WO2005118828-A1  MCMILLAN JD ET AL: 'Simultaneous saccharification and cofermentation of dilute-acid pretreated yellow poplar hardwood to ethanol using xylose-fermenting Zymomonas mobilis.' APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY. vol. 77-79, 1999, pages 649 - 665;  MCMILLAN JD ET AL: 'Simultaneous saccharification and cofermentation of dilute-acid pretreated yellow poplar hardwood to ethanol using xylose-fermenting Zymomonas mobilis.' APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY. vol. 77-79, 1999, pages 649 - 665, XP008067363;  WU Z ET AL: 'Nonisothermal simultaneous saccharification and fermentation for direct conversion of lignocellulosic biomass to ethanol.' APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY. vol. 70-72, 1998, pages 479 - 492;  WU Z ET AL: 'Nonisothermal simultaneous saccharification and fermentation for direct conversion of lignocellulosic biomass to ethanol.' APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY. vol. 70-72, 1998, pages 479 - 492, XP008067391;  DORAN JB ET AL: 'Saccharification and fermentation of sugar cane bagasse by Klebsuella oxytoca P2 containing chromosomally integrated genes encoding the Zymomonas mobilis ethanol pathway.' BIOTECHNOLOGY AND BIOENGINEERING . vol. 44, 1994, pages 240 - 247;  DORAN JB ET AL: 'Saccharification and fermentation of sugar cane bagasse by Klebsuella oxytoca P2 containing chromosomally integrated genes encoding the Zymomonas mobilis ethanol pathway.' BIOTECHNOLOGY AND BIOENGINEERING . vol. 44, no. 2, 1994, pages 240 - 247, XP008092303;  OLSSON L ET AL: 'Fermentation of lignocellulosic hydrolysates for ethanol production.' ENZYME AND MICROBIAL TECHNOLOGY. vol. 18, April 1996, pages 312 - 331;  OLSSON L ET AL: 'Fermentation of lignocellulosic hydrolysates for ethanol production.' ENZYME AND MICROBIAL TECHNOLOGY. vol. 18, April 1996, pages 312 - 331, XP002312595;  SODERSTROM J ET AL: 'Effect of washing on yield in one-and two-step steam pretreatment of softwood for production of ethanol.' BIOTECHNOLOGY PROGRESS. vol. 20, no. 3, 2004, pages 744 - 749;  SODERSTROM J ET AL: 'Effect of washing on yield in one-and two-step steam pretreatment of softwood for production of ethanol.' BIOTECHNOLOGY PROGRESS. vol. 20, no. 3, 2004, pages 744 - 749, XP008092304;  STENBERG K ET AL: 'The influence of lactic acid formation on the simultaneous saccharification and fermentation (SSF) of softwood to ethanol.' ENZYME AND MICROBIAL TECHNOLOGY. vol. 26, 2000, pages 71 - 79;  STENBERG K ET AL: 'The influence of lactic acid formation on the simultaneous saccharification and fermentation (SSF) of softwood to ethanol.' ENZYME AND MICROBIAL TECHNOLOGY. vol. 26, 2000, pages 71 - 79, XP008092659;  See also references of EP 1751296A1EP1751296-B1  DORAN JB ET AL: 'Saccharification and fermentation of sugar cane bagasse by Klebsuella oxytoca P2 containing chromosomally integrated genes encoding the Zymomonas mobilis ethanol pathway.' BIOTECHNOLOGY AND BIOENGINEERING . vol. 44, no. 2, 1994, pages 240 - 247, XP008092303;  MCMILLAN JD ET AL: 'Simultaneous saccharification and cofermentation of dilute-acid pretreated yellow poplar hardwood to ethanol using xylose-fermenting Zymomonas mobilis.' APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY. vol. 77-79, 1999, pages 649 - 665, XP008067363;  OLSSON L ET AL: 'Fermentation of lignocellulosic hydrolysates for ethanol production.' ENZYME AND MICROBIAL TECHNOLOGY. vol. 18, April 1996, pages 312 - 331, XP002312595;  SODERSTROM J ET AL: 'Effect of washing on yield in one-and two-step steam pretreatment of softwood for production of ethanol.' BIOTECHNOLOGY PROGRESS. vol. 20, no. 3, 2004, pages 744 - 749, XP008092304;  STENBERG K ET AL: 'The influence of lactic acid formation on the simultaneous saccharification and fermentation (SSF) of softwood to ethanol.' ENZYME AND MICROBIAL TECHNOLOGY. vol. 26, 2000, pages 71 - 79, XP008092659;  WU Z ET AL: 'Nonisothermal simultaneous saccharification and fermentation for direct conversion of lignocellulosic biomass to ethanol.' APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY. vol. 70-72, 1998, pages 479 - 492, XP008067391US7754456-B2  Doran, J.B. et al., "Saccharification and fermentation of sugar cane bargasse by Klebsiella oxytoca P2 Containing chromosomally integrated genes encoding the Zymomonas mobilis ethanol pathway", Biotechnology and Bioengineering, 1994, p. 240-247, vol. 44.;  Stenberg, K. et al., "The influence of lactic acid formation on the simultaneous saccharification and Fermentation (SSF) of softwood to ethanol", Enzyme and Microbial Technology, 2000, p. 71-79, vol. 26.;  Soederstroem, J. et al., "Effect of washing on yield in one-and two step steam pretreatment of softwood For production of ethanol.", Biotechnology Progress, 2004, p. 744-749, vol. 20, No. 3.;  Ollson, L. et al., "Fermentation of lignocellulosic hydrolysates for ethanol production.", Enzyme and Microbial Technology, Apr. 1996, p. 312-331, vol. 18.;  McMillan, J.D. et al., "Simultaneous saccharification and cofermentation of dilute-acid pretreated Yellow poplar hardwood to ethanol using xylose-fermenting Zymomonas mobilis.", Applied Biotechnology, 1999, p. 649-665, vol. 77-79.;  Wu, Z. et al., "Nonisothermal simultaneous saccharification and fermentation for direct conversion of Lignocellulosic biomass to ethanol.", Applied Biochemistry and Biotechnology, 1998, p. 479-492, vol. 70-72.;  Vincent S. Chang, et al.; "Fundamental Factors Affecting Biomass Enzymatic Reactivity", Applied Biochemistry and Biotechnology, vol. 84-86, 2000, p. 5-37.;  Teh-An Hsu; "Pretreatment of Biomass", Handbook on Bioethanol: Production and Utilization, Ed. C. E. Wyman, Chapter 10, p. 179-212 (1996).;  Priya Chandrakant, et al.; "Simultaneous Bioconversion of Cellulose and Hemicellulose to Ethanol", Critical Reviews in Biotechnology, 18(4): p. 295-331 (1998).;  C. S. Gong et al.; "Ethanol Production from Renewable Resources", Advances in Biochemical Engineering/Biotechnology, 1999, vol. 65, p. 207-241.;  Michael Kaylen, et al.; "Economic feasibility of producing ethanol from lignocellulosic feedstocks", Bioresource Technology 72 (2000), p. 19-32.;  Kerstin Steinberg, et al.; "Effect of Substrate and Cellulase Concentration on Simultaneous Saccharification and Fermentation of Steam-Pretreated Softwood for Ethanol Production", Biotechnology and Bioengineering, vol. 68, No. 2, Apr. 20, 2000, p. 204-210.;  Eva Palmgvist, et al.; "Design and Operation of a Bench-Scale Process Development Unit for the Production of Ethanol From Lignocellulosics", Bioresource Technology 58 (1996), p. 171-179.;  J. Saddler, et al.; "Steam pre-treatment of lignocellulosic residues", Forest Products Biotechnology, Faculty of Forestry. University of British Columbia, Vancouver, Canada. Chapter 3, p. 73-91 (1993).;  T. Teeri; "Crystalline cellulose degradation: new insight into the function of cellobiohydrolases", May 1997, vol. 15, p. 160-167.