摘要
针对藻类在常规水处理过程中难以被有效去除的现状,采用超声预处理对太湖高藻水混凝过程进行强化.研究结果表明:在20mg/L的聚合氯化铝投加量条件下,采用功率为100W的超声预处理15s可强化混凝效果,有效去除90%以上藻细胞,降低沉后水浊度;低频条件下超声频率并非藻类去除效果的决定性因素;超声总能量和时间影响强化混凝效果,功率高于200W或处理时间长于30s会影响混凝效果.在过量条件下进行超声预处理会造成胞内物质及藻毒素的严重释放,实际应用中须合理确定其作用参数.
Aimed at conventional removal of low algae,enhance dultrasonic coagulation treatment of high-algae water from Taihu lake were studied.The results show that： ultrasonic irradiation,with an aluminium polychloride dose of 20 mg/L,at 100 W for 15 s can significantly enhance the removal of algae（more than 90%） and the turbidity,the ultrasonic frequency was not a decisive factor for algae removal in low frequency range;ultrasonic dosage decides the effect of ultrasonic enhanced coagulation.High power（more than 200 W） or long duration（more than 30 s） ultrasonic irradiation could influence coagulation and bring release of intracellular substances and microcystins,and the ultrasonic parameter should be determined properly in practical uses.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第1期110-113,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家科技重大专项资助项目(2008ZX07421-002)
国家自然科学基金资助项目(50908073)
关键词
藻
超声
强化混凝
藻毒素
释放
algae
ultrasound
enhanced coagulation
microcystin
release
