Abstract
Corn stover, the most abundant agricultural residue in Hungary, is a potential raw material for the production of fuel ethanol as a result of its high content of carbohydrates, but a pretreatment is required for its efficient hydrolysis. In this article, we describe the results using various chemicals such as dilute H2SO4, HCl, and NaOH separately as well as consecutively under relative mild conditions (120°C, 1 h). Pretreatment with 5% H2SO4 or 5% HCl solubilized 85% of the hemicellulose fraction, but the enzymatic conversion of pretreated materials increased only two times compared to the untreated corn stover. Applying acidic pretreatment following a 1-d soaking in base achieved enzymatic conversion that was nearly the theoretical maximum (95.7%). Pretreatment with 10% NaOH decreased the lignin fraction >95%, increased the enzymatic conversion more than four times, and gave a 79.4% enzymatic conversion. However, by increasing the reaction time, the enzymatic degradability could also be increased significantly, using a less concentrated base. When the time of pretreatment was increased three times (0.5% NaOH at 120°C), the amount of total released sugars was 47.9 g from 100 g (dry matter) of untreated corn stover.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Stryer, L. (1988), Biochemistry, 3rd ed., W. H. Freeman & Co, NY, pp. 342–344.
Von Sivers, M. and Zacchi, G. (1996), Bioresour. Technol. 56, 131–140.
Wymann, C. E. (1994), Bioresour. Technol 50, 3–16.
Pintér, L. and Kléger, A., eds., (2000), Statistical Annual Reviews of the Hungarian Agriculture (1996–1999), Hungarian Central Statistical Office, Budapest.
Fan, L. T., Lee, Y., and Gharpuray, M. M. (1982), Biochem. Eng. 23, 157–187.
Coughlan, M. P. (1992), Bioresour. Technol. 39, 107–115.
Chang, M. M., Chou, T. Y. C., and Tsao, G. T. (1981), Biochem. Eng. 20, 15–42.
Lin, K. W., Ladish, M. R., Schaefer, D. M., Noller, C. H., Lechtenberg, V., and Tsao, G. T. (1981), AIChE Symp. 207(77), 102–106.
Koullas, D. P., Christakopoulos, P., Kekos, D., Macris, B. J., and Koukios, E. G. (1992), Biotechnol. Bioeng. 39 , 113–116.
Millet, M. A., Baker, A. J., and Satter, L. D. (1976), Biotechnol. Bioeng. Symp. 5, 125–153.
Ghosh, P. and Singh, A. (1993), Appl. Microbiol. 39, 295–333.
Moyson, E., De Semt, K., and Verachtert, H. (1991), Biodegradation of Wheat Straw by Higher Fungi, International Symposium on Environmental Biotechnology, ref. No. 000147, Biotechnology Technical Information Service, Bangkok, Thailand.
Han, Y. W. (1978), Appl. Microbiol. 23, 119–153.
Stenberg, K., Tengborg, C., Galbe, M., and Zacchi, G. (1998), J. Chem. Technol. Biotechnol. 71, 299–308.
Kaar, W. E., Gutierrez, C. V., and Kinoshita, C. M. (1998), Biomass Bioenergy 14, 277–287.
Holtzapple, M. T., Jun, J., Ashok, G., Patibandala, S. L., and Dale, B. E. (1991), Appi. Biochem. Biotechnol 28/29, 59–74.
Wilke, C. R., Yang, R. D., Sciamanna, A. F., and Freitas, R. P. (1981), Biotech. Bioeng. 23, 163–183.
Esteghlalian, A., Hashimoto, A. G., Fenske, J. J., and Penner, M. H. (1997), Bioresour. Technol. 59, 129–136.
MacDonald, D. G., Bakhshi, N. N., Mathews, J. F., Roychowdhury, A., Bajpai, P., and Moo-Young, M. (1983), Biotech. Bioeng. 25, 2067–2076.
Elshafei, A. M., Vega, J. L., Kalsson, K. T., Clausen, E. C., and Gaddy, J. L. (1991), Bioresour. Technol. 35, 73–80.
Kaar, W. E. and Holtzapple, M. T. (2000), Biomass and Bioenergy 18, 189–199.
Hägglund, E. (1951), in Chemistry of Wood, Hägglund, E., ed., Academic, NY, pp. 375–389.
Miller, G. L. (1959), Anal. Chem. 31, 420–428.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2002 Springer Science+Business Media New York
About this chapter
Cite this chapter
Varga, E., Szengyel, Z., Réczey, K. (2002). Chemical Pretreatments of Corn Stover for Enhancing Enzymatic Digestibility. In: Finkelstein, M., McMillan, J.D., Davison, B.H. (eds) Biotechnology for Fuels and Chemicals. Applied Biochemistry and Biotechnology. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-4612-0119-9_6
Download citation
DOI: https://doi.org/10.1007/978-1-4612-0119-9_6
Publisher Name: Humana Press, Totowa, NJ
Print ISBN: 978-1-4612-6621-1
Online ISBN: 978-1-4612-0119-9
eBook Packages: Springer Book Archive