摘要
用高锰酸钾和硫酸铜分别对铜绿微囊藻进行化学预处理,再通过烧杯搅拌试验研究以高岭土为助凝剂,用PAC絮凝去除经过了化学预处理后的铜绿微囊藻的效果。结果表明,高锰酸钾或硫酸铜预处理以不同方式影响叶绿素a(Chla)和浊度的去除。Chla的去除率随高锰酸钾投加量的增加而增加,且在1.0 mg/L投加量时达到92.6%。而硫酸铜预处理时Chla的去除率在其投加量为0.2 mg/L时最高,但在1.0 mg/L时减少到72.8%。高锰酸钾或硫酸铜化学预处理的除藻效果一般不如用高岭土助凝。甚至经高锰酸钾或硫酸铜预处理后,再用高岭土助凝除藻的效果也有所下降。就处理效率和饮用水安全而言,用高岭土助凝是优于用高锰酸钾或硫酸铜进行除藻预处理的技术。
The removal efficiency of Microsystis aeruginosa after pretreated with KMnO4 and CuSO4, respectively, was studied with jar tests using polyaluminum chloride （PAC） as a coagulant, and Kaolin as a coagulant-aid. The results indicated that removal efficiency of chlorophyll a （Chla） and turbidity were affected obviously with the KMnO4 or CuSO4 pretreatment. Chla removal efficiency increased with KMnO4 dosage increasing, and reached 92.6 % at 1.0 mg/L KMnO4. For CuSO4 pretreatment, the highest Chla removal was obtained at 0.2 mg/L, but decreased to 72.8 % at 1.0 mg/L. In general, the coagulated removal efficiency of M. aeruginosa pretreated with KMnO4 or CuSO4 was less than that with Kaolin as a coagulant-aid. And even with Kaolin as the coagulant-aid, the coagulated removal efficiency of the tested algal decreased after the algal was pretreated with KMnO~ or CuSO4. the coagulant-aid effect of Kaolin decreased. Thus, Kaolin as coagulant aid is better than KMnO4 or CuSO4 as pretreatment chemicals for the algal coagulated removal with respect to treatment efficiency and drinking water safety.
出处
《净水技术》
CAS
2009年第3期18-22,共5页
Water Purification Technology
基金
国家自然科学基金项目(No.50778065)
欧盟国际合作项目ASEM Water Net(PL510897)
湖南省重点科技项目(03WHY1001)
湖南省环保科技资金项目
