Korea Research Institute of Chemical Technology

Chan Duck Jung

Bong Keun Song

Kyung Sik Hong

In Yong Eom

Ju Hyun Yu

Seung Hwan Lee

In-Chul Kim

Jong Geon Jegal

The present invention relates to a method for preparing bioethanol from lignocellulosic biomass. The method of the present invention is capable of: minimizing the impurity content of an enzymatic saccharification raw material, by extracting biomass using hot water, before pretreatment, and removing extractable substances such as inorganic salts; suppressing, to the greatest extent, the production of overdecomposition products of sugar, by pretreating the biomass, from which the hot water extractable substances have been removed, in a condition for maximizing xylan yield; preparing fermentable sugar at a low cost, without washing a pretreated solid obtained from subsequent solid-liquid separation, but by only concentrating a sugar solution obtained after enzymatic saccharification, using a separation film; and preparing bioethanol therefrom in high yield.

Method for preparing sugar, bioethanol or microbial metabolite from lignocellulosic biomass

The present invention relates to a method for preparing, from wood-based biomass, a high concentration of fermentable sugar which can be effectively used in culturing various industrial fermented bacteria. According to the method of the present invention, biomass can be extracted by hot water prior to a pre-treatment so as to remove extractible substances such as mineral salts to thus minimize the content of impurities in raw materials for an enzymatic saccharification. The biomass from which substances extractible by hot water are removed is pre-treated in the condition where xylan yield rate is maximized, thus achieving maximum inhibition of the generation of over-decomposed products of sugar. Subsequently, fermentable sugar for culturing various industrial fermented bacteria can be prepared in an inexpensive manner by only concentrating, using a separator membrane, the sugar solution obtained by an enzymatic saccharification of the pre-treated solid content obtained by a solid-liquid separation without washing the solid content with water.

Method for preparing fermentable sugar from wood-based biomass

Disclosed is a treatment method of biomass to maximize sugar yield, which uses a specific additive which can effectively adsorb lignin-derived compounds and various inhibitors of the enzymatic activity to promote saccharification of cellulose catalyzed by cellulose hydrolases, and thus can maximize sugar yield from pretreated biomass.

Treatment method for biomass to maximize sugar yield, and additive used in same

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Daejeon, South Korea

Chan Duck Jung