전기응집/부상 공정에서 반응표면분석법을 이용한 TiO2 수용액의 탁도 처리조건 최적화
Optimization of the Turbidity Removal Conditions from TiO2 Solution using a Response Surface Methodology in the Electrocoagulation/Flotation Process
0
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
The removal of turbidity from TiO2 wastewater by an electrocoagulation/flotation process was studied in a batch reactor. The response surface methodology (RSM) was applied to evaluate the simple and combined effects of the three main independent parameters, current, NaCl dosage and initial pH of the TiO2 solution on the turbidity removal efficiency, and to optimize the operating conditions of the treatment process. The reaction of electrocoagulation/flotation was modeled by use of the Box-Behnken method, which was used for the fitting of a 2nd order response s urf ace model. T he a pplication o f RSM y ielded t he f ollowing r egression e quation, w hich i s an empirical relationship between the turbidity removal efficiency of TiO2 wastewater and test variables in uncoded unit: Turbidity removal (%) = 69.76 + 59.76Current + 11.98NaCl + 4.67pH + 5.00Current × pH − 160.11Current2 −0.34pH2. The optimum current, NaCl dosage and pH of the TiO2 solution to reach maximum removal rates were found to be 0.186 A, 0.161 g/l and 7.599, respectively. This study clearly showed that response surface methodology was one of the most suitable method to optimize the operating conditions for maximizing the turbidity removal. Graphical response surface and contour plots were used to locate the optimum point.
Abstract
The removal of turbidity from TiO2 wastewater by an electrocoagulation/flotation process was studied in a batch reactor. The response surface methodology (RSM) was applied to evaluate the simple and combined effects of the three main independent parameters, current, NaCl dosage and initial pH of the TiO2 solution on the turbidity removal efficiency, and to optimize the operating conditions of the treatment process. The reaction of electrocoagulation/flotation was modeled by use of the Box-Behnken method, which was used for the fitting of a 2nd order response s urf ace model. T he a pplication o f RSM y ielded t he f ollowing r egression e quation, w hich i s an empirical relationship between the turbidity removal efficiency of TiO2 wastewater and test variables in uncoded unit: Turbidity removal (%) = 69.76 + 59.76Current + 11.98NaCl + 4.67pH + 5.00Current × pH − 160.11Current2 −0.34pH2. The optimum current, NaCl dosage and pH of the TiO2 solution to reach maximum removal rates were found to be 0.186 A, 0.161 g/l and 7.599, respectively. This study clearly showed that response surface methodology was one of the most suitable method to optimize the operating conditions for maximizing the turbidity removal. Graphical response surface and contour plots were used to locate the optimum point.
참고문헌 (20)
- Golikova, E. V., "Electrosurface properties and aggregation stability of aqueous dispersion of TiO2 and ZrO2", Colloid Journal, 57(1), pp.25~29 (1995)
- Mathur, S., "Advanced in selective flocculation technology for solid-solid separations", International Journal of Mineral Processing, 58, pp.201~222 (2000)
- 허준무, "혐기성 연속 회분식 공정에 의한 도시하수슬러지 소화시 고액분리 특성에 따른 처리효율평가", 한국환경보건학회지, 28(5), pp.77~85 (2002), 한국환경보건학회
- Burns, S. E., "Microbubble generation for environmental and industrial separation", Separation and Purification Technology, 11, pp.221~232 (1997)
- 신민석, "전해부상을 이용한 Rutile TiO2제거 특성에 대한 연구", 대한환경공학회지, 24(1), pp.71~78 (2002), 대한환경공학회
- 박영식, "응집과 균질화가 팽화슬러지의 용존공기부상과 침전에 미치는 영향", 한국환경보건학회지, 33(1), pp.68~74 (2007), 한국환경보건학회
- Gao, P., "Removal of Chromium (VI) from wastewater b y combined e lectrocoagulation- electroflotation without a filter", Separation and Purification Technology, 43, pp.117~123 (2005)
- 박영식, "전기부상을 이용한 하수슬러지 농축", 한국환경과학회지, 16(9), pp.1085~1090 (2007), 한국환경과학회
- 조일형, "반응표면분석법을 이용한 염색폐수의 광촉매 산화 처리조건의 최적화", 수질보전 한국물환경학회지, 19(3), pp.257~270 (2003), 한국물환경학회
- 조일형, "Photo-Fenton 산화공정에서 반응표면분석법을 이용한 축산폐수의COD 처리조건 최적화 및 예측식 수립", 대한환경공학회지, 30(6), pp.642~652 (2008), 대한환경공학회
- Lee, S. B, "Design of experiments of focused on exercise using Minitab 15 version", pp.233~240 (2008), Ire Tech. Inc.
- Lim, Y. B, "Practical design of experiments", pp.1~15 (2008), Free Academy
- Lee, S. H, "Engineering statistics data analysis using Minitab", pp.715~732 (2008), Ire Tech. Inc.
- 송원용, "UV공정을 이용한 NDMA처리 통계적 최적화 연구", 수질보전 한국물환경학회지, 25(1), pp.96~101 (2009), 한국물환경학회
- 김달중, "전해부상에서의 TiO2 폐수처리에 대한 최적운전조건", 상하수도학회지, 15(1), pp.34~39 (2001), 대한상하수도학회
- Aleboyeh, A., "Optimization of C.I. Acid Red 14 azo dye removes by electrocoagulation batch process with response surface methodology", Chemical Engineering and Processing, 통권 : 47, pp.827~832 (2008)
- Mansour, L. B., "Treatment of wastewaters of paper industry by coagulation-electroflotation", Desalination, 208(1), pp.34~41 (2001)
- Wang, J. P., "Optimization of coagulation-flocculation process for a paper-recycling wastewater treatment using response surface methodology", Colloids and Surfaces A: Physicochemical and Engineering Aspects, 302(1), pp.204~210 (2007)
- Ölmez, T., "The optimization of Cr(VI) reduction and removal by electrocoagulation using response surface methodology", Journal of Hazardous Materials, 162(2), pp.1371~1378 (2009)
- Balasubramanian, N., "Arsenic removal through electrocoagulation: Kinetic and statistical modeling", Chemical Engineering Journal, 155(1), pp.76~82 (2009)