碱法浆里残留的木素对纤维素酶水解的影响(英文)

EFFECT OF RESIDUAL LIGNIN IN ALKALI PULPS ON ENZYMATIC HYDROLYSIS OF CELLULOSE

日本落叶松芯材用碱性亚硫酸盐蒽醌法制浆之后,用纤维素酶进行了水解处理.我们调整了蒸煮液中的Na2SO3添加率,发现以40%Na2SO3的添加率蒸煮时获得了高浆得率和最低的木素含量.蒽醌纸浆水解时,水解产物当中水解的葡萄糖量,在所有的纤维素霉添加率上,含有少量木素的纸浆高于含有大量木素的纸浆(滤纸纤维素酶单位:FPU).

Alkaline sulfite-anthraquinone（AS-AQ） cooking was applied to the pretreatment for enzymatic hydrolysis of cellulose of Japanese larch（Larix leptolepis） heartwood.We changed the ratio of Na2SO3 in the cooking liquors,and found that the 40% ratio of Na2SO3 at chips cooking had the capability of acquiring a high pulp yield and the lowest lignin content compared to others.During the hydrolysis of AS-AQ pulps,the content of glucose hydrolyzed in the enzymatic hydrolysate of a pulp containing a small amount of lignin was higher than that of a pulp containing a large amount of lignin at any cellulase charges（Filter paper cellulase unit： FPU）.We determined the enzyme adsorption to the pulps by pyrolysis-gas chromatography/ mass spectrometry（Py-GC/MS）.