Browse > Article
http://dx.doi.org/10.5322/JES.2002.11.9.955

Effects of Recycled Washwater on Pollutant Removal and Particle Characteristics during Coagulation  

문병현 (창원대학교 환경공학과)
김승현 (경남대학교 공간환경시스템공학부)
박미선 (창원대학교 환경공학과)
이향인 (창원대학교 환경공학과)
이강춘 (동의대학교 환경공학과)
Publication Information
Journal of Environmental Science International / v.11, no.9, 2002 , pp. 955-960 More about this Journal
Abstract
The recycled washwater, which has different water quality and is produced about 5 to 20% of the total water volume treated, affects the unit operation of water treatment, especially coagulation process. However, the effects of recycled washwater on unit operation of water treatment have not been fully investigated. In this study, effects of recycled washwater on coagulation process were investigated to find the optimum coagulation condition by analyzing turbidity, $UV_{254}$, TOC removal efficiencies. In addition, effects of recycled washwater on residual Al after coagulation were studied by analyzing soluble and particulate Al. The size distribution and fractal dimension of coagulated also analyzed. The recycled washwater was lower pH than the raw water. And the recycled washwater had higher $UV_{254}$, TOC and residual Al concentration than the raw water. Residual Al concentration of recycled washwater was about 50 times higher than that of raw water. Optimum coagulant dosages on the blending recycled washwater and the raw water for turbidity, $UV_{254}$ and Al removal were lower than that on the raw water. However, TOC removal increased by increasing coagulant dosage. The size and fractal dimension of coagulated particle produced in the blending recycled washwater were larger, which imply faster settling velocity, than those produced in the raw water only.
Keywords
Recycling Water; Coagulation; Turbidity; TOC; Al; Particle Size; Fractal dimension;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Waite, T. D., 1999, Measurement and implications of floc structure in water and wastewater treatment, Colloids and Surfaces A : Physicochem. Eng. Aspects, 151, 27-41.   DOI   ScienceOn
2 한무영, 이재원, 1997, 회수수가 정수장 응집공정에 미치는 영향, 대한토목학회 학술발표회, 519-522.
3 Guan, J., T. D. Waite, and R. Amal, 1998, Rapid structure characterization of bacterial aggregates, Environ. Sci. Technol., 32(23), 3735-3742.   DOI   ScienceOn
4 고영송, 남상호, 1994, 응집처리시 잔류알루미늄의 농도와 플록의 특성, 한국수질보전학회지, 10(4), 435-442.
5 Kim, S. H. and C. H. Yoon, 2000, Reducing residual aluminum concentration at water treatment plant by improving filtration performance, Environmental Engineering Research, 5(4), 207-212.
6 ASCE, AWWA, 1998, Water Treatment Plant Design, 3rd. Ed., McGraw- Hill.
7 환경부, 1997, 기존 정수장 효율향상기술, 제2단계 2차년도 연차보고서, 한국수자원공사.
8 Kawamura, S., 1991, Integrated design of water treatment facilities, John Wiley & Sons, Inc.