hesse? Gas yields and fermenter dynamics during anaerobic digestion of press fluids), UWSF – Zeitschrift für Umweltchemie und Ökotoxikologie, 19, 63

10.1021/ie50507a033

Edelmann W., 2001, Energie aus Biomasse: Grundlagen, Techniken und Verfahren, 641

10.3168/jds.S0022-0302(53)91501-X

FNR, 2005, Ergebnisse des Biogasmessprogramms (Results of the biogas measuring programme)

FNR, 2006, Handreichung Biogasgewinnung und‐nutzung (Manual biogas production and utilization)

Graß R., 2009, Die integrierte Biogas‐ und Festbrennstofferzeugung aus Ganzpflanzensilagen. (The integrated production of biogas and solid fuel from whole‐crop silages), Berichte über Landwirtschaft, 87, 43

Gronauer A., 2003, Wissenschaftliche Begleitung einer Pilotanlage zur Feststoffvergärung von landwirtschaftlichen Gütern. (Scientific support of a pilot plant for the solid anaerobic digestion of agricultural goods)

Hartmann H., 2001, Energie aus Biomasse: Grundlagen, Techniken und Verfahren, 248

10.1016/S0961-9534(02)00191-5

Jungk N.C., 2000, Bioenergy for Europe: which one fits best? – a comparative analysis for the community. Final report

10.1038/nbt0984-805

10.1016/S0959-6526(01)00066-X

Kromus S., 2000, Berichte aus Energie‐ und Umweltforschung, 18: Grüne Bioraffinerie – Integrierte Grasnutzung als Eckstein einer nachhaltigen Kulturlandschaftsnutzung (Reports of energy and environmental research, 18: green biorefinery ‐ integrated grass utilization as cornerstone of a sustainable land use)

Leible L., 2008, Ökologische und ökonomische Bewertung nachwachsender Energieträger, 45

Lemmer A., 2001, Co‐fermentation of grass and forage maize, Landtechnik, 56, 412

10.1016/S0304-3894(02)00320-5

Oechsner H., 2003, Feldfrüchte als Gärsubstrat in Biogasanlagen. (Field crops as fermentation substrate in biogas plants), Landtechnik, 58, 146

Prochnow A., 2005, Agricultural Engineering International: the CIGR E‐journal, Vol. VII, Manuscript EE 05 011

10.1016/S1364-0321(99)00014-3

Reulein J., 2007, Proceedings of the 15th European Biomass Conference & Exhibition, Berlin, Germany, 2007, 1770

10.1016/0167-8809(94)90053-1

10.1002/(SICI)1097-4660(199905)74:5<445::AID-JCTB65>3.0.CO;2-0

SAS Institute, 1996, SAS/STAT User’s Guide, Release 6.12

10.1016/0273-1223(96)00118-7

Schumacher B., 2007, Thermo‐mechanical pre‐treatment of ripe triticale for biogas production, Landtechnik, 62, 162

Shin H.‐S., 2003, Inhibitory effects of long‐chain fatty acids on VFA degradation and β‐oxidation, Water Science and Technology, 47, 139, 10.2166/wst.2003.0559

Thrän D., 2006, Sustainable strategies for biomass use in the European context

University of Hohenheim, 1997, DLG‐Futterwerttabellen Wiederkäuer (DLG nutrition value tables for ruminants)

10.2527/jas1967.261119x

VDI 4630, 2004, Vergärung organischer Stoffe (Fermentation of organic materials)

Vetter A., 2005, Proceedings of the 2. Bioenergietag, Leipzig, Germany, 2005, 7

10.1111/j.1365-2494.2009.00677.x

10.1065/uwsf2006.03.117

Thông tin
Thông tin xuất bản

Grass and Forage Science

Tập 64 Số 4

354-363

Thông tin tác giả