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本实验以烧碱-蒽醌法蔗渣浆为原料,选用3种漆酶漂白的天然介体和1种合成介体,对蔗渣浆进行LQP三段处理,以此来考察不同介体及用量对处理后纸浆白度、强度及漂后废水COD污染负荷的影响。经过研究可知,纸浆经LQP三段处理,其白度明显得到改善,且纸浆不易返黄;纸页的抗张指数、耐破指数、撕裂指数均有不同程度的改善;添加天然介体的P段废水CODCr值明显低于合成介体HBT的废水CODCr值,且低于未添加介体的空白试验废水CODCr值。因此,天然介体比合成介体在改善纸浆性能、降低漂白废水污染方面更具优势。
In this experiment, bagasse pulp from caustic soda-anthraquinone was used as raw material. Three kinds of laccase bleached natural mediators and one kind of synthetic mediator were selected to process LQP three stages of bagasse pulp, in order to investigate the effects of different mediators and dosage on the treatment After pulp whiteness, strength and impact of floating COD pollution load. After the study, we can see that the whiteness of the pulp treated by LQP is obviously improved, and the pulp is not easy to revert to yellow; the tensile index, burst index and tear index of the paper sheets all improved to some extent; The CODCr value of wastewater in P section was significantly lower than CODCr in wastewater of synthetic medium HBT and lower than CODCr in blank test wastewater without mediator. Therefore, natural mediators have more advantages than synthetic mediators in improving pulp performance and reducing bleaching wastewater pollution.