Comparison of enzymatic hydrolysis characteristics of mushroom culutured waste (MCW) and Cork oak by alkali treatment

ABSTRACT The mushroom cultured waste(MCW) from cork oak was evaluated as the raw material for bioethanol production. For enzymatic hydrolysis, cellulase cocktails (Celluclast 1.5L and Novozym 188) was used for polysaccharides to monosaccharides conversion. Compared with sound cork oak woodmeal, wood-meal from MCW showed higher cellulose to glucose conversion. To improve polysaccharides to mono-saccharides conversion, pretreatment by sodium hydroxide was applied. Even though more xylan and lignin were removed in woodmeal of MCW than that of cork oak, concentration of glucose was higher from sodium hydroxide treated cork oak woodmeal (51.3 g/L) than treated MCW woodmeal (41.6 g/L). Keywords : Sodium hydroxide, pretreatment, enzymatic hydrolysis, mushroom cultured waste, Cork oak 1. 서 론 폐골목은 식용 버섯을 생산하는 과정에서 버섯 생산량의 저하로 인하여 골목이 폐기될 때 발생한다. 발생된 폐골목은 2011년도 기준으로 화목(36.8%), 유기질 비료(23.6%), 축사용 깔개(7.1%) 등으로 사용되었다. 그러나 26%에 달하는 폐골목은 특별한 용도가 없이 방치되고 있으며 효과적인 목질 바이오매스 자원의 활용을 위하여 폐골목의 용도 개발이 필요하다.