CAJ | 학술논문

绿液的主要成分是Na2CO3和Na2S，可在硫酸盐浆厂碱回收系统中循环产生。将新疆棉秆在不同温度、硫化度和用碱量下经绿液预处理后，在不同酶用量下进行酶水解，并测定酶水解液中总糖得率以评价预处理效果。结果表明，原料预处理得率随用碱量的增加而下降。适当地提高蒸煮温度和用碱量，可以增加木质素脱除量，有利于后续酶水解的进行，但过于剧烈的预处理条件将导致碳水化合物的过度降解，因而降低酶水解糖的转化率。另外，由于新疆棉秆细小，棉秆皮占全秆比例较大，原料总糖含量较低，导致最终酶水解总糖得率偏低。在温度120℃，用碱量16％，硫化度32％条件下绿液预处理，酶水解糖转化率达到最大值，当酶水解酶用量为20FPU／g（对浆料）时，葡聚糖、木聚糖和总糖的转化率分别为74．0％、61．3％和68．5％。
록액적주요성분시Na2CO3화Na2S，가재류산염장엄감회수계통중순배산생。장신강면간재불동온도、류화도화용감량하경록액예처리후，재불동매용량하진행매수해，병측정매수해액중총당득솔이평개예처리효과。결과표명，원료예처리득솔수용감량적증가이하강。괄당지제고증자온도화용감량，가이증가목질소탈제량，유리우후속매수해적진행，단과우극렬적예처리조건장도치탄수화합물적과도강해，인이강저매수해당적전화솔。령외，유우신강면간세소，면간피점전간비례교대，원료총당함량교저，도치최종매수해총당득솔편저。재온도120℃，용감량16％，류화도32％조건하록액예처리，매수해당전화솔체도최대치，당매수해매용량위20FPU／g（대장료）시，포취당、목취당화총당적전화솔분별위74．0％、61．3％화68．5％。
Green liquor consists of sodium carbonate and sodium sulfide and is generated in chemical recovery system of a kraft mill. Cotton stalk was pretreated by green liquor （GL） at different total titrateable alkali （TTA） charge, sulfidity and temperature. The pretreated materials were hydrolyzed with different enzyme dosages to evaluate the effects of GL pretreatment on sugar yield improvement. The results show that the cooking yield drops with the increase of TTA charge. A reasonable increase of the pretreatment TTA charge and suifidity can promote the sugar conversion ratio efficiently. A strong pretreatment leads to a serious degradation of carbohydrate and lowers sugar recovery in the following enzymatic hydrolysis. In addition, cotton bark accounts for a larger proportion of cotton stalk, leading to a low final yield of total sugar hydrolysis. The conversion ratio of glucan, xylan and total sugar in cotton stalk pretreated by 16% TTA and sulfidity 32% at 120℃ reached up to 74.0%, 61.3%, and 68.5%, respectively, while cellulase load was 20 FPU/g substrates.