標題: Pre-Treatment of Natural Organic Matters Containing Raw Water using Coagulation
作者: Cheng, Ya-Ling
Wong, Ruei-Jyun
Lin, Justin Chun-Te
Huang, Chihpin
Lee, Duu-Jong
Lai, Juin-Yih
環境工程研究所
Institute of Environmental Engineering
關鍵字: charge neutralization;coagulant;mechanism;organic matters
公開日期: 2010
摘要: Coagulation is a commonly adopted process as a pretreatment step for minimizing membrane fouling. Three coagulants, polyaluminum chloride (PACl), alum, and FeCl3 were tested under four mixing-settling schemes for turbidity and natural organic matters (NOM) removal. The organic matters in the raw waters were fractionated by high performance size exclusion chromatography (HP-SEC) system and were characterized using the excitation-emission matrix (EEM) fluorescence spectra. Sufficient rapid mixing and slow mixing or applying two-stage coagulation benefit turbidity removal using PACl or FeCl3 under oelectrostatic patch coagulationo (EPC) mechanism. The EPC mechanism is not efficient for alum coagulation. At higher coagulant doses, the NOM removal is not affected by mixing condition. Intensive rapid mixing alone benefits NOM removal using PACl or FeCl3. Alum is a poor coagulant for NOM removal under EPC mechanism.
URI: http://hdl.handle.net/11536/6081
http://dx.doi.org/10.1080/01496391003666890
ISSN: 0149-6395
DOI: 10.1080/01496391003666890
期刊: SEPARATION SCIENCE AND TECHNOLOGY
Volume: 45
Issue: 7
起始頁: 911
結束頁: 919
顯示於類別:期刊論文


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