Evaluation of textile wastewater treatment in sequential anaerobic moving bed bioreactor-aerobic membrane bioreactor


Kozak M., Cirik K., Dolaz M., Basak S.

PROCESS BIOCHEMISTRY, vol.105, pp.62-71, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 105
  • Publication Date: 2021
  • Doi Number: 10.1016/j.procbio.2021.03.013
  • Title of Journal : PROCESS BIOCHEMISTRY
  • Page Numbers: pp.62-71
  • Keywords: Anaerobic moving bed bioreactorr, Aerobic membrane reactor, Real textile wastewater, Alphaproteobacteria, Silicon, BIOFILM REACTOR, GREEN SYNTHESIS, DRUG RESIDUE, AZO-DYE, REMOVAL, PERFORMANCE, ADSORBENT, SLUDGE, THERMODYNAMICS, NITRIFICATION

Abstract

In this study, the treatability of real textile wastewater [dissolved organic carbon (DOC): 500 mg/L), color: 6383 Pt-Co, sulfate: 362 mg/L)] was investigated in sequential anaerobic moving bed bioreactor (AnMBBR) and aerobic membrane bioreactor (AeMBR). AnMBBR was filled with 40 % career material (Kaldnes K1). The effect of different hydraulic retention times (HRTs) (6-48 h) and powdered activated carbon (PAC) addition (1 g/L) was investigated for system optimization. Sequential AnMBBR- AeMBR was successfully operated for textile wastewater treatment corresponding to 92 %, and 90 % dissolved organic carbon (DOC) and color removals, respectively. The effluent quality, dropped under 45 Pt-Co and 18 mg/L effluent values, was relatively high and complianted with discharge standards. The Fourier transform infrared spectroscopy (FT-IR) analysis showed that primary amines are successfully removed in AeMBR effluent. Fouling in AeMBR was increased when HRT was reduced, however, improved by 90 % at PAC addition conditions. Except for soluble microbial products (SMP) and soluble extracellular polymeric substances (EPS), it was observed that silicon (Si) (13.16 %) has an important role in fouling which was confirmed by scanning electron microscopy (SEM) and Energy-Dispersive X-ray (EDX) analysis. Additionally, microbial community structures indicated that the membrane fouling can be caused by Alphaproteobacteria (80 %) which was the dominant culture in the biofilm layer at a maximum fouling rate.