마이크로버블 오존 고도산화를 이용한 축산폐수 혐기소화 배출수의 COD와 색도의 제거

이인규; 이은영; 이혜정; 이기세; Inkyu Lee; Eunyoung Lee; Hyejung Lee; Kisay Lee

Applied Chemistry for Engineering, Vol.22, No.6, 617-622, December, 2011

Removal of COD and Color from Anaerobic Digestion Effluent of Livestock Wastewater by Advanced Oxidation Using Microbubbled Ozone

이인규 , 이은영¹, 이혜정¹, 이기세^{1, †}

전남대학교 생물과학⋅생명기술학과
¹명지대학교 환경생명공학과

Inkyu Lee , Eunyoung Lee¹, Hyejung Lee¹, and Kisay Lee^{1, †}

School of Biological Sciences and Biotechnology, Chonnam National University, Gwangju 500-757, Korea
¹Department of Environmental Engineering and Biotechnology, Myongji University, Kyongki 449-728, Korea

E-mail:

초록

축산폐수 혐기소화 유출수 중의 생물학적 난분해성 유기물의 분해를 위하여 오존 기반의 고도산화 기술을 적용하였다. 배출수의 COD 및 색도는 각각 9200∼9500 mg/L 및 0.384 (400 nm)이고 1/10 희석하여 실험에 사용하였다. 공급 오존은 버블의 크기가 13 μm인 마이크로버블 오존과 105 μm인 일반 오존버블과의 차이를 고찰하였다. 마이크로버블 오존을 사용함으로써 오존의 용해도와 라디칼 생성량이 증가되었고 일반 오존버블에 비하여 COD 및 색도의 제거효율이 각각 85% 및 26% 향상되었다. 마이크로버블을 포함한 O3/UV, O3/H2O2, O3/UV/H2O2의 조합을 비교한 결과 오존 단독 처리에 비하여 색도 제거율이 5∼10% 정도 증가되었으며, 오존에 비하여 UV나 H2O2의 색도제거에 대한 기여가 크지 않음을 알 수 있었다. 반면 COD에 대해서는 O3/UV/H2O2 적용시 오존 단독에 비하여 2배 이상 제거율이 증가하 였으며 UV보다는 H2O2의 기여도가 더 컸다. 한편 마이크로 오존의 사용시 증가된 용존오존 및 라디칼 활성으로 인하여 오존 공급을 중단한 후에도 UV 또는 H2O2를 적용함으로써 추가적인 COD 분해 효과를 지속적으로 유지할 수 있었다.

Ozone-based advanced oxidation was applied for the treatment of anaerobic digestion effluent of livestock wastewater. Initial COD and color value were 930 mg/L and 0.04, respectively, and the 1/10-diluted wastewater was used for the study. The treatment characteristics were compared between the conventionally generated ozone (105 μm) and microbubbled ozone (13 μm). The use of microbubbled ozone improved the removal of chemical oxygen demand (COD) and color by 85% and 26%, respectively, compared with the conventionally bubbled ozone. The application of microbubbled O3/UV, O3/H2O2, O3/UV/H2O2 combinations resulted in 5∼10% higher color removal than ozone alone, which implies that the contribution of UV or H2O2 is not significant in color removal. On the other hand, COD removal could be increased two folds compared with ozone alone through O3/UV/H2O2 combination. The contribution of H2O2 was bigger than UV for COD removal with microbubbled ozone. Due to the enhancement of dissolved ozone and radical activity, the microbubbling enabled us to additional COD removal even after stopping ozone supply in the presence of UV or H2O2.

Keywords:ozone;livestock wastewater;advanced oxidation;microbubble;COD;color

[References]

Oeller HJ, Demel I, Weinberger G, Water Sci. Technol., 35, 269 (1997)
Arslan I, Balcioglu IA, J. Chem. Technol. Biotechnol., 76(1), 53 (2001)
Tambosi JL, de Sena RF, Gebhardt W, Moreira R, Jose HJ, Schroder HF, Ozone Sci. Eng., 31, 428 (2009)
Gunten U, Water Res., 37, 1443 (2003)
Rosenfeldt EJ, Linden KG, Canonica S, von Gunten N, Water Res., 40, 3695 (2006)
Barker R, Jones AR, Ozone Sci. Eng., 10, 405 (1988)
Oneby MA, Bromley CO, Borchardt JH, Harrison DS, Ozone Sci. Eng., 32, 43 (2010)
Richardson SD, Thruston AD, Caughran TV, Chen PH, Collette TW, Floyd TL, Environ. Sci. Technol., 33, 3368 (1999)
Rakness KL, Ozone in Drinking Water Treatment : Process design, Operation, and Optimization, AWWA (2005)
Hoigne J, Bader H, Water Res., 17, 185 (1983)
Langlais B, Reckhow DA, Brink DR, Ozone in Water Treatment : Application and Engineering, Lewis (1991)
Legrini O, Oliveros E, Braun AM, Chem. Rev., 93, 671 (1993)
Tosik R, Wiktorowski S, Ozone Sci. Eng., 23, 295 (2001)
APHA, Standard Methods for the Examination of Water and Wastewater, 21st Ed, APHA (2009)
Bader H, Hoigne J, Water Res., 15, 449 (1982)
Majcherczyk A, Johannes C, Huttermann A, Appl. Microbiol. Biotechnol., 51(2), 267 (1999)
Reynolds TD, Richards PA, Unit Operations and Processes in Environmental Engineering, PWS (1996)
Talinli I, Anderson GK, Water Res., 26, 107 (1992)
Lee E, Lee H, Kim YK, Sohn K, Lee K, Int. J. Environ. Sci. Technol., 8, 381 (2011)
Lee CG, Kim MC, Appl. Chem. Eng., 21(6), 610 (2010)

[Referenced By]

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[1] Oeller HJ, Demel I, Weinberger G, Water Sci. Technol., 35, 269 (1997)

[2] Arslan I, Balcioglu IA, J. Chem. Technol. Biotechnol., 76(1), 53 (2001)

[3] Tambosi JL, de Sena RF, Gebhardt W, Moreira R, Jose HJ, Schroder HF, Ozone Sci. Eng., 31, 428 (2009)

[4] Gunten U, Water Res., 37, 1443 (2003)

[5] Rosenfeldt EJ, Linden KG, Canonica S, von Gunten N, Water Res., 40, 3695 (2006)

[6] Barker R, Jones AR, Ozone Sci. Eng., 10, 405 (1988)

[7] Oneby MA, Bromley CO, Borchardt JH, Harrison DS, Ozone Sci. Eng., 32, 43 (2010)

[8] Richardson SD, Thruston AD, Caughran TV, Chen PH, Collette TW, Floyd TL, Environ. Sci. Technol., 33, 3368 (1999)

[9] Rakness KL, Ozone in Drinking Water Treatment : Process design, Operation, and Optimization, AWWA (2005)

[10] Hoigne J, Bader H, Water Res., 17, 185 (1983)

[11] Langlais B, Reckhow DA, Brink DR, Ozone in Water Treatment : Application and Engineering, Lewis (1991)

[12] Legrini O, Oliveros E, Braun AM, Chem. Rev., 93, 671 (1993)

[13] Tosik R, Wiktorowski S, Ozone Sci. Eng., 23, 295 (2001)

[14] APHA, Standard Methods for the Examination of Water and Wastewater, 21st Ed, APHA (2009)

[15] Bader H, Hoigne J, Water Res., 15, 449 (1982)

[16] Majcherczyk A, Johannes C, Huttermann A, Appl. Microbiol. Biotechnol., 51(2), 267 (1999)

[17] Reynolds TD, Richards PA, Unit Operations and Processes in Environmental Engineering, PWS (1996)

[18] Talinli I, Anderson GK, Water Res., 26, 107 (1992)

[19] Lee E, Lee H, Kim YK, Sohn K, Lee K, Int. J. Environ. Sci. Technol., 8, 381 (2011)

[20] Lee CG, Kim MC, Appl. Chem. Eng., 21(6), 610 (2010)