微污染水混凝最优水力条件研究  

Optimization of Hydraulic Condition on Flocculation for Micro-polluted Water

作　　者：李鹰[1] 刘峙嵘[1] 戴荧[1] 

机构地区：[1]东华理工大学化学生物与材料科学学院,江西抚州344000

出　　处：《湿法冶金》2010年第2期108-113,共6页Hydrometallurgy of China

基　　金：江西省青年科学家(井冈之星)培养对象计划;项目编号:2009DQ01600

摘　　要：以聚合磷硫酸铁为絮凝剂,强化混凝处理模拟微污染水,并引入新的参数——分形维数作为净化控制指标,系统考察了混合速度、混合时间、絮凝速度、絮凝时间、沉淀时间等因素的影响,并通过响应曲面法对水力条件进行优化,得出最佳水力条件为:混合速度为244.32 r/min,混合时间为40.55 s,絮凝速度为61.56r/min,絮凝时间为15.66 min,沉淀时间为32.35 min。在此条件下,絮体分形维数为1.7668,与拟合的二次回归模型预测值基本相符,相应的浊度及COD(Mn)去除率分别为85.34%和62.03%。The effects of mixing rate, mixing time, flocculating velocity and flocculating time for simulation micro-polluted water using polymeric ferric phosphoric sulfate as flocculent by strengthen hydraulic condition technology were investigated systematically. The hydraulic conditions were optimized by the response surface method. The optimum hydraulic conditions are mixing rate of 244. 32 r/rain, mixing time of 40. 55 s, sedimentation time of 40.55 s, flocculating velocity of 61.56 r/min, flocculating time of 15. 66 rain. The fractal dimension can be up to 1. 766 8. The validation test results show that the prediction values of the fitted quadratic regression model are agreed with the experimental values.

关 键 词：响应曲面法 水力条件 聚合磷硫酸铁 分形维数 

分 类 号：X52[环境科学与工程—环境工程]