Improved phenol degradation in high-phenol-fed MBR by membrane-driven containment of non-settling biodegradation microbes

Soojeung Ahn, Insang Song, Younkyoo Choung, Joonhong Park

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Phenol is one of major pollutants in industrial wastewater with high remediation priority. In this study, the role of membrane in phenol degradation in high-phenol-fed MBR (membrane bioreactor) was explored. Phenol elimination in high-phenol-fed MBRs resulted in complete mineralization and the high-phenol-fed MBR exhibited greater biomass-specific phenol removal rates (0.4-1.5 mg phenol/(mgVSS·d) than the low-phenol-fed MBR. In the high-phenol-fed MBR, filamentous non-settling microbes were more abundant than in the low-phenol-fed MBR. In the following batch experiment, high-acclimated and non-settling microbes were separately collected from the high-phenol-acclimated bioreactor, and their specific phenol degradation was determined at 5.1 mg phenol/(mgVSS·d). The greater specific phenol degradation rate of the non-settling microbes than the observed phenol elimination rate in the high-phenol-fed MBR indicates that the high-phenol-acclimated and non-settling microbes had greater degradation activity than the rest of sludge microbes in the bioreactor. According to these findings, the role of membrane in the high-phenol-fed MBR was identified as the containment of non-settling and biodegradative microbes in bioreactor, and in turn, the membrane-driven increase of non-settling phenol degrading microbes enhanced phenol elimination in the high-phenol-fed MBR.

Original languageEnglish
Pages (from-to)320-325
Number of pages6
JournalDesalination and Water Treatment
Volume31
Issue number1-3
DOIs
Publication statusPublished - 2011 Jul

All Science Journal Classification (ASJC) codes

  • Water Science and Technology
  • Ocean Engineering
  • Pollution

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