| Autor: |
Uman AE; Department of Civil and Environmental Engineering, University of South Florida, Tampa, FL 33617, USA.; Bioengineering Department, Istanbul Medeniyet University, Istanbul 34000, Turkey., Bair RA; Department of Civil and Environmental Engineering, University of South Florida, Tampa, FL 33617, USA., Yeh DH; Department of Civil and Environmental Engineering, University of South Florida, Tampa, FL 33617, USA. |
| Jazyk: |
angličtina |
| Zdroj: |
Membranes [Membranes (Basel)] 2021 May 31; Vol. 11 (6). Date of Electronic Publication: 2021 May 31. |
| DOI: |
10.3390/membranes11060415 |
| Abstrakt: |
A lab-scale (6.2 L) anaerobic membrane bioreactor combined with a tubular, cross-flow, PVDF ultrafiltration membrane was developed and operated to assess the long-term fouling behavior of a cyclically operated anaerobic membrane bioreactor (AnMBR). The AnMBR was operated at 35 ± 1 °C for 200 days with a synthetic influent of 501 mg·L -1 COD to mimic municipal wastewater. The system exhibited high treatment performance with an average COD removal efficiency of 86.5 ± 6.4% ( n = 20) and an average permeate COD concentration of 63.9 ± 31.1 mg·L -1 . A clear permeate with an average turbidity of 0.6 ± 0.2 NTU, was achieved. Permeate TN and TP concentrations were 22.7 ± 5.1 mg·L -1 and 6.9 ± 2.0 mg·L -1 corresponding to removal efficiencies of 20.6% and 49.3%, respectively, likely due to membrane rejection of particulate, colloidal, and organic fractions. A stable membrane flux of 4.3 L.m -2 .h -1 (LMH) was maintained for 183 days without gas-lift, gas sparge, or chemical cleaning. Cyclical operation with frequent relaxation (60 s for every 30 min of the permeate production run) and periodic permeate backwash (15 s for every 186 min) maintained stable membrane operation with an average TMP of 0.25 bar and a fouling rate of 0.007 kPa/h for the entire operating period. The comparison revealed frequent backwashing and relaxation is a sustainable strategy for operation of the AnMBR. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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