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生产用水(或白水)中溶解物及细小分散物质的积累,会降低纸厂产品质量,影响造纸操作效率,这些问题越来越突出。文章综述了各种已开发的去除白水中污染物的方法,主要方法包括膜过滤、絮凝化学品的使用、厌氧或好氧生物处理、酶处理、氧化剂处理以及多效蒸发。纸厂无论采用何种净化措施,都应首先降低清水使用量,减少需要处理的水量。浆料的有效洗涤与好的助留系统一样重要,可降低白水净化中所使用的肾系统的负担。
The accumulation of dissolved substances and finely dispersed substances in the production water (or white water) will reduce the quality of paper products and affect the efficiency of paper making. These problems are becoming more and more prominent. Various methods developed to remove contaminants in white water are reviewed. Major methods include membrane filtration, use of flocculating chemicals, anaerobic or aerobic biological treatment, enzymatic treatment, oxidant treatment, and multi-effect evaporation. No matter what kind of purification measures the paper mill should first reduce the amount of water used to reduce the need to deal with the amount of water. Effective washing of the slurry is just as important as a good retention system, which reduces the burden on the renal system used in white water purification.