• 1 Institute for a Secure and Sustainable Environment, Department of Civil and Environmental Engineering, The University of Tennessee, Knoxville, TN 37996, U.S.A.;
    2 Center of Environmental Biotechnology, Department of Microbiology, The University of Tennessee, Knoxville, TN 37996, U.S.A.;
    3 Institute for a Secure and Sustainable Environment, Center of Environmental Biotechnology, Department of Biosystems Engineering and Soil Science, The University of Tennessee, Knoxville, TN 37996, U.S.A.

Received date: 2010-05-18

  Revised date: 2010-06-07

  Online published: 2010-06-30


Biomass is an abundant, domestically available source of clean energy that has the potential to greatly reduce greenhouse gas emissions. Production of biofuels from cellulosic biomass is attractive because of its low fossil energy-to-carbon ratio compared to corn and other grain-based technologies. However, biofuel production systems are not simple. They are subject to multiple factors: energy supply, economic development in rural communities, land and ecosystem protection, potential for reduction of greenhouse gas emission, and social training. This paper provides a brief overview of the environmental and economic impacts of bioenergy development. Different regions should have their own optimized portfolio of biomass species or energy crops according to regional climate and ecological conditions. Near-future biotechnology challenges include understanding and manipulation of biomass formation and breakdown of cell wall, biomass pretreatment and selection of plant variants with improved sugar yields, and high throughput characterization and selection of enzymes and microbes for cellulose deconstruction. Life-cycle assessment and development of sustainable criteria and indicators are addressed in addition to the emphasis of the importance of environmental security and public health associated with bioenergy development.

Cite this article

Randall W.Gentry, Gary S.Sayler, ZHUANG Jie . TowardsSustainableCellulosicBioenergy[J]. Journal of Resources and Ecology, 2010 , 1(2) : 117 -122 . DOI: 10.3969/j.issn.1674-764x.2010.02.003


Adler P R, S J Del Grosso, and W J Parton. 2007. Life-cycle assessment of net greenhouse gas flux for bioenergy cropping systems. Ecol. Application, 17:675–691.

Arantes V and J N Saddler. 2010. Access to cellulose limits the efficiency of enzymatic hydrolysis: the role of amorphogenesis. Biotechnology for Biofuels, 3:4.

Boateng A A, P J Weimer, H G Jung and J F S Lamb. 2008. Response of thermochemical and biochemical conversion processes to lignin concentration in alfalfa stems. Energy & Fuels, 22:2810–2815.

Biomass Research and Development Board. 2008. National Biofuels Action Plan. Washington D.C., USA, October 2008.

De La Torre Ugarte D G, M E Walsh, H Shapouri and S P Slinsky. 2003. The economic impacts of bioenergy crop production on U. S. agriculture. U. S. Department of Agriculture. Office of Energy Policy and New Uses. Ag. Econ. Report. No. 816, 41 p.

Gnansounou E, A Dauriat, J Villegas and L Panichelli. 2009. Life cycle assessment of biofuels: Energy and greenhouse gas balances. Bioresource Technol., 100:4919–4930.

International Energy Agency (IEA). 2010. Sustainable production of second -generation biofuels. Paris, France. February.

Kalogo Y, S Habibi, H Maclean and S Joshi. 2007. Environmental implications of municipal solid waste-derived ethanol. Environ. Sci. Technol., 41(1):35–41.

Lynd L R, W H van Zyl, J E McBride and M Laser. 2005. Consolidated bioprocessing of cellulosic biomass: an update. Curr. Opin. Biotechnol., 16:577–583.

Mu D, T Seagerb, Rao P S and Zhao F. 2010. Lignocellulosic ethanol production: biochemical vs. thermochemical conversion. Environ. Management, in press.

Sandia National Laboratory. 2009.  90-billion gallon biofuel deployment study. February.

Sannigrahi P, A J Ragauskas and G A Tuskan. 2010. Poplar as a feedstock for biofuels: A review of compositional characteristics. Biofuels, Bioproducts and Biorefining, 4 (2):209 –226.

Spatari S, Zhang Y and H Maclean. 2005. Life cycle assessment of switchgrass- and corn stover-derived ethanol-fueled automobiles. Environ. Sci. Technol., 39(24): 9750–9758.

Suh S, M Lenzen, G J Treloar, et al. 2004. System boundary selection in life-cycle inventories using hybrid approaches. Environ. Sci. Technol., 38(3):657–664.

Tuskan G A, et al. 2006. The genome of black cottonwood, Populus trichocarpa (Torr. & Gray). Science, 313(5793):1596 –1604.

U.S. Department of Energy (U.S. DOE). 2006. Biofuel initiative needs requirement documents. Washington D.C., USA, November.

Williams P D, D Inman, A Aden and G A Heath. 2009. Environmental and sustainability factors associated with next-generation biofuels in the U.S.: What do we really know? Environ. Sci. Technol., 43 (13):4763–4776.

Wu M, Wu Y and Wang M. 2006. Energy and emission benefits of alternative transportation liquid fuels derived from switchgrass: a fuel life cycle assessment. Biotechnology Progress, 22 (4):1012–1024.

Zhuang J, Yu G R, R W Gentry, G S Sayler, J W Bickham,  Ouyang Z Y, Wang R S, J Volenec, Wang Q J, Gu A, V H Dale, J B Drake and  M C MacCracken. 2010. Climate-energy nexus: beyond current technology and policy. Environ. Sci. Technol., in review.