Performance of a novel vertical-flow settler: a comparative study

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Performance of a novel vertical-flow settler: a comparative study
	Zhang Zhong-guo; Chen Zhao-yang; Li Yan-zhong; Fan Jing-hua; Fan Bin; Luan Zhao-kun; Lu Dao-qiang
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
	2006
卷号	18 期号:5 页码:858-863
关键词	vertical-flow settler settling tank flocs blanket coagulation flocculation PACI
英文摘要	By increasing particle concentration and C value (root-mean-square velocity gradient) to enhance flocculation, a novel vertical-flow settler was designed to increase sedimentation effectiveness, and to simultaneously improve operational stabilization. Due to the gradual decrease in upward flow-rate of raw water, a floes blanket would form and suspend in the middle section of the settler, not at the bottom as in a conventional clarifier. Enough large floes, resulted from flocculation or filtration, would continuously settle out of the floes blanket, and simultaneously, the floes in raw water or those forming above the blanket would ceaselessly enter the flocs blanket. As a result, the floes concentration in the blanket could keep a dynamic balance. The hydrodynamic shear in the blanket was improved by flow separation, which was induced by the abrupt change in flow channel. Due to the floes blanket and improved hydrodynamic shear, flocculation would be enhanced, which was helpful for removing fine particles in raw water. A comparative study showed that the novel vertical-flow settler had a much better performance in the removal of the particles in raw water than a conventional one, when they treated kaolin suspensions of different concentrations (500, 100 and 50 mg/L, respectively) coagulated by polyaluminum chloride(PACI) at the up-flow rates of I and 2 mm/s, respectively.
WOS记录号	WOS:000240445400005
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/23014]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Zhang Zhong-guo,Chen Zhao-yang,Li Yan-zhong,et al. Performance of a novel vertical-flow settler: a comparative study[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2006,18(5):858-863.
APA	Zhang Zhong-guo.,Chen Zhao-yang.,Li Yan-zhong.,Fan Jing-hua.,Fan Bin.,...&Lu Dao-qiang.(2006).Performance of a novel vertical-flow settler: a comparative study.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,18(5),858-863.
MLA	Zhang Zhong-guo,et al."Performance of a novel vertical-flow settler: a comparative study".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 18.5(2006):858-863.