Rudolph Gregor, Al-Rudainy Basel, Thuvander Johan, Jönsson Ann-Sofi
Department of Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden.
Department of Food Technology, Engineering and Nutrition, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden.
Membranes (Basel). 2021 Mar 12;11(3):201. doi: 10.3390/membranes11030201.
Fouling is a major obstacle in the introduction of membrane processes in new applications in the pulping industry. Due to the complex nature of the feed solutions, complementary analysis methods are usually needed to identify the substances involved. Four different methods were used for the comprehensive analysis of a membrane removed from an ultrafiltration plant treating alkaline bleach plant effluent in a sulfite pulp mill to identify the substances causing fouling. Magnesium was detected both on the membrane surface and in the nonwoven membrane backing and a small amount of polysaccharides was detected after acid hydrolysis of the fouled membrane. This study provides information on foulants, which can be used to improve processing conditions and cleaning protocols and thus the membrane performance in pulp mill separation processes. It also provides an overview of the usefulness of various analytical methods.
污垢是制浆工业新应用中引入膜工艺的主要障碍。由于进料溶液的性质复杂，通常需要补充分析方法来识别其中涉及的物质。采用四种不同方法对从亚硫酸盐制浆厂处理碱性漂白厂废水的超滤装置中取出的膜进行综合分析，以确定造成污垢的物质。在膜表面和非织造膜背衬中均检测到镁，对污染膜进行酸水解后检测到少量多糖。本研究提供了有关污垢物的信息，可用于改善工艺条件和清洗方案，从而提高制浆厂分离过程中的膜性能。它还概述了各种分析方法的实用性。
