Flexibility in wheat bioethanol plants
نویسنده
چکیده
Bioethanol is mostly produced from wheat starch in Sweden. Due to the increasing wheat price it is no longer profitable to produce bioethanol from wheat. In this paper the conditions for converting a wheat bioethanol plant to a lignocellulosic bioethanol plant are studied. The most suitable lignocellulosic feedstock is investigated and soft wood chips are chosen based on bioethanol yield, supply and price. The conversion is based on a wheat bioethanol plant with the annual production capacity of 150 000 m3 bioethanol. To be able to change feedstock lignocellulose specific equipment is required to handle the raw material and the by‐product, which are harder to process for the lignocellulosic feedstock. The profitability has been studied for two types of conversion. The first type is to alternate the equipment to keep the production capacity. The second type is to only invest in the lignocellulose specific equipment and alternate the production capacity to match the existing equipment. Due to the high investment cost for the lignocellulose specific equipment it’s only the conversion where the production capacity is kept that is profitable. An investment of 1 260 MSEK can achieve an annual profit of 40 MSEK.
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