Treatment of textile wastewater using combined anaerobic moving bed biofilm reactor and powdered activated carbon-aerobic membrane reactor

Kozak M., Cirik K., Basak S.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, vol.9, no.4, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 9 Issue: 4
  • Publication Date: 2021
  • Doi Number: 10.1016/j.jece.2021.105596
  • Title of Journal : JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
  • Keywords: MBBR, Kaldnes, Textile wastewater, PAC-AeMBR, START-UP, AZO-DYE, BIOLOGICAL TREATMENT, MICROBIAL COMMUNITY, BIOREACTOR, REMOVAL, BIODEGRADATION, TECHNOLOGIES, CARRIER, SLUDGE

Abstract

In this study, treatment of textile wastewater using sequencing anaerobic moving bed biofilm reactor (AnMBBR) and powdered activated carbon - aerobic membrane bioreactor (PAC-AeMBR) was investigated. MBBR was composed by an anaerobic bioreactor with a biocarrier K1 with a filling ratio of 40% (v:v) and operated with 5 different aeration rates (0-0.55 m(3)air/m(3)reactor.min), at a constant HRT of 6 h to evaluate the effect of oxygen on AnMBBR system. The AnMBBR effluent was fed to the PAC-AeMBR for further treatment. In the AnMBBR operation, the adverse effect of aeration on anaerobic color removal was observed when ORP values increased over - 300 mV corresponding to aeration rates over 0.019 m(3)air/m(3)reactor.min, showing high toleration of biofilm layer. Limited aerated MBBR pretreatment provided long-term operation of MBR by decreasing frequency of membrane fouling. The relative abundance of EPS-producing bacteria namely Alphaproteobacteria (68%) was remarkably high in PAC-AeMBR. Considering the obtained results, it was concluded that the AnMBBR and PAC-AeMBR systems with high removals presented itself as a stable system.