改性砾石-电凝聚协同法去除高浓度磷

考察了改性砾石分别与氢氧化钙沉淀法、电凝聚法协同除去高浓度磷的效果。结果表明,酸改性砾石对高浓度磷去除率达76.92%,与氢氧化钙协同作用,pH为9时,磷的去除率为99.57%。改性砾石协同电凝聚法去除高浓度磷,在pH为7时磷的去除率达到99.75%,残留磷浓度仅为0.25 mg/L,与单一砾石或砾石协同氢氧化钙方法的除磷的结果相比较,改性砾石协同电凝聚法除磷方法具有明显优势。

Removing high concentration phosphorus by modified gravel cooperated with electro-coagulation

High concentration phosphorus was removed by modified gravel cooperated with calcium hydroxide and electro-coagulation respectively.The phosphorus removal rate in the simulating wastewater was 76.92% by acid-modified gravel,and the removal rate was 99.57% as the modified gravel and calcium hydroxide were used simultaneously at pH 9.When the synergetic effect between the modified gravel and electro-coagulation was applied,the phosphorus removal rate was up to 99.75%,and the remaining concentration of phosphorus was 0.25 mg/L at pH 7.It was found that the total achievement of the modified gravel cooperated with electro-coagulation was better than the result of acid-modified gravel as well as modified gravel-calcium hydroxide.