石灰沉淀—浮选分离法回收废水中磷的研究  

Recovery of Phosphorus from Wastewater by Using Lime Precipitation-air Flotation

作　　者：杨建峰[1] 孙体昌[1] 寇珏[1] 雪梅[1] 孙娟[1] 

机构地区：[1]北京科技大学环境工程系,北京100083

出　　处：《矿产保护与利用》2006年第6期36-40,共5页Conservation and Utilization of Mineral Resources

摘　　要：用模拟废水进行了石灰沉淀—浮选分离法回收废水中磷的研究。包括沉淀和浮选试验。沉淀试验的目的是确定用CaO调节pH值去除磷的最佳用量、氨氮和Mg2+的存在对磷沉淀效果的影响。通过添加CaO调节pH值沉淀废水中的磷,去除率可高达99.88%,再通过浮选的方法回收磷。浮选试验部分包括捕收剂种类、用量及调整pH值的试验,浮选的最佳条件是采用癸酸为捕收剂,浮出沉淀中磷的含量为11.16%、磷的浮选回收率为94.93%。The factors influencing the recovery of phosphorus from simulated wastewater by using lime precipitation -air floatation was studied. The experiments include precipitation test and flotation test. The aim of the precipitation test is to discover the best dosages of CaO which is used to remove phosphorus by changing the pH, the influence of NH4^＋ and Mg^2＋ present in the wastewater. The removal rate of phosphorus was up to 99.88%. The test of flotation included changing the kinds of collector, the dosages of collector and pH. The results of flotation experiments showed that there were some differences among the floatation process with different collectors. The flotation resuits by using capfic acid as collector is the best. The grade of phosphorus in the floated precipitate is 11.16% and its recovery is up to 94.93%.

关 键 词：除磷 石灰 沉淀浮选 废水 

分 类 号：X703.1[环境科学与工程—环境工程] TD923[矿业工程—选矿]