Akademik Veri Yönetim Sistemi
JOURNAL OF WATER PROCESS ENGINEERING, cilt.31, 2019 (SCI-Expanded, Scopus)
The study aims at evaluating the robustness of sulfidogenic anaerobic membrane bioreactor for the treatment of synthetic acid mine drainage (pH∼4.0) containing Fe, Cu, Zn, Co, Mn, Ni and As. The performance of the anaerobic membrane bioreactor was evaluated at varying fluxes (3.6–8.25 l(m 2 h) −1 ), hydraulic retention times (1.3–2 days), gas scouring rates (1.67–7.8 m 3 -gas (m 2 h) −1 ) and heavy metal concentrations. Anaerobic membrane bioreactor was operated at sulfate and chemical oxygen demand concentrations of 2000 mg l −1 and 1500 mg l −1 , respectively, corresponding to chemical oxygen demand/sulfate ratio of 0.75. Ethanol was externally supplemented as carbon and energy sources for sulfate-reducing bacteria. The performance improved with doubling metal concentrations in the feed as both sulfate reduction and chemical oxygen demand oxidation performances reached 95%. Electron flow from ethanol oxidation to sulfate reduction averaged 90%. Alkalinity generated from sulfate reduction increased the feed pH from 4.0 to neutral values. Throughout the study over 99% removals were observed for Fe, Cu, Zn, Co, and Ni. Whereas partial removals of Mn (76–91%) and As (41–67%) were observed.