絮凝剂对打桩废弃泥浆的处理研究

摘要

采用两步絮凝法,详细考察了几种无机絮凝剂和有机絮凝剂对泥浆絮凝效果的影响,实验表明,在泥浆固液分离实验中,阴离子聚丙烯酰胺(APAM)对泥浆的絮凝效果最好；在泥浆废水的絮凝实验中,最优絮凝剂为聚合氯化铝,其最佳浓度为0.01 g/L,絮凝处理后COD为85.71 mg/L,SS去除率为99.60%,上清液SS为0.91 mg/L,满足GB 8978—1996污水综合排放标准中的一级排放标准。%In this study, flocculation method is divided into two steps. Several inorganic flocculants and organic flocculants are being studied to find out the optimal one. Mud flocculation experiments show that anionic polyacrylamide( APAM) demonstrates the best flocculation effect. In follow-up wastewater flocculation experiments, polyaluminium chloride(PAC) is the most effective flocculants. The optimum dose of PAC is 0. 01 g/L COD is 85. 71 mg/L after flocculation treatment. The removal rate of suspended solid(SS) is 99. 60%. The concentration of SS in superna-tant fluid is 0. 91 mg/L. The water quality meets the first grade standard of Integrated Wastewater Discharge Standard of China(GB 8978—1996).