Integrating Membrane Filtration and a Fluidized-bed Pellet Reactor FOR Hardness Removal
學年 93
學期 1
出版(發表)日期 2004-08-01
作品名稱 Integrating Membrane Filtration and a Fluidized-bed Pellet Reactor FOR Hardness Removal
作品名稱(其他語言)
著者 李奇旺; Li, Chi-wang; Jian, Jau-Cheng; Liao, Jung-Chih
單位 淡江大學水資源及環境工程學系
出版者 American Water Works Association
著錄名稱、卷期、頁數 American Water Works Association. Journal 96(8), pp.151-158
摘要 Fluidized-bed pellet reactor technology was developed to remove water hardness with minimal sludge production. Operation procedures of this process include adding pellets into a column reactor and directing raw water and chemicals through the bottom of the column, keeping pellets fluidized to prevent them from being coagulated. In this study a process combining an ultrafiltration (UF) membrane with outside-in flow configuration and a fluidized-bed pellet reactor was proposed for hard water softening. The advantages of such a process include a compact reactor footprint, high treatment efficiency, and excellent effluent quality. Three different pellets of various sizes were used: quartz sand, beach sand, and heated iron oxide particles (HIOPs). Results show that with a removal efficiency of less than 16%, a UF membrane alone is not an effective process for removing hardness due to the slow reaction kinetic of calcium carbonate precipitation without the presence of pellets. When three types of pellets were added separately, the removal efficiency of the integrated UF/pellet process was more than 60% at a pH level of 9.0. Hardness removal efficiency improved with increasing pH and pellet surface area, and no significant membrane fouling was observed during the experiments.
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語言 en
ISSN 0003-150X 2164-4535
期刊性質 國外
收錄於 SCI EI
產學合作
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審稿制度
國別
公開徵稿
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