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Full-Text Articles in Engineering
Removal Of Micropollutants By Membrane Bioreactor Under Temperature Variation, Faisal I. Hai, Karin Tessmer, Luong N. Nguyen, Jinguo Kang, William E. Price, Long Nghiem
Removal Of Micropollutants By Membrane Bioreactor Under Temperature Variation, Faisal I. Hai, Karin Tessmer, Luong N. Nguyen, Jinguo Kang, William E. Price, Long Nghiem
Faculty of Engineering - Papers (Archive)
The effects of controlled temperature variation in the range of 10–45 °C were assessed in a lab-scale MBR that treated synthetic municipal wastewater spiked with selected micropollutants. The effects were evaluated with respect to total organic carbon (TOC) and total nitrogen (TN) removal, micropollutant removal, sludge growth, level of soluble microbial products (SMPs) in the mixed liquor and membrane fouling. Overall, the temperature shifts caused high variation in the TOC and TN levels in the reactor supernatant, however that in membrane-permeate was relatively more stable, substantiating the robustness of the MBR process. Results regarding the removal of micropollutants at ambient …
Simultaneous Activated Carbon Adsorption Within A Membrane Bioreactor For An Enhanced Micropollutant Removal, Xueqing Li, Faisal I. Hai, Long Nghiem
Simultaneous Activated Carbon Adsorption Within A Membrane Bioreactor For An Enhanced Micropollutant Removal, Xueqing Li, Faisal I. Hai, Long Nghiem
Faculty of Engineering - Papers (Archive)
Significant adsorption of sulfamethoxazole and carbamazepine to powdered activated carbon (PAC) was confirmed by a series of adsorption tests. In contrast, adsorption of these micropollutants to the sludge was negligible. The removal of these compounds in membrane bioreactor (MBR) was dependent on their hydrophobicity and loading as well as the PAC dosage. Sulfamethoxazole exhibited better removal rate during operation under no or low (0.1 g/L) PAC dosage. When the PAC concentration in MBR was raised to 1.0 g/L, a sustainable and significantly improved performance in the removal of both compounds was observed – the removal efficiencies of sulfamethoxazole and carbamazepine …
Strategies To Enhance The Removal Of The Persistent Pharmaceutically Active Compound Carbamazepine By Membrane Bioreactors, Xueqing Li, Faisal I. Hai, Nichanan Tadkaew, Sara Gilbertson, Long Nghiem
Strategies To Enhance The Removal Of The Persistent Pharmaceutically Active Compound Carbamazepine By Membrane Bioreactors, Xueqing Li, Faisal I. Hai, Nichanan Tadkaew, Sara Gilbertson, Long Nghiem
Faculty of Engineering - Papers (Archive)
Carbamazepine, which is an anti-epileptic drug, is ubiquitously present in municipal wastewater. Owing to its recalcitrant chemical structure, carbamazepine is not significantly removed during conventional biological treatment or even by membrane bioreactor (MBR). With the ultimate aim of providing insights into the strategies to enhance carbamazepine removal, the effect of key operational parameters, namely, loading rate (2–750 μg/L• d), pH (5–9), mixed liquor suspended solids (MLSS) concentration (1–15 g/L) and dissolved oxygen (DO) (
Treatment Of Saline Aqueous Solutions Using Direct Contact Membrane Distillation, Long Nghiem, Florian Hildinger, Faisal I. Hai, Tzahi Cath
Treatment Of Saline Aqueous Solutions Using Direct Contact Membrane Distillation, Long Nghiem, Florian Hildinger, Faisal I. Hai, Tzahi Cath
Faculty of Engineering - Papers (Archive)
The treatment of highly saline aqueous solutions using direct contact membrane distillation (DCMD) was evaluated in this study. Experiments were conducted using a flat sheet polytetrafluoroethylene membrane with nominal pore size of 0.22 µm. Seawater, reverse osmosis (RO) concentrate collected from a wastewater reclamation plant, and a synthetic solution containing 2,000 mg/L of CaSO4 were selected as the representative saline solutions. A gradual decline in permeate flux was observed at the beginning of the experiments when the seawater and RO concentrate solutions were treated using the DCMD process, most likely due to initial organic fouling and scaling. In contrast, …
Effects Of Membrane Fouling And Scaling On Boron Rejection By Nanofiltration And Reverse Osmosis Membranes, Kha Tu, Allan Chivas, Long Nghiem
Effects Of Membrane Fouling And Scaling On Boron Rejection By Nanofiltration And Reverse Osmosis Membranes, Kha Tu, Allan Chivas, Long Nghiem
Faculty of Engineering - Papers (Archive)
The effects of membrane fouling on the performance of nanofiltration and reverse osmosis membranes with respect to boron rejection and permeate flux were investigated in this study. A nanofiltration (NF270) membrane and a reverse osmosis (BW30) membrane were used in this investigation. Four typical membrane fouling conditions were simulated under controlled laboratory conditions in a cross-flow membrane system using four model foulants including humic acid, sodium alginate, colloidal silica and CaSO4. Amongst these model foulants, humic acid was found to increase boron rejection whereas the other foulants led to a decrease in boron rejection. Properties of foulants were found to …