Abstract
Oxidative lime pretreatment increases the enzymatic digestibility of lignocellulosic biomass primarily by removing lignin. In this study, recommended pretreatment conditions (reaction temperature, oxygen pressure, lime loading, and time) were determined for Dacotah switchgrass. Glucan and xylan overall hydrolysis yields (72 h, 15 FPU/g raw glucan) were measured for 105 different reaction conditions involving three different reactor configurations (very short term, short term, and long term). The short-term reactor was the most productive. At the recommended pretreatment condition (120 °C, 6.89 bar O2, 240 min), it achieved an overall glucan hydrolysis yield of 85.2 g glucan hydrolyzed/100 g raw glucan and an overall xylan yield of 50.1 g xylan hydrolyzed/100 g raw xylan. At this condition, glucan oligomers (1.80 g glucan recovered/100 g glucan in raw biomass) and xylan oligomers (25.20 g xylan recovered/100 g xylan in raw biomass) were recovered from the pretreatment liquor, which compensate for low pretreatment yields.
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References
Energy UDO. (2009). Annual energy review 2009 report no. DOE/EIA-0384 (2009). Washington: Energy Information Administration.
Yang, B., & Wyman, C. E. (2008). Pretreatment: the key to unlocking low-cost cellulosic ethanol. Biofuels, Bioproducts and Biorefining, 2, 26–40.
McLaughlin, S. B., de la Torre Ugarte, D. G., Garten, C. T., Lynd, L. R., Sanderson, M. A., Tolbert, V. R., et al. (2002). High-value renewable energy from prairie grasses. Environmental Science & Technology, 36, 2122–2129.
Hubbard, H. M. (1991). The real cost of energy. Scientific American; (United States), 264(4), 36–40. 42.
Schmer, M. R., Vogel, K. P., Mitchell, R. B., & Perrin, R. K. (2008). Net energy of cellulosic ethanol from switchgrass. Proceedings of the National Academy of Sciences, 105, 464–469.
Lee, J. (1997). Biological conversion of lignocellulosic biomass to ethanol. Journal of Biotechnology, 56, 1–24.
Saha, B. C., & Cotta, M. A. (2008). Lime pretreatment, enzymatic saccharification and fermentation of rice hulls to ethanol. Biomass and Bioenergy, 32, 971–977.
Rabelo, S., Filho, R., & Costa, A. (2009). Lime pretreatment of sugarcane bagasse for bioethanol production. Applied Biochemistry and Biotechnology, 153, 139–150.
Sun, Y., & Cheng, J. Y. (2002). Hydrolysis of lignocellulosic materials for ethanol production: a review. Bioresource Technology, 83, 1–11.
McMillan, J. (1994). In: Enzymatic conversion of biomass for fuels production: ACS symposium series (pp. 292–324). Washington: American Chemical Society.
Chang, V. S., & Holtzapple, M. T. (2000). Fundamental factors affecting biomass enzymatic reactivity. Applied Biochemistry and Biotechnology, 84-6, 5–37.
O’Dwyer, J. P., Zhu, L., Granda, C. B., & Holtzapple, M. T. (2007). Enzymatic hydrolysis of lime-pretreated corn stover and investigation of the HCH-1 Model: inhibition pattern, degree of inhibition, validity of simplified HCH-1 Model. Bioresource Technology, 98, 2969–2977.
Sierra, R., Smith, A., Granda, C., & Holtzapple, M. T. (2008). Producing fuels and chemicals from lignocellulosic biomass. Chemical Engineering Progress, 104, S10–S18.
Lee, Y. H., & Fan, L. T. (1982). Kinetic studies of enzymatic hydrolysis of insoluble cellulose: analysis of the initial rates. Biotechnology and Bioengineering, 24, 2383–2406.
Kong, F., Engler, C., & Soltes, E. (1992). Effects of cell-wall acetate, xylan backbone, and lignin on enzymatic hydrolysis of aspen wood. Applied Biochemistry and Biotechnology, 34–35, 23–35.
Holtzapple, M. T. and Davison, R. R. (1999). Methods of biomass pretreatment.
Mosier, N., Wyman, C., Dale, B., Elander, R., Lee, Y. Y., Holtzapple, M., et al. (2005). Features of promising technologies for pretreatment of lignocellulosic biomass. Bioresource Technology, 96, 673–686.
Wyman, C. E., Dale, B. E., Elander, R. T., Holtzapple, M., Ladisch, M. R., & Lee, Y. Y. (2005). Coordinated development of leading biomass pretreatment technologies. Bioresource Technology, 96, 1959–1966.
Wyman, C. E., Dale, B. E., Elander, R. T., Holtzapple, M., Ladisch, M. R., & Lee, Y. Y. (2005). Comparative sugar recovery data from laboratory scale application of leading pretreatment technologies to corn stover. Bioresource Technology, 96, 2026–2032.
Wyman, C. E., Dale, B. E., Elander, R. T., Holtzapple, M., Ladisch, M. R., Lee, Y. Y., et al. (2009). Comparative sugar recovery and fermentation data following pretreatment of poplar wood by leading technologies. Biotechnology Progress, 25, 333–339.
Schmer, M. R., Vogel, K. P., Mitchell, R. B., Moser, L. E., Eskridge, K. M., & Perrin, R. K. (2006). Establishment stand thresholds for switchgrass grown as a bioenergy crop. Crop Science, 46, 157–161.
Wright, L., & Turhollow, A. (2010). Switchgrass selection as a “model” bioenergy crop: a history of the process. Biomass and Bioenergy, 34, 851–868.
Walsh, M., de la Torre Ugarte, D., Shapouri, H., & Slinsky, S. (2003). Bioenergy crop production in the United States: potential quantities, land use changes, and economic impacts on the agricultural sector. Environmental & Resource Economics, 24, 313–333.
Chang, V. S., Nagwani, M., & Holtzapple, M. T. (1998). Lime pretreatment of crop residues bagasse and wheat straw. Applied Biochemistry and Biotechnology, 74, 135–159.
Kaar, W. E., & Holtzapple, M. T. (2000). Using lime pretreatment to facilitate the enzymic hydrolysis of corn stover. Biomass and Bioenergy, 18, 189–199.
Sierra, R., Granda, C., & Holtzapple, M. T. (2009). Short-term lime pretreatment of poplar wood. Biotechnology Progress, 25, 323–332.
Sluiter, A., Hames, B., Ruiz, R., Scarlata, C., Sluiter, J., Templeton, D., et al. (2008). Determination of structural carbohydrates and lignin in biomass. National Renewable Energy Laboratory analytical procedure. Golden: National Renewable Energy Laboratory.
Selig, M., Weiss, N., & Ji, Y. (2008). Enzymatic saccharification of lignocellulosic biomass. National Renewable Energy Laboratory analytical procedure. Golden: National Renewable Energy Laboratory.
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This work was supported by the US Department of Energy, contract number DE-FG36-07GO17102.
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Falls, M., Sierra-Ramirez, R. & Holtzapple, M.T. Oxidative Lime Pretreatment of Dacotah Switchgrass. Appl Biochem Biotechnol 165, 243–259 (2011). https://doi.org/10.1007/s12010-011-9247-6
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DOI: https://doi.org/10.1007/s12010-011-9247-6