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首页> 外文会议>Fourth International Nonwood Fibre Pulping and Papermaking Conference (4th INWFPPC) (Secondary Fibre Processing Inclusive) Vol.1 Sep 18-21, 2000 Jinan, China >Preliminary Study on the Laccase/Mediator System Biobleaching of Bagasse Kraft Pulp
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Preliminary Study on the Laccase/Mediator System Biobleaching of Bagasse Kraft Pulp

机译：蔗渣纸浆的漆酶/介体系统生物漂白的初步研究

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摘要

In this paper, preliminary study on the laccase/mediator system(LMS) biobleaching of bagasse kraft pulp was carried out. Laccase was produced using a selected strain of Panus conchatus. Activity of laccase was measured with ABTS as substrate. A new mediator ―N-hydroxyacetanilide(NHA) was synthesized by reaction of hydroxybenzenamine with acetyl chloride. Laccase in the presence of NHA and oxygen was used in the bleaching of bagasse kraft pulp. The effects of laccase and mediator dosages, oxygen pressure during LMS treatment on the delignification rate, pulp brightness and viscosity were investigated. Xylanase in the bleaching sequence after the LMS improved the final brightness of peroxide bleached pulp, but before or together with the LMS, it had no benefit. The results indicate the LMS biobleaching is a high efficient, non pollution bleaching process. Bagasse kraft pulp could be bleached to a brightness of 80%ISO after LMS treatment, alkaline extraction and peroxide bleaching with 2% H_2O_2.
机译：本文对甘蔗渣牛皮纸浆的漆酶/介体系统（LMS）生物漂白进行了初步研究。漆酶是使用选定的Panus conchatus菌株生产的。以ABTS为底物测量漆酶的活性。通过羟基苯甲胺与乙酰氯的反应合成了一种新的介质N-羟基乙酰苯胺（NHA）。在NHA和氧气存在下的漆酶用于蔗渣牛皮纸浆的漂白。研究了漆酶和介质的用量，LMS处理过程中的氧气压力对脱木素率，纸浆白度和粘度的影响。 LMS之后的漂白顺序中的木聚糖酶可提高过氧化物漂白纸浆的最终白度，但在LMS之前或与LMS一起使用时，它没有好处。结果表明，LMS生物漂白是一种高效，无污染的漂白过程。经过LMS处理，碱提取和2％H_2O_2的过氧化物漂白后，蔗渣牛皮纸浆可被漂白至80％ISO的亮度。

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