摘要
对影响光叶楮白皮生物脱胶制浆的主要因素及脱胶酶特性进行了研究。结果表明，生物脱胶制浆的最优工艺条件为：初始pH值7，温度30℃，液比1：15～1：25，接种量3％；加入氨源助剂能够显著提高成浆效果，且以用量为1．5％。2．5％的尿素为佳。最优条件下的制浆结果为：得率70．O％，高锰酸钾值14，6，白度43，2％ISO，成浆时间94h，废液pH值4．0，CODc。值为O．337L／t浆。脱胶酶活力分析结果表明：发酵初期，酶活力都随时间延长而升高，发酵至36h，果胶酶活力达到峰值，木聚糖酶活力在发酵至60h达到峰值，峰值过后，2种酶的活力随时间延长逐渐降低，纤维素酶活力在整个周期内缓慢增加，没有峰值出现。
The main factors affecting bio-degumming for guangyechu white bast pulping and the characteristics of degummase were studied in this paper. The optimum conditions for degumming pulping are initial pH value 7, temperature 30℃, ratio of material to liquor 1 ： 15 - 1 ： 25, amotmt of inoculum 3% ; 1.5% - 2.5% charge of urea added into the liquor can obviously improve the effect of pulping. The results are as follows： pulp yield 70.02%, KMnO4 value 14.56, brightness of the pulp 43.2 % ISO, pulping period 94h, pH value of the spent liquor 4.05, CODer 0. 337t/t（pulp）. The analysis of enzyme activity in biological degumming process showed that： the enzymes＇ activity all increase with the time increasing in initial fermentation stage, the pectinase activity reaches maximal level at the time of 36h, the xylanase activity reaches maximal level at the time of 60 h, these two enzymes＇ activity gradually decreases afterward. The eellulase activity increases slowly in the whole period and has no maximal level appears.
出处
《中国造纸学报》
EI
CAS
CSCD
2006年第4期22-25,共4页
Transactions of China Pulp and Paper
关键词
光叶楮白皮
生物脱胶
酶活力
guangyechu white bast
bio-degumming
enzyme activity
