漆酶/木聚糖酶体系去除废新闻纸脱墨浆中胶黏物的研究

废纸浆因含有大量的细小组分和阴离子杂质，极大地影响了纸机网部的滤水性能和成纸质量。笔者应用漆酶处理废新闻纸脱墨浆，研究其去除胶黏物的效果。结果表明：漆酶/木聚糖酶体系（LXS）处理废纸脱墨浆，能有效去除浆料中胶黏物，尤其是漆酶/木聚糖酶体系处理后碱抽提（LXS+E）去除效果更佳。在酶用量为15 μmol/(min·g)时，LXS和LXS+E处理后与原浆相比，浆中胶黏物分别降低了51.91 %和68.43 %，减轻了后续工序除胶黏物的负荷，改善了浆料滤水性。当漆酶用量为15 μmol/(min·g)时，LXS和LXS+E处理浆与原浆相比，打浆度分别降低了15.22 %和28.26 %。此外通过这两种方法处理还能提高浆料的强度，而浆料得率却稍有下降。

Study on removing stickies containing in the deinked pulp of waste newspaper by laccase/xylanase treatment

The composition of waste newspaper is very complex and contains a mass of fine components and anionic trashes.This greatly influences the drainability of paper machine wire end and paper quality.The laccase/xylanase system(LXS) treatment of deinked waste newspaper pulp for removing stickies was investigated in this paper.The results indicated that:the laccase treatment of the deinked waste newspaper pulp could effectively remove the stickies in the pulp especially after alkaline extraction(LXS+E).As compared with original pulp,the stickies in pulp after LXS and LXS+E treatment at enzyme dosage 15 μmol/(min·g) decreased by 51.91 % and 68.43 % respectively.The load of removing stickies in the following processes was reduced and the pulp drainability was improved.As compared with original pulp,the beating degree of pulp after LXS treatment and LXS+E treatment at enzyme dosage 15 μmol/(min·g) decreased by 15.22 % and 28.26 % respectively.The strength of pulp with the two enzymatic treatment was improved,but the yield of pulp slightly decreased.