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Srinivasan R, Srinivasan B, Iqbal MU, Nemet A, Kravanja Z. Recent developments towards enhancing process safety: Inherent safety and cognitive engineering. Comput Chem Eng 2019. [DOI: 10.1016/j.compchemeng.2019.05.034] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Flores-Gómez CA, Escamilla Silva EM, Zhong C, Dale BE, da Costa Sousa L, Balan V. Conversion of lignocellulosic agave residues into liquid biofuels using an AFEX™-based biorefinery. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:7. [PMID: 29371883 PMCID: PMC5769373 DOI: 10.1186/s13068-017-0995-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 12/08/2017] [Indexed: 05/22/2023]
Abstract
BACKGROUND Agave-based alcoholic beverage companies generate thousands of tons of solid residues per year in Mexico. These agave residues might be used for biofuel production due to their abundance and favorable sustainability characteristics. In this work, agave leaf and bagasse residues from species Agave tequilana and Agave salmiana were subjected to pretreatment using the ammonia fiber expansion (AFEX) process. The pretreatment conditions were optimized using a response surface design methodology. We also identified commercial enzyme mixtures that maximize sugar yields for AFEX-pretreated agave bagasse and leaf matter, at ~ 6% glucan (w/w) loading enzymatic hydrolysis. Finally, the pretreated agave hydrolysates (at a total solids loading of ~ 20%) were used for ethanol fermentation using the glucose- and xylose-consuming strain Saccharomyces cerevisiae 424A (LNH-ST), to determine ethanol yields at industrially relevant conditions. RESULTS Low-severity AFEX pretreatment conditions are required (100-120 °C) to enable efficient enzymatic deconstruction of the agave cell wall. These studies showed that AFEX-pretreated A. tequilana bagasse, A. tequilana leaf fiber, and A. salmiana bagasse gave ~ 85% sugar conversion during enzyme hydrolysis and over 90% metabolic yields of ethanol during fermentation without any washing step or nutrient supplementation. On the other hand, although lignocellulosic A. salmiana leaf gave high sugar conversions, the hydrolysate could not be fermented at high solids loadings, apparently due to the presence of natural inhibitory compounds. CONCLUSIONS These results show that AFEX-pretreated agave residues can be effectively hydrolyzed at high solids loading using an optimized commercial enzyme cocktail (at 25 mg protein/g glucan) producing > 85% sugar conversions and over 40 g/L bioethanol titers. These results show that AFEX technology has considerable potential to convert lignocellulosic agave residues to bio-based fuels and chemicals in a biorefinery.
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Affiliation(s)
- Carlos A. Flores-Gómez
- Departament of Chemical Engineering, Tecnológico Nacional de México, I. T. Celaya, Av. Tecnológico S/N, 38010 Celaya, Guanajuato Mexico
- Department of Engineering, Tecnológico Nacional de México, I. T. Roque, Km 8 Carretera Celaya-J. Rosas, 38110 Celaya, Guanajuato Mexico
| | - Eleazar M. Escamilla Silva
- Departament of Chemical Engineering, Tecnológico Nacional de México, I. T. Celaya, Av. Tecnológico S/N, 38010 Celaya, Guanajuato Mexico
| | - Cheng Zhong
- Key Lab of Industrial Fermentation Microbiology of Ministry of Education, School of Biotechnology, Tianjin University of Science & Technology, Tianjin, People’s Republic of China
| | - Bruce E. Dale
- Department of Chemical Engineering and Materials Science, Michigan State University, 3815 Technology Boulevard, Lansing, MI 48910 USA
- DOE Great Lakes Bioenergy Center, Michigan State University, East Lansing, MI 48823 USA
| | - Leonardo da Costa Sousa
- Department of Chemical Engineering and Materials Science, Michigan State University, 3815 Technology Boulevard, Lansing, MI 48910 USA
- DOE Great Lakes Bioenergy Center, Michigan State University, East Lansing, MI 48823 USA
| | - Venkatesh Balan
- Department of Chemical Engineering and Materials Science, Michigan State University, 3815 Technology Boulevard, Lansing, MI 48910 USA
- DOE Great Lakes Bioenergy Center, Michigan State University, East Lansing, MI 48823 USA
- Biotechnology Division, Department of Engineering Technology, School of Technology, University of Houston, Houston, TX 77004 USA
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Kedron P, Bagchi-Sen S. Limits to policy-led innovation and industry development in US biofuels. TECHNOLOGY ANALYSIS & STRATEGIC MANAGEMENT 2016. [DOI: 10.1080/09537325.2016.1227066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Magyar M, Jin M, Sousa LDC, Aleid SM, Al-Hajhoj MR, Sudhakar B, Balan V. Empty Fruit Bunch from Date Palm Industries—A Sustainable Resource for Producing Biofuels and Industrial Solvents. Ind Biotechnol (New Rochelle N Y) 2016. [DOI: 10.1089/ind.2015.0036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Margaret Magyar
- Biomass Conversion Research Laboratory, Department of Chemical Engineering and Materials Science, Michigan State University, Lansing, MI
| | - Mingjie Jin
- Biomass Conversion Research Laboratory, Department of Chemical Engineering and Materials Science, Michigan State University, Lansing, MI
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Leonardo da Costa Sousa
- Biomass Conversion Research Laboratory, Department of Chemical Engineering and Materials Science, Michigan State University, Lansing, MI
| | - Salah Mohammed Aleid
- Date Palm Research Center of Excellence, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia
- Department of Food and Nutrition Science, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia
| | | | - Balakrishnan Sudhakar
- Date Palm Research Center of Excellence, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia
| | - Venkatesh Balan
- Biomass Conversion Research Laboratory, Department of Chemical Engineering and Materials Science, Michigan State University, Lansing, MI
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