论文部分内容阅读
酶处理木片能降低磨浆过程的能耗,还可以对纤维引入一些新的功能特性。在螺旋挤压机挤压木片过程中,加入各种生物酶可提高酶对木片纤维的可及性。酶处理6h后使用实验室低强度磨浆机测试了磨浆能耗。实验结果与采用白腐菌(Physisporinus rivulous)生物制浆结果进行了比较。测量了一段磨浆的能耗,并评价了酶处理对纤维的化学改性效果。苏格兰松木片经过锰过氧化物酶处理后,磨浆能耗比未处理过的参比试样降低了11%,挪威云杉处理后其磨浆能耗降低稍少,约6%。真菌预处理云杉木片结果与锰过氧化物酶处理结果相似,可以节约磨浆能耗。尽管水解酶处理松木木片在最好条件下能降低15%的能耗,但水解酶和锰过氧化氢处理在平均能耗节约上相似。聚电解质滴定结果表明,经过锰过氧化物酶处理并磨浆至低游离度(CSF85～130mL)的松木浆料的纤维表面电荷量增加。大多采用白腐菌或是酶处理过的浆料,在一定的能耗下磨浆并抄造的手抄片,大部分的性能均有所提高,如强度、光散射系数和不透明度,仅白度稍有降低。锰过氧化物酶处理将成为节约能源和改进纤维表面性能的一种重要处理方式。
Enzymatic treatment of wood chips can reduce the energy consumption of the refining process, but also to the fiber to introduce some new features. In the process of squeezing wood chips by screw extruder, adding various biological enzymes can increase the accessibility of the wood chips to the fibers. After 6 h of enzyme treatment, the refining power consumption was tested using a laboratory low strength refiner. The experimental results were compared with the results of the biopulping using Physisporinus rivulous. The energy consumption for a period of refining was measured and the chemical modification of the fibers by the enzyme treatment was evaluated. After manganese peroxidase treatment, the energy consumption of the Scottish pine chips was reduced by 11% compared with that of the untreated reference samples. The energy consumption of the Norwegian spruce declined slightly after the treatment, about 6%. Fungal spruce pretreatment results and manganese peroxidase treatment results are similar, you can save refining energy consumption. Although hydrolase treated pine chips reduced energy consumption by 15% under the best conditions, hydrolase and manganese peroxide treatment were similar in average energy consumption savings. Polyelectrolyte titration results showed that the amount of charge on the fiber surface of the pine pulp slurry treated with manganese peroxidase and pulverized to low freeness (CSF 85-130 mL) increased. Most of the white rot fungus or enzyme-treated slurry, under certain energy consumption and copy papermaking manual sheet, most of the performance has improved, such as strength, light scattering coefficient and opacity, white only Degree slightly lower. Manganese peroxidase treatment will be an important way to save energy and improve fiber surface properties.