HR: 0800h
AN: B41B-0461    [Abstracts]
TI: Global and Regional Potential for Biofuels From Residue and Waste
AU: * Gregg, J S
EM: jgregg@umd.edu
AF: Department of Geography, University of Maryland, 2181 LeFrak Hall, College Park, MD 20742, United States
AU: * Gregg, J S
EM: jgregg@umd.edu
AF: Joint Global Change Research Institute, 8400 Baltimore Avenue, Suite 201, College Park, MD 20740, United States
AU: Smith, S J
EM: ssmith@pnl.gov
AF: Joint Global Change Research Institute, 8400 Baltimore Avenue, Suite 201, College Park, MD 20740, United States
AB: As co-products, agricultural and forestry residues as well as municipal solid waste (MSW) represent potential low cost lignocellulosic biomass feedstocks for the production of second generation biofuels. For agriculture, the maximum supply is a function of crop-specific attributes (harvest index and energy content of residue) and total crop production (yield and total harvested area). For forestry, two potential residue streams are considered: residue left from timber harvesting (tree tops and branches), and residue from mills (wood scraps and sawdust). The harvest index, milling efficiencies, and energy content of wood are used to estimate the total potential supply of forestry residues. MSW is predicted as a function of GDP and the proportional waste composition indicative of various regions. Limiting factors for supply of biomass feedstock from these sources include agricultural and forest productivity, residue required to prevent soil erosion and maintain soil nutrients, and cost of aggregation and transport. Using the ObjECTS MiniCAM Integrated Assessment Model, the global role of residue biomass as a feedstock for biofuels is modeled for the next century under different climate policy scenarios.
DE: 0402 Agricultural systems
DE: 0414 Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912)
DE: 0428 Carbon cycling (4806)
DE: 0429 Climate dynamics (1620)
DE: 6349 General or miscellaneous
SC: Biogeosciences [B]
MN: 2007 Fall Meeting