宣纸生产中黑液的物化处理

Treatment of the Black Liquor from Xuan Paper Production with Physical and Chemical Method

宣纸是我国手工纸中最著名的一种,其生产废水中檀皮蒸煮黑液的CODCr浓度相当高,达42000mg·L-1。实验采用微电解-絮凝-吸附的组合工艺对其进行处理,主要考查了各阶段处理的主要影响因素及其处理效果关系。结果表明:经过整个工艺3个阶段的处理,最终出水的CODCr为3481.9mg·L-1,去除率达91.7%,色度为10倍,去除率高达97.5%。这是一个有效的预处理工艺,并能节约大量的稀释用水。

Xuan paper is one of the most famous handwork paper in our country, CODc, of the black liquor of Xuan paper is quite high, 42000mg·L^-1. The combined process of microelectrolysis-flocculation-adsorption technology is used to treat the black liquor, the relationship between the influencing factors of every stage and the treatment effect is studied. The result shows： Through three stages＇treatment, the CODcr and the chromah of the final effluent is 3 481.9 mg·L^-1, 10 times, respectively; the removal rate of them is 91.7% and 97.5%. This combined process is efficient one that can be used for the pretreatment.