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Articles 1 - 9 of 9
Full-Text Articles in Science and Technology Studies
Impermeable Assemblages: Flooding, Urban Infrastructure, And Stormwater Politics In São Paulo, Brazil, Nate Millington
Impermeable Assemblages: Flooding, Urban Infrastructure, And Stormwater Politics In São Paulo, Brazil, Nate Millington
Theses and Dissertations--Geography
This project analyzes efforts to remake the relationship between water and city in São Paulo, Brazil. Currently experiencing overlapping problems of flooding, scarcity, and pollution, São Paulo illustrates the challenges of managing water in a contemporary mega-city. This dissertation subsequently considers the city’s water management through an approach that borrows from urban political ecology, social studies of science, and post-colonial urban theory. With an epistemological grounding in these literatures, this project analyzes ongoing conversations about water management in São Paulo, and focuses on how water is encountered and engaged with in the landscape by engineers, artists, and activists. This project …
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 …
Modelling Water Molecules Inside Cyclic Peptide Nanotubes, Prangsai Tiangtrong, Ngamta Thamwattana, Duangkamon Baowan
Modelling Water Molecules Inside Cyclic Peptide Nanotubes, Prangsai Tiangtrong, Ngamta Thamwattana, Duangkamon Baowan
Faculty of Engineering and Information Sciences - Papers: Part A
Cyclic peptide nanotubes occur during the selfassembly process of cyclic peptides. Due to the ease of synthesis and ability to control the properties of outer surface and inner diameter by manipulating the functional side chains and the number of amino acids, cyclic peptide nanotubes have attracted much interest from many research areas. A potential application of peptide nanotubes is their use as artificial transmembrane channels for transporting ions, biomolecules and waters into cells. Here, we use the Lennard-Jones potential and a continuum approach to study the interaction of a water molecule in a cyclo[(-DAla- L-Ala)4-] peptide nanotube. Assuming that each …
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 …
Graphene/Pvdf Flat-Sheet Membrane For The Treatment Of Ro Brine From Coal Seam Gas Produced Water By Air Gap Membrane Distillation, Yun Chul Woo, Youngjin Kim, Wang-Geun Shim, Leonard D. Tijing, Minwei Yao, Long D. Nghiem, June-Seok Choi, Seung-Hyun Kim, Ho Kyong Shon
Graphene/Pvdf Flat-Sheet Membrane For The Treatment Of Ro Brine From Coal Seam Gas Produced Water By Air Gap Membrane Distillation, Yun Chul Woo, Youngjin Kim, Wang-Geun Shim, Leonard D. Tijing, Minwei Yao, Long D. Nghiem, June-Seok Choi, Seung-Hyun Kim, Ho Kyong Shon
Faculty of Engineering and Information Sciences - Papers: Part A
No abstract provided.
Membrane Distillation And Membrane Electrolysis Of Coal Seam Gas Reverse Osmosis Brine For Clean Water Extraction And Naoh Production, Hung Duong, Mikel C. Duke, Stephen Gray, Bart Nelemans, Long D. Nghiem
Membrane Distillation And Membrane Electrolysis Of Coal Seam Gas Reverse Osmosis Brine For Clean Water Extraction And Naoh Production, Hung Duong, Mikel C. Duke, Stephen Gray, Bart Nelemans, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
Membrane distillation (MD) and membrane electrolysis (ME) were evaluated for simultaneous fresh water extraction and NaOH production from a mixture of NaCl and NaHCO3 to simulate the composition of coal seam gas (CSG) reverse osmosis (RO) brine. Experimental results demonstrate the potential of MD for producing fresh water and simultaneously concentrating CSG RO brine prior to the ME process. MD water flux was slightly reduced by the increased feed salinity and the decomposition of bicarbonate to CO2 during the concentration of CSG RO brine. MD operation of CSG RO brine at a concentration factor of 10 (90% water recovery) was …
Water Reclamation And Nitrogen Extraction From Municipal Solid Waste Landfill Leachate, Long D. Nghiem, Faisal I. Hai, Andre Listowski
Water Reclamation And Nitrogen Extraction From Municipal Solid Waste Landfill Leachate, Long D. Nghiem, Faisal I. Hai, Andre Listowski
Faculty of Engineering and Information Sciences - Papers: Part A
This study aims to explore several innovative technologies including electrocoagulation, nanofiltration (NF), membrane distillation (MD), and ion exchange resin for clean water extraction and resource recovery from landfill leachate. Our results demonstrate the technical feasibility of water reuse and ammonia recovery from landfill leachate. Electrocoagulation was effective as a pretreatment step for the NF process and could remove most suspended solids and some organic matter. The results show that the combination of NF and MD can produce high-quality water from landfill leachate suitable for reuse applications with respect to heavy metals (with the exception of arsenic) and pharmaceutically active compounds …
Characterisation Of Water Sprays Using High-Speed Videography, Alan Green, Paul Cooper, Trent D. Penman, Ross A. Bradstock
Characterisation Of Water Sprays Using High-Speed Videography, Alan Green, Paul Cooper, Trent D. Penman, Ross A. Bradstock
Faculty of Engineering and Information Sciences - Papers: Part B
This paper reports on the characterisation of water sprays for the purpose of modelling the effectiveness of such sprays in mitigating the impacts of wildfires on residential buildings. Four types of water spray nozzles were experimentally tested and analysed using a single high-speed camera and image analysis software. The sprays were generated by a misting nozzle, a hollow-cone nozzle, a rotating 'butterfly' sprinkler and a deflector plate sprinkler. Back-illumination was used to produce silhouette images of droplets within each spray. The point spread function half-width of each droplet image was determined, to give an indication of the distance of the …
A Rapid And Reliable Technique For N-Nitrosodimethylamine Analysis In Reclaimed Water By Hplc-Photochemical Reaction-Chemiluminescence, Takahiro Fujioka, Haruka Takeuchi, Hiroaki Tanaka, Long D. Nghiem, Kenneth P. Ishida, Hitoshi Kodamatani
A Rapid And Reliable Technique For N-Nitrosodimethylamine Analysis In Reclaimed Water By Hplc-Photochemical Reaction-Chemiluminescence, Takahiro Fujioka, Haruka Takeuchi, Hiroaki Tanaka, Long D. Nghiem, Kenneth P. Ishida, Hitoshi Kodamatani
Faculty of Engineering and Information Sciences - Papers: Part A
A fast and reliable analytical technique was evaluated and validated for determination of N-nitrosodimethylamine (NDMA) formation and rejection by reverse osmosis (RO) membranes in potable water reuse applications. The analytical instrument used in this study is high-performance liquid chromatography (HPLC), photochemical reaction (PR) and chemiluminescence (CL) e namely HPLC-PR-CL. Results reported here show that HPLC-PR-CL can be used to measure NDMA with a similar level of accuracy compared to conventional and more time-consuming techniques using gas chromatography and tandem mass spectrometry detection in combination with solid phase extraction. Among key residual chemicals (i.e. monochloramine, hydrogen peroxide and hypochlorite) in reclaimed …