CROSSFLOW MICROFILTRATION OF CHLORELLA SP. SUSPENSIONS

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题名:	CROSSFLOW MICROFILTRATION OF CHLORELLA SP. SUSPENSIONS
作者:	Hwang, Kuo-Jen;Chou, L.L.
贡献者:	淡江大學化學工程與材料工程學系
日期:	2013-08
上传时间:	2014-03-12 15:47:45 (UTC+8)
出版者:	Whitwick: The Filtration Society
摘要:	A kind of algae, Chlorella sp., is concentrated using plane-sheet crossflow microfiltration in this study. The Chlorella sp. cells with sizes ranging from 3 to 12 µm were filtered using a 0.1 µm membrane made of mixed cellulose ester. The effects of operating conditions, such as crossflow velocity and trans-membrane pressure, on the filtration flux and cake properties were measured and are discussed. The filtration flux increased with increasing crossflow velocity and trans-membrane pressure. The overall filtration resistance is mainly contributed by the cake formed from the algae cells. The order of magnitude of the average specific filtration resistance of cake formed by Chlorella sp. is as high as 1013 m-1, and the cake compressibility is ca. 0.74. An increase in crossflow velocity led to higher wall shear stress which resulted in reduced cake mass. A force balance model for cell deposition is applied to obtain the relationship between cake mass and operating conditions. The cake mass decreases linearly with the ratio of wall shear stress to filtration flux. The filtration flux can be estimated using the basic filtration equation once the cake mass and filtration resistance are analysed. The calculated results of filtration flux agree fairly well with experimental data.
關聯:	Filtration 13(3), pp.185-192
显示于类别:	[化學工程與材料工程學系暨研究所] 期刊論文

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