Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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A study on the Development and Evaluation of Sludge Occlusion Reduced Diffuser

폐색 저감형 산기관의 개발 및 적용성 평가

  • 김영훈 (성균관대학교 건설환경시스템공학과) ;
  • 김관엽 (포스코건설 녹색환경연구그룹 기술연구소/R&D CENTER) ;
  • 이의종 (성균관대학교 건설환경시스템공학과) ;
  • 남종우 (성균관대학교 건설환경시스템공학과) ;
  • 이창하 (성균관대학교 건설환경시스템공학과) ;
  • 전민정 (성균관대학교 건설환경시스템공학과) ;
  • 김형수 (성균관대학교 건설환경시스템공학과)
  • Published : 2011.02.15
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Abstract

The diffuser which is conventionally adapted to MBR, has problem that decreasing the cleaning effect of membrane module by inflexible air supply due to the occlusion of sludge from diffuser hole. To solve this problem, diffuser structure of submerged module should be improved to discharge sludge which is flow into the diffuser for prevent occlusion in the diffuser. In this study, the structure of the diffuser was reformed to open lower part for preclusion the blocking. And the outlet diameter of the diffuser was drawn through the condition for the depth of water and air rate, to prevent air-leak condition of improved diffuser. Moreover, application is evaluated by comparing test with occlusion effect of the conventional and improved diffuser. From the results, air-water boundary changes are steady with changes of water depth and it shows linear relation about air rate. By using this linear numerical formula, the height of diffuser's outlet can be decided. Also, it displays that it can prevent the occlusion effect during the comparing test. Hereafter, if this diffuser is applied to practical MBR process, the occlusion problem of diffuser will be disappeared.

Keywords

References

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