DOF(Dissolved Ozone Flotation) 시스템을 이용한 하수처리장 방류수의 고도처리에 대한 연구

Advanced Secondary Wastewater Treatment Using the DOF (Dissolved Ozone Flotation) System

  • 이병호 (울산대학교 건설환경공학부) ;
  • 김상희 (울산대학교 건설환경공학부)
  • 투고 : 2005.09.02
  • 심사 : 2005.12.01
  • 발행 : 2005.12.15

초록

The DOF (Dissolved Ozone Flotation) system was used to treat the effluent of the secondary wastewater treatment plant. The DOF system uses ozone instead of air, while DAF (Dissolved Air Flotation) uses air. Moreover, since the solubility of ozone is higher than air, the DOF system produces larger volume of micro-bubbles than the DAF system does. Thus, the DOF system performs better than the DAF system in floating ability. The DOF system could remove 70% of turbidity to an average of 0.59NTU in effluent from 2.31NTU in influent. The removal efficiency of absorbance measured with UV-254 in the effluent of the DOF system was 63%, while only 19% was removed by the DAF system. the DOF system removed 84% of the color from 25~26CU to 4CU, while DAF system removed 42% of the color to 15 CU. The CODMn removal efficiency of the DOF system was 34%, 6.8mg/l of effluent $COD_{Mn}$ concentratin, while it was 20%, 8.3mg/L of effluent $COD_{Mn}$ concentratin, to use the DAF system. Microbial bacteria such as coliform bacteria, and heterotrophic bacteria were removed over 99% by the DOF system, and 42~45% by the DAF system. That is, Microbial bacteria were almost completely destroyed by the DOF system. To sum up with, the DOF system was found to be very effective to treat effluent of the wastewater treatment plant.

키워드

참고문헌

  1. 강준원, 구자용, 최승일, 정재춘, 육운수 공역 (2004) 오존을 이용한 수처리 기술. 동화기술
  2. 곽동희, 김성진, 임영환 (2004) 용존공기부상(DAF) 공정을 이용한 생물학적 플록의 부상분리. 상하수도학회지. 18(5), pp.649-655
  3. 독고석, 한무영, 박중현 (1998) 용존공기부상법(DAF)에서 미세기포의 제타전위측정. 상하수도학회지, 12(4), pp.53-58
  4. 독고석, 한무영, 박중현, 남기진 (1999) 용존공기부상법(DAF)에서 미세기포와 입자간 충돌이론의 실험적 증명. 한국물환경학회지, 15(2), pp.185-192
  5. A.M. Amat, A. Arques, M.A. Miranda, and Lopez (2005) Use of ozone and/or UV in treatment of effluents from board paper industry. Cbemospbere 60, pp. 1111-1117
  6. Devendra P. Saroj, Arun Kumar, Pumendu Bese, Vinod Tare, and Yasbodhan Dhopavkar (2005) Mineralization of Some Nantural Refractory Organic Compounds by Biodegradation and Ozonation. Water Research 39, pp. 1921-1933 https://doi.org/10.1016/j.watres.2005.03.020
  7. HPHA, AWWA, WPCF (1989) Standard Methods for the Examination of Water and Wastewater, 17th edition
  8. Roberto Andreozzi, Marisa Canterino, Raffaele Marotta, and Nicklas Paxeus (2005) Antibiotic Removal from Wastewater: the ownation of amoxicillin. Jour. of Hazardous Materials 122, pp 243-250 https://doi.org/10.1016/j.jhazmat.2005.03.004
  9. Rui Wang, Chen-Loung Chen, and Josef S. Gratzl (2005) Dechlorination of Chlorophenols Found in Pulp Bleach Plant E-l Effluents by Advanced Oxidation Process. Bioresource Technology 96, pp 897-906 https://doi.org/10.1016/j.biortech.2004.08.011