Membrane fouling in thermophilic aerobic membrane distillation bioreactor treating hospital wastewater

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İnce E., İnce M., Yaşar H., Uslu Y. A.

Water SA, cilt.48, sa.4, ss.467-475, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 48 Sayı: 4
  • Basım Tarihi: 2022
  • Doi Numarası: 10.17159/wsa/2022.v48.i4.3930
  • Dergi Adı: Water SA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, Communication Abstracts, Compendex, Food Science & Technology Abstracts, Geobase, Metadex, Pollution Abstracts, Veterinary Science Database, Directory of Open Access Journals, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.467-475
  • Anahtar Kelimeler: membrane distillation, bioreactor, membrane fouling, SEM, FTIR, EDX, EXTRACELLULAR POLYMERIC SUBSTANCES, ACTIVATED-SLUDGE, SURFACE-PROPERTIES, PERFORMANCE, SYSTEM, BIOFLOCCULATION, RETENTION, STABILITY, EFFLUENT, DESIGN
  • Kocaeli Üniversitesi Adresli: Hayır

Özet

© The Author(s).In the membrane distillation bioreactor (MDBR) process, flux increases with increasing feed temperature, but the presence of microorganisms limits the feed temperature. Also, the accumulation of cells and other substances on the membrane surface can affect the efficiency of MDBR. In this study, hospital wastewater was treated by thermophilic activated sludge MDBR. In the MDBR, the initial flux was 7.87 L·m−2·h −1 and the stable flux was 3.88 L·m−2·h −1. The particle size, zeta potential and hydrophobicity of the activated sludge in MDBR were 2.25 µm, −14 mV and 24%, respectively. In addition, EPS (extracellular polymeric substances) and SMP (soluble microbial products), having a significant effect on membrane fouling, were determined to be 201.50 mg·L−1 and 669.35 mg·L−1 in MDBR, respectively. Contact angle, FTIR (Fourier transform infrared), SEM (scanning electron microscope) and EDX (energy dispersive X-ray spectroscopy) measurements were also made on a virgin membrane and used membrane. Analysis of EDX, SEM and F-TIR showed that the membrane fouling was caused by CaCO3 and EPS.