AI(III), Fe(III)계 응집제의 인 제거 특성 및 플럭의 가시화

이상화; 이규석; 강익중; 윤현희; 함승주; 곽종운; Sang-Wha Lee; Ku-Suk Lee; Ik-Joong Kang; Hyon-Hee Yoon; Seung-Joo Haam; Jong-Woon Kwak

Journal of the Korean Industrial and Engineering Chemistry, Vol.16, No.1, 74-80, February, 2005

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AI(III), Fe(III)계 응집제의 인 제거 특성 및 플럭의 가시화

Phosphorous Removal by Al(III) and Fe(III) Coagulants and Visualization of Flocs

이상화 ^†, 이규석, 강익중 , 윤현희 , 함승주 ¹, 곽종운²

경원대학교 화학생명공학과
¹연세대학교 화학공학과
²(주)에코노벨 기술연구소

Sang-Wha Lee^†, Ku-Suk Lee, Ik-Joong Kang , Hyon-Hee Yoon , Seung-Joo Haam¹, and Jong-Woon Kwak²

Department of Chemical & Bio Engineering, Kyungwon University, Kyeonggi 461-701, Korea
¹Department of Chemical Engineering, Yeonsei University, Seoul 120-749, Korea
²Econovel Co., Ltd., Seoul 152-050, Korea

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초록

탁질입자 및 인의 효과적인 제거 특성을 고찰하기 위해서 물리화학적 인자들(pH, 알칼리도, 응집제의 종류)의 체계적인 고찰을 수행하였다. AI(III)과 Fe(III)계 응집제들은 제타전위 값이 거의 영에 수렴하는 pH 7~9 영역에서 높은 탁도 제거율 및 인 제거율을 나타내었다. 응집제의 주입량이 증가함에 따라 탁도는 급격하게 감소하는 경향을 보였으며, 인의 경우에는 금속이온과의 당량적 결합에 기인하여 비례적으로 감소하였다. 고속카메라(Motion Scope 2000, Redlake Co.)를 이용하여 플럭의 생성과정을 가시화하였고 광학현미경을 통해서 플럭의 성상과 형태를 고찰하였다. Fe(III)계 응집제에 의해 생성된 플럭들은 Al(III)계 응집제에 의해 생성된 플럭들에 비해 치밀하였으며 침강성도 뛰어났다.

The effective removal of turbid-inducing particulates and algae-inducing phosphorous was systematically investigated by the variation of physico-chemical parameters such as pH, alkalinity, and coagulant types. Al(III)-based and Fe(III)-based coagulants exhibited high removal efficiency of turbidity and phosphorous at optimal pH ranges of 7~9, in which zeta potential nearly approached to zero. The removal rate of turbidity rapidly increased with the increase of coagulant dosages, whereas the removal rate of phosphorous gradually increased due to an equivalent reaction of phosphorous with metallicions. The generation of flocs during coagulation was visualized by high speed camera (Motion Scope 2000, Redlake Co.), and the images of singular flocs were captured by optical microscope. The flocs generated by Fe(III)-based coagulant was more compact than those induced by Al(III)-based coagulant, and the settlabiltiy of Fe(III)-induced flocs was superior to that of Al(III)-induced flocs.

Keywords:coagulant;turbidity;phosphorous;flocs;visualization

[References]

Kemira K, Handbook on Water Treatment, Helsinborg, Sweden (1993)
Stumm W, Morgan JJ, Aquatic Chemistry, 3rd ed. New York, John Willey & Sons (1996)
Kwak JW, Physico-Chemical Principle and Practice of Water Treatment, Yeigegak (1998)
Amirtharajah A, O'Melia CR, Coagulation Process: Destavilization, Mixing, and Flocculation, Water Quality and Treatment (4th ed.), AWWA., McGraw-Hill Inc. (1990)
Lee SW, Lee KS, Kwak JW, J. Korean Soc. on Water Quality, 18, 19 (2002)
Vymazal J, Algae and Element Cycling in Wetlands, ed. Lewis, Publisher (1995)
Petrovic M, Kastelan-Macan M, Water Sci. Technol., 34, 253 (1996)
Boisvert J, To TC, Berrak A, Jolicoeur C, Water Res., 31, 1939 (1997)
Edzwald GA, Amirtharajah A, J. Am. Water Works Assoc., 77, 50 (1985)
Kwak JW, Gillberg L, Asia-Pacific Regional Conference (6th IAWQ), Seoul (1997)
Drose RL, Theory and Practice of Water and Wastewater Treatment, John Wiley & Sons (1997)
Hsu P, Water Res., 10, 903 (1976)
Lee SW, Kwak JW, Kyungwon Periodicals, 15, 399 (1996)
Lee SW, Jang JH, Kwak JW, Asia-Pacific Regional Conference (6th IAWQ), Seoul (1997)
Lee SW, Lee KS, Heo JY, Kwak JW, J. Korean Soc. Environ. Eng., 22, 1495 (2000)

[Referenced By]

[Related Articles]

[1] Kemira K, Handbook on Water Treatment, Helsinborg, Sweden (1993)

[2] Stumm W, Morgan JJ, Aquatic Chemistry, 3rd ed. New York, John Willey & Sons (1996)

[3] Kwak JW, Physico-Chemical Principle and Practice of Water Treatment, Yeigegak (1998)

[4] Amirtharajah A, O'Melia CR, Coagulation Process: Destavilization, Mixing, and Flocculation, Water Quality and Treatment (4th ed.), AWWA., McGraw-Hill Inc. (1990)

[5] Lee SW, Lee KS, Kwak JW, J. Korean Soc. on Water Quality, 18, 19 (2002)

[6] Vymazal J, Algae and Element Cycling in Wetlands, ed. Lewis, Publisher (1995)

[7] Petrovic M, Kastelan-Macan M, Water Sci. Technol., 34, 253 (1996)

[8] Boisvert J, To TC, Berrak A, Jolicoeur C, Water Res., 31, 1939 (1997)

[9] Edzwald GA, Amirtharajah A, J. Am. Water Works Assoc., 77, 50 (1985)

[10] Kwak JW, Gillberg L, Asia-Pacific Regional Conference (6th IAWQ), Seoul (1997)

[11] Drose RL, Theory and Practice of Water and Wastewater Treatment, John Wiley & Sons (1997)

[12] Hsu P, Water Res., 10, 903 (1976)

[13] Lee SW, Kwak JW, Kyungwon Periodicals, 15, 399 (1996)

[14] Lee SW, Jang JH, Kwak JW, Asia-Pacific Regional Conference (6th IAWQ), Seoul (1997)

[15] Lee SW, Lee KS, Heo JY, Kwak JW, J. Korean Soc. Environ. Eng., 22, 1495 (2000)