Bleaching with lignin-oxidizing enzymes.

摘要: General concern about the environmental impact of chlorine bleaching effluents has led to a trend towards elementary chlorine-free or totally free methods. Considerable interest been focused on use biotechnology in pulp bleaching, as large number microbes and enzymes produced by them are known be capable preferential degradation native lignin complete wood. Enzymes hemicellulolytic type, particularly xylan-attacking xylanases now used commercially mills for treatment subsequent incorporation into bleach sequences. Certain white-rot fungi can delignify Kraft pulps increasing their brightness responsiveness brightening with chemicals. The fungal treatments too slow but from also these enzymatic processes likely easier optimize apply than treatments. This article presents an overview developments application lignin-oxidizing chemical pulps. present knowledge mechanisms action well practical results advantages obtained laboratory industrial scale discussed.