磷酸铵镁沉淀法回收污泥浓缩液中磷的实验研究  

Experimental study on recycling of phosphorus from sludge concentrated solution by magnesium ammonium phosphate precipitation method

作　　者：袁鹰[1] 曹健[1] 刘明源[1] YUAN Ying;CAO Jian;LIU Ming-yuan(Taizhou Polytechnic College,Taizhou 225300,China)

机构地区：[1]泰州职业技术学院,江苏泰州225300

出　　处：《化学工程师》2023年第7期52-55,共4页Chemical Engineer

基　　金：2021年泰州职业技术学院大学生创新创业训练计划项目(No.YJDC2021001)。

摘　　要：利用磷酸铵镁沉淀法收集污泥浓缩液中磷,考察了pH值、搅拌强度、反应时间对磷回收率的影响,结果表明,污泥浓缩液中n(NH_(4)^(+)-N)∶n(Mg^(2+))∶n(PO_(4)^(2-))>1,有利于用磷酸铵镁沉淀法回收磷,在pH值为9、搅拌速度为40r·min^(-1)、反应时间为20min的条件下可使磷回收率达到90%以上,此时MgNH_(4)PO_(4)·6H_(2)O纯度也较好,废水处理成本也相对合理。Magnesium ammonium phosphate precipitation method was used to recycle of phosphorus from the sludge concentrated solution,and the effects of pH,stirring intensity and reaction time on phosphorus recovery were investigated.The results show that the n(NH_(4)^(+)-N)∶n(Mg^(2+))∶n(PO_(4)^(2-))>1 in the sludge concentrated solution was conducived to the recovery of phosphorus by magnesium ammonium phosphate precipitation.Under the conditions of pH valuef of 9,stirring intensity of 40r·min^(-1)and reaction time of 20min,the phosphorus recovery rate can reach more than 90%,the purity of magnesium ammonium phosphate was also good,and the cost of wastewater treatment was relatively reasonable.

关 键 词：磷酸铵镁法 污泥浓缩液 磷回收率 

分 类 号：X703[环境科学与工程—环境工程]