基于实时控制的电絮凝-气浮处理重金属清淤尾水  

Treatment of residual water from heavy metals contaminated sediment dredging by electro-coagulation-flotation based on real-time control strategy

作　　者：徐海音[1,2] 杨朝晖[1,2] 曾光明[1,2] 罗远玲[3] 黄兢[1,2] 汪理科[1,2] 宋佩佩[1,2] 

机构地区：[1]湖南大学环境科学与工程学院,湖南长沙410082 [2]湖南大学环境生物与控制教育部重点实验室,湖南长沙410082 [3]长沙环境保护职业技术学院,湖南长沙410004

出　　处：《中国环境科学》2016年第3期786-792,共7页China Environmental Science

基　　金：国家自然科学基金资助项目(51578223;51521006);国家水体污染控制与治理科技重大专项(2009ZX07212-001-02)

摘　　要：针对重金属清淤尾水具有污染物浓度高、水质波动大、沉淀性能差等特点,选取p H值和浊度作为实时监测因子,并借助沉淀模拟和数据拟合等手段,建立了比电流与镉残留量之间的实时控制响应模型.结果表明:铝-电絮凝-气浮兼有中和p H值和改善泥水分离的优点,实现了重金属铅、镉和锌的达标排放;此外实时控制策略节省了35.8%的材料消耗和43.4%的电能消耗以及降低了47.9%的产泥量.Residual water from heavy metals contaminated sediment dredging had high concentrations of heavy metals, fluctuant water-quality and poor sedimentation. Electro-coagulation-flotation with aluminium anode（Al-ECF） was applied to treat residual water. First, p H and turbidity were selected as monitoring factors of real-time control. Then, a real-time control response model of ratio current and residual cadmium（Cd） was established by the tools of precipitation simulation and data fitting. Experiment results showed that Al-ECF could neutralize p H and improve separation performance and lead（Pb）, Cd and zinc（Zn） of effluent met the discharge standards. Additionally, the real-time control strategy could save 35.8% of anode material and 43.4% of electricity power and reduce 47.9% of sludge production.

关 键 词：电絮凝 气浮 清淤尾水 实时控制 重金属 

分 类 号：X703[环境科学与工程—环境工程]