制浆中段废水污染特征研究

The Contaminative Characteristics of the Effluent from Bleaching and Washing Plants

研究了木浆和竹浆中段废水的污染特性。结果表明,制浆中段废水生化处理性很差,常规的活性污泥法对该废水的脱色效果不理想,甚至会引起木浆中段废水颜色的加深;pH值增大,中段废水的颜色加深;中段废水相对分子质量大的有机污染物是废水色度和溶解性CODCr的主要来源;制浆中段废水中的有机污染物是以胶体形态存在的,其表面电位为负值,生化处理后废水的Zeta电位降低。

The contaminative characteristics of the effluent from bleaching and washing plants where wood and bamboo are used as raw materials are studied. The results show that the biodegradability of the effluent is poor,decolorizatiun of the effluent by conventional active sludge process is not effective,color of the effluent will become darker as pH increases,the organic compounds with high molecular weight are the main source of the color and the soluble CODcr in the effluent,the organic contaminative compounds are electronegative colloid in the effluent and its ξ potential will decrease after biochemical treatment.