赤泥强化型河岸带模拟系统对再生水中磷去除效果的研究

为了探讨不同比例赤泥施入量对再生水磷去除效果的影响以及植物在再生水净化过程的作用，利用赤泥中富含钙、铁、铝等金属氧化物对磷具有较强吸附性能的特点，构建了室内赤泥强化型河岸带模拟系统.结果表明，赤泥最适施入质量分数为2.5%～5.0%，此时TP去除率为82%～76%，出水磷浓度约为0.22～0.29 mg/L，SRP/TP比值为74%～75%.当赤泥施入量为2.5%时，相比无植物系统，有植物系统的磷净化效率提高了4%，约为86%，出水磷浓度为0.17mg/L.这些结果表明赤泥可以适当比例直接掺混于河岸带的土壤中，这为其提高对再生水中磷的去除能力提供了一种新途径.

Performance of Phosphorus Removal by Simulated Riparian Zone Enhanced with Red Mud Treating Reclaimed Water

The effect of red mud and the role of plants on the phosphorus removal of the reclaimed water were studied by lab-scale simulated riparian zone, which made well use of sintered red mud with well adsorption capacity for phosphorous due to its high contents of Ca, Al and Fe oxides. The results show that the suitable ratio range of adding red mud is 2.5%-5.0%, and correspondingly, the removal of phosphorus is as high as 82%-76%, resulting in 0.22-0.29 mg/L of effluent TP concentration and 74%-75% of SRP/TP. When the percentage of adding red mud is 2.5%, comparing with the system without plants, the performance of the system with plants improves by 4%, reaching to 86% and 0.17mg/L of effluent TP concentration. Obviously, red mud can be directly used in the riparian zone to enhance the phosphorus removal as a new and cheap material.