Characteristics of an A2O-MBR system for reclaimed water production under constant flux at low TMP

Yisong Hu, Xiaochang C. Wang, Yongmei Zhang, Yuyou Li, Hua Chen, Pengkang Jin

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

A full scale anaerobic-anoxic-oxic (A2O) biological unit followed by a submerged MBR was applied for domestic wastewater treatment and reclaimed water production. Under a constant flux of 16L/m2h, TMP varied narrowly between 12 and 22KPa over the duration of 9 months with only enhanced flux maintenance (EFM) for restoring membrane permeability. By analyzing the particle size distribution (PSD) and extracellular substances (EPS) in the mixed liquor at different steps, it was found that fine particles, proteins and polysaccharides, as potential foulants, decreased along the A2O-MBR array. Fluorescent excitation-emission matrix (3DEEM) analysis further revealed the characteristics of dissolved organic substances throughout the treatment process. Nevertheless, the deposition of organic foulants was identified in the cake layer on the membrane surface by scanning electron microscopy and Fourier transform infrared spectroscopy. The advantage of the A2O-MBR system over the conventional MBR was not only in the effectiveness for high quality reclaimed water production, but also in the reduction of potential foulants through the A2O biological process prior to entering the MBR unit.

Original languageEnglish
Pages (from-to)156-162
Number of pages7
JournalJournal of Membrane Science
Volume431
DOIs
Publication statusPublished - 2013 Mar 15

Keywords

  • AO-MBR process
  • Domestic wastewater
  • Extracellular polymeric substances
  • Membrane foulant
  • Reclaimed water production

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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