Treatment of black liquor from the papermaking industry by acidification and reuse

Article type: Research Article

Authors: Yang, Wen-bo | Mu, Huan-zhen | Huang, Yan-chu

Affiliations: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

Abstract: Two different kinds of black liquor from the papermaking industry were treated by acidification and reuse. The experimental parameters and conditions were discussed in detail. The experimental results indicated that the treatment process mentioned in this article is an effective process for the treatment of black liquor from the papermaking industry. By the treatment, the solid materials in black liquor are transferred into two by-products and the other components are reused or evaporated. Thus, no wastewater except some condensation water would be discharged in pulping process and the problem of pollution of black liquor would be effectively solved.

Keywords: black liquor, acidification, reuse, lignin, water-reducing agent

Journal: Journal of Environmental Sciences, vol. 15, no. 5, pp. 697-700, 2003