Presentations by Clemson University
Matches: 17
Removal of Inorganic Scale from RO Membranes using Dissolved CO2
Membrane fouling is a major operational issue in reverse osmosis (RO) desalination plants. In particular, plants treating brackish groundwater can encounter troublesome inorganic membrane scales. A novel cleaning method is proposed to remove inorganic scales from fouled RO membranes using dissolved CO2. A comparison of cleaning methods is discusse...
Aggregation of Superfine Carbon for Improved Filtration Performance
Examines the use of superfine powdered activated carbon particles as pretreatment....
Role of Membrane Technology in Seawater Desalination: Past, Present, and Future
This PowerPoint examines the role of membranes in Seawater desalination both past, current and future...
Comparison of Computational Fluid Dynamics (CFD) and Experimental Data for Fouling Mitigation with Sinusoidal Reverse Osmosis Spacer
This paper describes work done on a series of novel sinusoidal spacers that can form unobstructed sinusoidal membrane channels and the performance of various novel sinusoidal spacers and the conventional mesh spacer on mitigating foulant deposition onto membrane surface. Data was evaluated both experimentally on a bench-scale RO system and numerica...
Membrane Filtration of Colloidal Activated Carbon: Considerations for Optimization of Head Loss Reduction and Small Molecule
This paper describes the use of microfiltration membrane for the filtration of colloidal activated carbon. Efforts were made to minimize head loss and small molecule adsorption. The effects of source water quality and particle size were evaluated. The presence of natural organic matter (NOM) proved to be a confounding factor. Two methods were test...
Effects of Dissolved CO2 on Organic and Inorganic Fouling and Cleaning of RO Membranes
Reverse osmosis (RO) is a membrane treatment process used to separate dissolved solutes from water. This technique has become increasingly popular due to the variety of objectives it may accomplish, including desalination of seawater or brackish water, advanced treatment for water reuse, softening, natural organic matter removal to minimize disinfe...
Concentration Polarization Modeling for Reverse Osmosis Membranes with Engineered Surface Features
Fouling has always been an issue in all membrane systems, and it is more problematic when concentration polarization (CP) is high.This research investigates how patterns can affect CP layer in a reverse osmosis (RO) or nanofiltration (NF) system by evaluating the effects of velocity, pressure drop, concentration distribution and shear stress on the...
Toward Optimized Membrane Unit Processes Via Multi-Scale Modeling
This work is at the interface of research and practice, which is ideal for the Membrane Technology Conference. We take our academic understanding of membranes and computer modeling techniques and show how it can enhance the process engineering work being done by those in the field....
Computational Fluid Dynamics (CFD) Modeling of Novel Designs for 3D-Printed Spacers in High-Pressure Membrane Modules
In the recent decade, 3D printing technology has been used to produce spacers in the membrane industry due to its advantages at dealing with complicated geometries and simplifying the assembling process. A new spacer methodology is investigated that uses 3D printing to directly attach spacers to the membrane surface. The novelty of this method is t...
Computational Fluid Dynamics (CFD) Modeling of Novel Designs for 3D-Printed Spacers in High-Pressure Membrane Modules
In the recent decade, 3D printing technology has been used to produce spacers in the membrane industry due to its advantages at dealing with complicated geometries and simplifying the assembling process. A new spacer methodology is investigated that uses 3D printing to directly attach spacers to the membrane surface. The novelty of this method is t...
Energy Reduction in Ceramic Microfiltration using Carbon-Dioxide-Enhanced Backwash
Supersaturated carbon dioxide solution was applied to backwash ceramic membranes. Three types of feed water were employed with the filtration of three membranes with different serving time. CO2 backwash had a lower average TMP of backwash, leading to higher flux. The increment TMP of filtrations before and after CO2 backwash was lower than DI water...
Energy Reduction in Ceramic Microfiltration using Carbon-Dioxide-Enhanced Backwash
Supersaturated carbon dioxide solution was applied to backwash ceramic membranes. Three types of feed water were employed with the filtration of three membranes with different serving time. CO2 backwash had a lower average TMP of backwash, leading to higher flux. The increment TMP of filtrations before and after CO2 backwash was lower than DI water...
Managing and Treating PFAS in Membrane Concentrates
Per- and polyfluoroalkyl substances (PFAS) have detrimental impacts on human health and the environment. Reverse osmosis (RO) and nanofiltration (NF) have shown excellent PFAS separation performance in water treatment; however, these membrane systems do not destroy PFAS but produce concentrated residual streams that need to be managed. Complete des...
Managing and Treating PFAS in Membrane Concentrates
Per- and polyfluoroalkyl substances (PFAS) have detrimental impacts on human health and the environment. Reverse osmosis (RO) and nanofiltration (NF) have shown excellent PFAS separation performance in water treatment; however, these membrane systems do not destroy PFAS but produce concentrated residual streams that need to be managed. Complete des...
Managing and Treating PFAS in Membrane Concentrates
Per- and polyfluoroalkyl substances (PFAS) have detrimental impacts on human health and the environment. Reverse osmosis (RO) and nanofiltration (NF) have shown excellent PFAS separation performance in water treatment; however, these membrane systems do not destroy PFAS but produce concentrated residual streams that need to be managed. Complete des...