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ENHANCED COAGULATION: DETERMINATION OF CONTROLLING CRITERIA AND AN EFFECT ON TURBIDITY REMOVAL
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  • Journal title : Environmental Engineering Research
  • Volume 10, Issue 3,  2005, pp.105-111
  • Publisher : Korean Society of Environmental Engineering
  • DOI : 10.4491/eer.2005.10.3.105
 Title & Authors
ENHANCED COAGULATION: DETERMINATION OF CONTROLLING CRITERIA AND AN EFFECT ON TURBIDITY REMOVAL
Kim, Seung-Hyun;
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 Abstract
The applicability of the USEPA`s (United States Environmental Protection Agency) three criteria of enhanced coagulation (criterion 1-TOC level less than 2 mg/l. before chlorination; criterion II-% requirement of TOC removal; criterion III-point of diminishing return) for Korean waters was evaluated in this study. This study also investigated an effect of enhanced coagulation on turbidity removal, and attempted to identify the best coagulant for enhanced coagulation. Three different waters were used in this study: one river water and two lake waters. five different coagulants were used: alum, liquid alum, PACl, ferric chloride with and without water. Results of this study showed that all three criteria were achievable for the tested waters. For these waters, controlling criterion was found to be different depending upon raw water characteristics. When initial Toe level was low(< 4 mg/L), criterion I (< 2 mg/L) could be the controlling criterion. As TOC level increased, criterion II (% TOC removal) became the controlling criteria. It was possible to achieve different goals of turbidity and TOC removals. Although the optimum region of TOC removal was more acidic than that of turbidity removal, there was no conflict between these two removals. The best coagulant was found to be different depending upon the evaluation tool: maximum and optimum removal. ferric chloride was more effective than alum in terms of the maximum TOC removal, while Al-based coagulant such as alum or PACl was the best coagulant in terms of the optimum TOC removal.
 Keywords
enhanced coagulation;controlling criteria;turbidity removal;best coagulant;optimum TOC removal;
 Language
English
 Cited by
1.
CONTROL OF DIATOM BY PREOXIDATION AND COAGULATION IN WATER TREATMENT,;;;;

Environmental Engineering Research, 2006. vol.11. 1, pp.45-53 crossref(new window)
2.
한강원수 자연유기물의 특성분석 및 강화응집 기준 평가,정영미;권지향;이상협;

상하수도학회지, 2007. vol.21. 6, pp.653-661
3.
Application of Response Surface Method as an Experimental Design to Optimize Coagulation Tests,;;

Environmental Engineering Research, 2010. vol.15. 2, pp.63-70 crossref(new window)
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