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Effect of pH Control, Ozonation and Coagulation on THMs Formation in Dringking Water Treatment Process of the Downstream of Nakdong River
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낙동강 하류의 정수처리 공정에서 pH, 오존 및 응집이 트리할로메탄 생성에 미치는 영향

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Type
Academic journal
Author
Jeong-Kyu Lee (부산시) Hee-Jong Son (부산시) Sang-Goo Kim (부산시) Young-Do Hwang (부산시) Dong-Choon Ryu (부산시)
Journal
Korean Society Of Environmental Engineers Journal of Korean Society of Environmental Engineers Vol.39 No.3 KCI Accredited Journals
Published
2017.3
Pages
105 - 111 (7page)

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Effect of pH Control, Ozonation and Coagulation on THMs Formation in Dringking Water Treatment Process of the Downstream of Nakdong River
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This study was conducted to evaluate the effects of pH control and ozonation, coagulation on trihalomethanes (THMs) formation during prechlorination of the Nakdong river water. The results showed that lower pH was reduced THMs formation during prechlorination. THMs formation of water lowered pH 9.5 to 9.0, was reduced 18.3% and lowered pH 9.0 to 8.0 was reduced 14%, lowered pH 8.0 to 7.0 was reduced 7%, lowered pH 9.5 to 8.0 was reduced 29%. A low ozone dose (0.11~0.48 mg･O3/DOC) before chlorination reduced the yields of THMs (reduced 6~24% in chlorination) compared with no preozonation. Thus the low ozone dose pretreatment is relatively effective plan to reduce THMs formation during chlorination. When ozone 1.0 mg/L, Alum 40 mg/L and sulfuric acid 6 mg/L dosed, The yields of THMs formation was reduced 42% compared with only chlorination. Input of chlorine after preozonation (followed coagulation, pH control) is more effective than only decline pH at a intake station to control THMs formation in a water treatment process. When chlorine 2.5 mg/L was added before coagulation (alum 40 mg/L), THMs formation was reduced 19% by lower pH and decreased 18% by a natural organic matter (NOM) removal compared with only chlorine 2.5 mg/L addition. Because coagulation could induce simultaneously lower pH and NOM removal, THM formation concentration is more effectively lowed than decreasing pH in the Nakdong river water.
#응집 #THM Formation #pH Control #Coagulation #Ozonation #Drinking Water Treatment #Nakdong River #THM 생성 #pH 조절 #오존처리 #정수처리 #낙동강

Contents

Abstract
요약
1. 서론
2. 실험 재료 및 방법
3. 결과 및 고찰
4. 결론
References

References (22)

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[학술지(정기간행물)] - Liang, L. / 2003 / Factors influencing the formation and relative distribution of haloacetic acids and trihalomethanes in drinking water / Environ. Sci. Technol. 37 (13) : 2920 ~ 2928 google schola [학술지(정기간행물)] - Shan, J. / 2011 / The effects of pH, bromide and nitrate on halonitromethan and trihalomethane formation from amino acids and amino sugars / Chemosphere 86 : 323 ~ 328 google schola [학술지(정기간행물)] - Bond, T. / 2014 / Examining the interrelationship between DOC, bromide and chlorine dose on DBP formation in drinking water - a case study / Sci. Total Environ. 470-471 : 469 ~ 479 google schola [단행본] - Kristiana, I. / 2012 / Disinfection By-Products and Human Health / International Water Association Publishing : 11 ~ 39 google schola [학술지(정기간행물)] - 손희종 / 2005 / 활성탄 공정에서의 염소 소독부산물 제거특성(050525-050719) / 대한환경공학회지 27 (7) : 762 ~ 770 dbpia

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