造纸黑液治理利用技术现状

Present status of the treatment of papermaking black liquor and its utilization technology

造纸黑液是一种成分复杂,污染负荷大而非常难以处理的有机废液。多年来人们一直努力探寻黑液治理利用途径,目前国内外大多采用了碱回收、酸析、生化、膜处理、絮凝沉淀氧化等数十种治理利用技术。作者从处理规模、治理的彻底性、综合利用程度及发展前景等方面对各种技术进行了较深入的分析比较,并结合我国实际对其发展趋势提出了相应的建议。

Papermaking black liquor is a sort of refractory organic waste liquid with intricate ingredients and serious pollution. For a long time, great efforts have been made to explore the paths of its treatment and utilization all over the world. At present, more than ten kinds of technologies have been utilized extensively, including alkali recovery, acidic separation, biochemistry, membrane treatment, flocculating settling oxygenation, etc. All types of technologies have been analyzed and compared in depth, from the aspect of treatment scale, the pollutant treatment thoroughness, comprehensive utilization extent and development foreground. Aiming at the facts in China, proposals on the development trend are presented.