聚硅酸硫酸铝絮凝剂去除生活污水中磷的研究  

Study on polynucleate aluminum hydroxyl silicate-sulphate flocculent removing phosphorus in sanitary sewage

作　　者：胡文云[1] 杨春林[1] 

机构地区：[1]武汉轻工大学化学与环境工程学院,湖北武汉430023

出　　处：《武汉轻工大学学报》2016年第2期45-49,共5页Journal of Wuhan Polytechnic University

摘　　要：以硅酸钠(Na Si O3·9H2O),硫酸铝(Al2(SO4)3·18H2O)和硫酸为原料合成了聚硅酸硫酸铝(PASS)絮凝剂,对PASS通过红外光谱和X射线衍射分析进行表征。考察了PASS对生活污水中磷去除的性能,具体的影响因素有:絮凝剂投加量,絮凝过程水力条件,污水的p H值和温度等。单因素实验结果表明,各因素的最佳取值分别为:投加量为10.0 g/L,污水的p H值为5,污水的加热电压为40 V,絮凝过程的混合转速为150 r/min,混合时间为2 min,絮凝过程的反应转速为100 r/min,反应时间为20 min,絮凝过程的沉降时间为50 min。在单因素影响研究的基础上,设计了四因素三水平的正交实验,结果表明PASS絮凝剂对生活污水中磷去除的性能的最佳组合条件为:投加量为15.0 g/L,p H值为5,混合时间为1min,反应转速为100r/min;各因素的影响顺序为:p H值>投加量>混合时间>反应转速。A new process of preparing polynucleate aluminum hydroxyl silicate-sulphate compound（ PASS） was synthesized by sodium silicate,aluminum sulfate and sulfuric acid in this paper,and it was characterized by IR and XRD. The elimination phosphorus property of PASS for the sewage was investigated,and the concrete influencing factors were the agent amount,p H,temperature and the condition of hydraulic power etc. The results of single factor experiments showed the best condition for each factor： the dose of PASS was 10.0 g / L,the p H was 5,the admixture turn was 150 r / min,the mixing time was 2 minutes,the reacting rotational speed was 100 r / min,the mixing time was 20 minutes,the setting time was 50 minutes. On the basis of single factor research,the L9（ 34） orthogonal experiment was carried on. The results showed the best condition was that the optimum dose of PASS was 15.0 g / L,the optimum p H was 5,the best mixing time was 1minutes,and the optimum reacting rotational speed was100 r / min.The influencing order was respectively the p H,agent amount,mixing time and reacting rotational speed.

关 键 词：聚硅酸硫酸铝 絮凝剂 含磷生活污水 除磷 

分 类 号：X703[环境科学与工程—环境工程]