Alkali Pretreatment for Producing Bioethanol Fuel from Lignocellulosics Part 2:-Bioethanol Production from Waste and Recycled Materials-

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Our group has proposed producing bioethanol from lignocellulosics using alkali pretreatment and enzymatic saccharification. Our previous studies showed that low-cost materials must be used to reduce the production cost. In this study, we evaluated the suitability of low-cost lignocellulosics, such as waste and recycled lignocellulosics, for bioethanol production.<BR>Sugi branches without debarking yielded a little lower glucose than sugi. However, it was suggested that sugi branches have sufficient potential as low-cost lignocellulosics for bioethanol production. Alkali pretreatment removed most of the phenol resin which was included in plywood, so enzymatic saccharification of plywood pulp proceeded smoothly, and the glucose yield of plywood was similar to that of sugi. A large amount of screen knots was produced after alkali pretreatment of particle board which contained melamine-urea resin, and small resin particles remained in the pulp hindered enzymatic saccharification. As a result, the glucose yield of particle board was less than half that of sugi. Medium density fiberboard (MDF) which contained urea resin gave a high pulp yield after alkali pretreatment. However, only a small amount of MDF pulp was saccharified after enzymatic saccharification, and the glucose yield of MDF was only about 10%. A large proportion of sugi leaf was dissolved by alkali pretreatment, so the pulp yield of sugi leaf was very low. Furthermore, only a limited part of sugi leaf pulp was saccharified, and the glucose yield of sugi leaf was only 2.8%. These results indicate that sugi leaf is not a good lignocellulosic for bioethanol production.
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杉元倫子
(独)国際農林水産業研究センター林業領域

Alkali Pretreatment for Producing Bioethanol Fuel from Lignocellulosics Part 2:-Bioethanol Production from Waste and Recycled Materials-

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