The overall objective in this European Union-project is to develop cost and energy effective production systems for coproduction of bioethanol and electricity based on integrated biomass utilization. A pilot plan reactor for hydrothermal pretreatment (including weak acid hydrolysis, wet oxidation, and steam pretreatment) with a capacity of 100 kg/h was constructed and tested for pretreatment of wheat straw for ethanol production. Highest hemicellulose (C5 sugar) recovery and extraction of hemicellulose sugars was obtained at 190 degrees C whereas highest C6 sugar yield was obtained at 200 degrees C. Lowest toxicity of hydrolysates was observed at 190 degrees C; however, addition of H2O2 improved the fermentability and sugar recoveries at the higher temperatures. The estimated total ethanol production was 223 kg/t straw assuming utilisation of both C6 and C5 during fermentation, and 0.5 g ethanol/g sugar.
CITATION STYLE
Thomsen, M. H., Thygesen, A., Jørgensen, H., Larsen, J., Christensen, B. H., & Thomsen, A. B. (2007). Preliminary Results on Optimization of Pilot Scale Pretreatment of Wheat Straw Used in Coproduction of Bioethanol and Electricity. In Twenty-Seventh Symposium on Biotechnology for Fuels and Chemicals (pp. 448–460). Humana Press. https://doi.org/10.1007/978-1-59745-268-7_37
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