Simulation and optimization of airlift external circulation membrane bioreactor using computational fluid dynamics

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Simulation and optimization of airlift external circulation membrane bioreactor using computational fluid dynamics
	Zhang Qing ; Xu Rongle ; Zheng Xiang ; Fan Yaobo
刊名	WATER SCIENCE AND TECHNOLOGY
	2014
卷号	69 期号:9 页码:1846-1852
关键词	airlift external circulation membrane bioreactor computational fluid dynamics height of gas-liquid mixing zone H circulating pipe
ISSN号	0273-1223
中文摘要	The airlift external circulation membrane bioreactor (AEC-MBR) is a new MBR consisting of a separated aeration tank and membrane tank with circulating pipes fixed between the two tanks. The circulating pipe is called a H circulating pipe (HCP) because of its shape. With the complex configuration, it was difficult but necessary to master the AEC-MBR's hydraulic characteristics. In this paper, simulation and optimization of the AEC-MBR was performed using computational fluid dynamics. The distance from diffusers to membrane modules, i.e. the height of gas-liquid mixing zone (h(m)), and its effect on velocity distribution at membrane surfaces were studied. Additionally, the role of HCP and the effect of HCP's diameter on circulation were simulated and analyzed. The results showed that non-uniformity of cross-flow velocity existed in the flat-plate membrane modules, and the problem could be alleviated by increasing hm to an optimum range (h(m)/B >= 0.55; B is total static depth). Also, the low velocity in the boundary layer on the membrane surface was another reason for membrane fouling. The results also suggested that HCP was necessary and it had an optimum diameter to make circulation effective in the AEC-MBR.
WOS记录号	WOS:000338989800009
公开日期	2015-03-24
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/9454]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Zhang Qing,Xu Rongle,Zheng Xiang,et al. Simulation and optimization of airlift external circulation membrane bioreactor using computational fluid dynamics[J]. WATER SCIENCE AND TECHNOLOGY,2014,69(9):1846-1852.
APA	Zhang Qing,Xu Rongle,Zheng Xiang,&Fan Yaobo.(2014).Simulation and optimization of airlift external circulation membrane bioreactor using computational fluid dynamics.WATER SCIENCE AND TECHNOLOGY,69(9),1846-1852.
MLA	Zhang Qing,et al."Simulation and optimization of airlift external circulation membrane bioreactor using computational fluid dynamics".WATER SCIENCE AND TECHNOLOGY 69.9(2014):1846-1852.