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 […]
Boil water advisory, algae and organics: Membrane Technology for rescue
This presentation describes the upgrade pathway of a small indigenous community water treatment facility that was not meeting the water quality standards. This includes process selection, side-by-side pilot testing to […]
A 10-Year Journey to a New Desalter, Now What?
In-Line Coagulation Upstream Ultrafiltration – Comparison of Continuous vs. Intermittent Addition
The subject of this summary is the comparison between continuous and intermittent coagulant addition upstream of ultrafiltration membranes to remove organic compounds and thereby minimize the biological fouling of reverse […]
Removal of Colloidal Particles through Online Monitoring to Lower Microfiltration Membrane Fouling
Fouling of microfiltration (MF) membranes results in increased energy demand, increased cleaning intervals, and membrane replacement frequency. MF membrane fouling is largely due to deposition of colloidal nanoparticles
A Simple and Reliable Lab Tool to Anticipate Risks of UF Membrane Abrasion at Full-Scale
A new method for direct measurement of the abrasion propensity of UF membranes used in water treatment plants was developed. Standard conditions were determined to obtain a rapid response.
First On-Demand Potable Ceramic Membrane System in U.S. Minimizes Energy and Waste
The City of Butte, MT had to put in a treatment plant when it found that the existing chlorination system was producing byproducts that exceeded EPA limits. The plant was […]
Silica-Functionalized Quaternary Ammonium Nanocoated Mesh for Water Disinfection and Cyanobacteria Growth Control
Harmful algal blooms are organisms that have potentially affected the quality of many water bodies around the world. In this abstract, the synthesis of a Quaternary ammonium (QACs) nanocoated fiberglass […]
RO System Flux Balancing – Design Considerations and Operating Experience
Many new RO systems are including equipment and controls to provide flux balancing. In our experience, the proper application of flux balancing is not well understood by the RO design […]
EMWD?s Perris II Desalter Design Refinements: Source Water Quality/Equalization, Pre-Treatment, Phasing/Integration, and Beyond!
This paper summarizes specific challenges, considerations and solutions associated with the design of Eastern Municipal Water District?s (EMWD?s) Perris II Desalter. Topics include source water quality/equalization, pre-treatment, integration with existing […]
