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Full-Text Articles in Science and Technology Studies
Effects Of Salinity Build-Up On The Performance Of An Anaerobic Membrane Bioreactor Regarding Basic Water Quality Parameters And Removal Of Trace Organic Contaminants, Xiaoye Song, James A. Mcdonald, William E. Price, Stuart J. Khan, Faisal I. Hai, Hao H. Ngo, Wenshan Guo, Long D. Nghiem
Effects Of Salinity Build-Up On The Performance Of An Anaerobic Membrane Bioreactor Regarding Basic Water Quality Parameters And Removal Of Trace Organic Contaminants, Xiaoye Song, James A. Mcdonald, William E. Price, Stuart J. Khan, Faisal I. Hai, Hao H. Ngo, Wenshan Guo, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
The effects of elevated inorganic salt concentration on anaerobic membrane bioreactor (AnMBR) treatment regarding basic biological performance and trace organic contaminant (TrOC) removal were investigated. A set of 33 TrOCs were selected to represent pharmaceuticals, steroids, and pesticides in municipal wastewater. Results show potential adverse effects of increase in the bioreactor salinity to 15 g/L (as NaCl) on the performance of AnMBR with respect to chemical oxygen demand removal, biogas production, and the removal of most hydrophilic TrOCs. Furthermore, a decrease in biomass production was observed as salinity in the bioreactor increased. The removal of most hydrophobic TrOCs was high …
Biomethane Potential Evaluation Of Co-Digestion Of Sewage Sludge And Organic Wastes, Richard Wickham, Brendan Galway, Heriberto A. Bustamante, Long D. Nghiem
Biomethane Potential Evaluation Of Co-Digestion Of Sewage Sludge And Organic Wastes, Richard Wickham, Brendan Galway, Heriberto A. Bustamante, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
Co-digestion of organic rich wastes and wastewater sludge to enhance biogas production has become an attractive economic possibility for water utilities. The suitability of the organic rich waste depends on its ability to produce biogas as well as its influence on the overall anaerobic digestion process. Biomethane potential evaluation was conducted to screen seven organic wastes and dehydrated algae. All co-substrates increased the bio-methane yield by three to six times compared with conventional anaerobic digestion of sewage sludge. Maximum co-digestion ratios were identifiable for most solid co-substrates including algae (6% wt/wt), undiluted food waste (5% wt/wt), bakery waste (5% wt/wt), …
Biological Performance And Trace Organic Contaminant Removal By A Side-Stream Ceramic Nanofiltration Membrane Bioreactor, Hop Phan, James A. Mcdonald, Faisal I. Hai, William E. Price, Stuart J. Khan, Takahiro Fujioka, Long D. Nghiem
Biological Performance And Trace Organic Contaminant Removal By A Side-Stream Ceramic Nanofiltration Membrane Bioreactor, Hop Phan, James A. Mcdonald, Faisal I. Hai, William E. Price, Stuart J. Khan, Takahiro Fujioka, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
This study evaluated the performance of a side-stream ceramic nanofiltration membrane bioreactor (NF-MBR) system with respect to basic water quality parameters as well as trace organic contaminant (TrOC) removal efficiency. The results show a stable biological performance of the continuous NF-MBR system with high effluent quality (total organic carbon < 4 mg L-1 and NH4 +-N below the detection limit). Significantly higher performance by this NF-MBR in comparison to the conventional microfiltration/ultrafiltration MBR regarding the removal of a large number of TrOCs was observed. TrOC removal efficiency depended on their hydrophobicity and molecular features. All hydrophobic compounds (LogD pH=6 > 3) were well removed (>85%), except diazinon (59 ± 7%). Hydrophilic compounds containing electron donating groups were also well removed (>90%). By contrast, hydrophilic compounds containing electron withdrawing groups were poorly removed (8-54%). Most of the 40 TrOCs investigated in this study did not accumulate in the sludge. Only …
Evaluating Ionic Organic Draw Solutes In Osmotic Membrane Bioreactors For Water Reuse, Wenhai Luo, Faisal I. Hai, William E. Price, Menachem Elimelech, Long D. Nghiem
Evaluating Ionic Organic Draw Solutes In Osmotic Membrane Bioreactors For Water Reuse, Wenhai Luo, Faisal I. Hai, William E. Price, Menachem Elimelech, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
The performance of two ionic organic draw solutes, namely sodium acetate (NaOAc) and ethylene-diamine-tetra acetic acid disodium salt (EDTA-2Na), during osmotic membrane bioreactor (OMBR) operation was investigated in this study. Their performance was compared to that of sodium chloride (NaCl). A reverse osmosis (RO) process was integrated with OMBR to form an OMBR-RO hybrid system for draw solute recovery and clean water production. Results show that the NaOAc and EDTA-2Na draw solutes significantly reduced salinity build-up in the bioreactor in comparison with NaCl during OMBR operation. At the same osmotic pressure, these two ionic organic draw solutions produced slightly lower …