Bioethanol,biohydrogen and biogas production from wheat straw in a biorefinery concept |
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| Authors: | Prasad Kaparaju María Serrano Anne Belinda Thomsen Prawit Kongjan Irini Angelidaki |
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| Affiliation: | 1. Department of Environmental Engineering, Technical University of Denmark, Building 115, DK-2800 Kgs. Lyngby, Denmark;2. Biosystems Department, RISØ-DTU, Building 301, DK-4000, Roskilde, Denmark;1. State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. NUS Environment Research Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Singapore;4. Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;1. School of Bioscience and Bioengineering, South China University of Technology, Guangzhou Higher Education Mega Center, Panyu, Guangzhou 510006, People’s Republic of China;2. Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou 510006, People’s Republic of China;3. Guangzhou Sugarcane Industry Research Institute, Guangzhou 510316, People’s Republic of China;1. Department of Biochemistry & Molecular Biology, Michigan State University, 603 Wilson Road, East Lansing, MI 48824, USA;2. Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science and Technology, Tianjin 300457, China;3. Key Lab of Pulp & Paper Science and Technology of Education Ministry of China, Qilu University of Technology, Jinan 250353, China;1. Advanced Technology Development Center, Indian Institute of Technology Kharagpur, 721302, India;2. Department of Biotechnology, Indian Institute of Technology Kharagpur, 721302, India |
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| Abstract: | The production of bioethanol, biohydrogen and biogas from wheat straw was investigated within a biorefinery framework. Initially, wheat straw was hydrothermally liberated to a cellulose rich fiber fraction and a hemicellulose rich liquid fraction (hydrolysate). Enzymatic hydrolysis and subsequent fermentation of cellulose yielded 0.41 g-ethanol/g-glucose, while dark fermentation of hydrolysate produced 178.0 ml-H2/g-sugars. The effluents from both bioethanol and biohydrogen processes were further used to produce methane with the yields of 0.324 and 0.381 m3/kg volatile solids (VS)added, respectively. Additionally, evaluation of six different wheat straw-to-biofuel production scenaria showed that either use of wheat straw for biogas production or multi-fuel production were the energetically most efficient processes compared to production of mono-fuel such as bioethanol when fermenting C6 sugars alone. Thus, multiple biofuels production from wheat straw can increase the efficiency for material and energy and can presumably be more economical process for biomass utilization. |
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