Design and Performance of a Pilot Submerged Membrane Electro-Bioreactor (SMEBR) for Wastewater Treatment

摘要: The quality of wastewater treatment plants effluents in Canada, and more specifically Quebec is a huge concern. Hence, several technologies have been widely used order to protect water resources from the discharge many undesirable components. main objective this study was design/scale-up, install, operate new hybrid, compact system (Submerged Membrane Electro-Bioreactor; SMEBR) that would yield an excellent effluent, reduce membrane fouling, improve sludge properties. SMEBR combined three phenomena; filtration, electrokinetics, biological treatment. Three Phases were performed study. In Phase 1 (4 Stages), laboratory scale treating synthetic operated under different operating conditions screen out determine ranges technological design parameters. These included determination critical flux variation aeration intensity (Stage 1), current density 2), electrical zone volume with respect total effective liquid 3), hydraulic retention time (HRT) 4). 2 focused on scaled-up pilot raw municipal wastewater. It divided into 3 Stages where Stage designed 1a), installed 1b), 2) plant City l’Assomption (Quebec, Canada) for 7 weeks. A comparative conventioanl MBR also 2. investigated relationship between transmembrane pressure (TMP) properties as well interaction among 3, scale-up process verified using steady state conditions; conducted conjunction facility protocol provided full applications. At operation, removal efficiencies COD, ammonia (as NH3+-N) phosphorous PO43--P) 92%, 99% 99%, respectively. Furthermore, monitored had not shown any significant increase which could lead conclusion fouling marginal. system, filterability dewaterability significantly enhanced by 78% when mean particle size diameter flocs decreased 69 17.5 µm. Specific cake resistance minimized 0.15x1014 m/kg (82% reduction). Moreover, settleability 30% while index (SVI) 170 119 mL/g. improved flocculation zeta potential changed -26.2 -14.2 mV. Electrodes found last five months before replacement. “self-purification” some generated aluminum major metals retained adsorbed surface electrodes, small amounts leave effluent or present wasted sludge. without additional unit able remove High rates Pb (100%), Ni (98.1%), Cu Cd (94.6%) reported. energy requirements less than kWh/m3 cost CAD $0.052/m3. be concluded showed superiority performance over can successfully applied large plants.