Reduction of membrane fouling by simultaneous upward and downward air sparging in a pilot-scale submerged membrane bioreactor treating municipal wastewater

Hee Deung Park, Young Haeng Lee, Hyun Bae Kim, Jihee Moon, Chang Hyo Ahn, Keon Tae Kim, Moon Sun Kang

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

A vertically oriented hollow fiber membrane module equipped with a downward aerator as well as an upward aerator for the simultaneous upward and downward air sparging was evaluated in a pilot-scale bioreactor. The operation was divided into three consecutive phases based on different membrane air sparging configurations: the simultaneous upward and downward air sparging (Phase 1), the single upward air sparging (Phase 2), and the simultaneous upward and downward air sparging (Phase 3). Although the SMBR operation, process performances including particulate matters, organic matters, and nutrients removals were stable, the membrane fouling characteristics were significantly different for the different air sparging configurations. The parameters such as the trans-membrane pressure increasing rate, the permeability decreasing rate, the irreversible membrane fouling rate, and the fouling resistance increased when the air sparging configuration was changed from the simultaneous upward and downward mode to the single upward mode (i.e., Phase 1→Phase 2), while the parameters decreased when the air sparging configuration was switched from the single upward mode to the simultaneous upward and downward mode (i.e., Phase 2→Phase 3). Taken together the results strongly support the effectiveness of the simultaneous upward and downward membrane air sparging in reducing membrane fouling.

Original languageEnglish
Pages (from-to)75-82
Number of pages8
JournalDesalination
Volume251
Issue number1-3
DOIs
Publication statusPublished - 2010 Feb

Keywords

  • Dual header membrane module
  • KIMAS-20
  • Membrane fouling
  • Simultaneous upward and downward air sparging
  • Submerged membrane bioreactor (SMBR)

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering

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