Performance evaluation of conventional membrane bioreactor and moving bed membrane bioreactor for synthetic textile wastewater treatment

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Sarı Erkan H., Çağlak A., Soysaloglu A., Takatas B., Onkal Engin G.

JOURNAL OF WATER PROCESS ENGINEERING, vol.38, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 38
  • Publication Date: 2020
  • Doi Number: 10.1016/j.jwpe.2020.101631
  • Journal Name: JOURNAL OF WATER PROCESS ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Conventional membrane bioreactor, Moving bed-membrane bioreactor, Biocarriers, textile industry wastewater, Fouling, Color removal, ACTIVATED-SLUDGE, DYE, MBR, DEWATERABILITY, CARRIERS, COAGULATION/FLOCCULATION, COMBINATION, INDUSTRY, IMPACT
  • Yıldız Technical University Affiliated: Yes

Abstract

In this study, conventional membrane bioreactor (MBR) and moving bed-membrane bioreactor (MB-MBR) processes were compared in synthetic textile wastewater treatment. For this purpose, the bioreactors were operated as a conventional MBR, an MB-MBR with a biocarrier filling ratio of 20 % and an MB-MBR with a biocarrier filling ratio of 10 %, respectively. In the conventional MBR operation, 93.1 % chemical oxygen de mand (COD) and 87.1 % color (Reactive Red 390) removal efficiencies were obtained. In both MB-MBR operations, almost equal COD and color removal efficiencies were found as 98.5 % and 89.5 %, respectively. Moreover, offline physical and chemical membrane cleaning processes were applied every other day and every 15 days throughout the conventional MBR operation, respectively, while no physical or chemical membrane cleaning was required during both MB-MBR operations. Furthermore, lower polysaccharide concentrations of extracellular polymeric substances (EPS) and floc sizes of sludge and higher zeta potential of sludge were determined in MB-MBR. Considering the obtained results, it may be stated that the MB-MBR process is an attractive treatment technology for reducing membrane fouling propensity for treatment of textile wastewater.