Journal of the Japan Institute of Energy
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ONLINE ISSN: 1882-6121
PRINT ISSN: 0916-8753

Journal of the Japan Institute of Energy Vol. 92 (2013), No. 5

  • Economic and Environmental Benefits of the Use of Multiple Feedstocks for Bioethanol Production in Thailand

    pp. 491-502

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    DOI:10.3775/jie.92.491

    Ethanol production using multiple feedstocks has the potential to be an important option for the development of ethanol industry in Thailand. In the present study, two types of plants that produce ethanol from both cassava and molasses (multi-feedstock plant) were evaluated with respect to profitability and greenhouse gas (GHG) emissions and compared with the performance of one type of plant that produce ethanol from cassava only (single-feedstock plant). The results show that multi-feedstock plants have lower GHG emissions than a single-feedstock plant. Despite environmental benefits, multi-feedstock plants have no advantage in terms of profitability. However, the use of multiple feedstocks is more effective for avoiding the risk of feedstock price fluctuation and ensuring the economic viability of ethanol production. In addition, scenario analysis was carried out to explore the effective use of the biogas collected from wastewater treatment process. The analysis suggests that when the biogas is used for electricity generation, profitability of all plants is significantly improved compared with when it is used for steam generation. Although the biogas utilization for electricity generation has a negative impact on the environmental performance, it is an appealing option from a cost perspective.
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