Ultrafiltration (UF) membrane systems are an attractive technology for groundwater and surface water treatment. Proper system design is especially critical in surface waters with higher levels of organic and solid materials. For these difficult waters, membrane filtration is often substantially improved through effective pretreatment and maintenanc...

A retrofit was performed at a Northeast Alabama UF facility after 6 years of operation with PVDF UF replacing polysulfone UF. Improved operations were observed in more sustainable flux and lower average transmembrane pressures (TMP)....

This paper gives a case study to highlight membranes in mining applications, with a discussion of process considerations including pretreatment chemistry and contaminant speciation. Equipment design concepts are also explored....

Recent trends in membrane system design, such as the open-platform system concept, are discussed in this paper. In addition, the results of a pilot study are shown which demonstrate the effectiveness of ay Ultrafiltration (UF) membranes available on the market. Finally, case studies of challenging small-scale systems in Utah and Oregon are discusse...

The Surface Water and Treatment System facility consists of lime-softened clarification, dual media filtration, ultrafiltration membrane filtration, and reverse osmosis (RO) membrane treatment. This system treats water from Lake Granbury in Granbury, Texas, which has elevated levels of chlorides ranging from 50 to 1,400 mg/L. As designed, the syste...

As UF/MF membrane modules reach the end of their useful life, end-users have more options than ever before to either purchase direct module replacements or upgrade the system. Recent trends and advancements in membrane materials, configuration, and process design have improved the performance of low pressure membrane systems. With more options for ...

This presentation is about a 2.9 MGD UF/RO project for the purpose of removing selenium from a mine-influenced surface water. It's important because of the limited published work regarding UF/RO application for selenium rejection, and the use of an open-platform UF system in an industrial application, which is one of if not the first documented ins...

In this work, a full-scale 2.9 MGD open-platform (UF) system was implemented as pretreatment to an RO system for selenium removal from a mine-influenced surface water. Multiple concepts are analyzed including (1) the importance of pretreatment chemistry and understanding contaminant speciation, (2) the value and practical considerations of open-pla...

This abstract will discuss background information to provide context for arsenic removal from a regulatory and health perspective, as well as a brief overview of alternate treatment methods. This paper should be added to the program because extensive operating data and results from three full-scale sites across two distinctly different industrial a...

The Hayden Wastewater Treatment Plant process consists of a headworks, equalization, enhanced biological nutrient removal, oxidation ditches, and secondary clarifiers. The facility produces typical effluent total phosphorus (TP) concentrations in the range of <1.0 mg/L as P. However, during upset conditions, these effluent concentrations can often ...

A pre-engineered, fully automated ultrafiltration system piloted and commissioned for the Town of Fine, NY, is described. The Town, in coordination with neighboring users, elected to install an ultrafiltration system after thorough review of technology options and completion of on-site piloting to address the necessary upgrades to the water treatme...

A pre-engineered, fully automated ultrafiltration system piloted and commissioned for the Town of Fine, NY, is described. The Town, in coordination with neighboring users, elected to install an ultrafiltration system after thorough review of technology options and completion of on-site piloting to address the necessary upgrades to the water treatme...

A two-stage ultrafiltration system designed, built, and commissioned for the City of Big Timber, MT, is described. After a thorough review of technology options, while determining how to bring their WTP system into compliance and work with existing infrastructure options and limits, the City elected to install a two-stage ultrafiltration system in ...

A two-stage ultrafiltration system designed, built, and commissioned for the City of Big Timber, MT, is described. After a thorough review of technology options, while determining how to bring their WTP system into compliance and work with existing infrastructure options and limits, the City elected to install a two-stage ultrafiltration system in ...

Since 1953, Halifax County Service Authority (HCSA) has treated the Dan River using flocculation, sedimentation, and conventional sand filtration at their Leigh Street Water Treatment Plant. HCSA is interested in replacing the existing sand filtration system with ultrafiltration (UF) membranes to provide consistent, high quality drinking water for ...

Since 1953, Halifax County Service Authority (HCSA) has treated the Dan River using flocculation, sedimentation, and conventional sand filtration at their Leigh Street Water Treatment Plant. HCSA is interested in replacing the existing sand filtration system with ultrafiltration (UF) membranes to provide consistent, high quality drinking water for ...

Ultrafiltration (UF) technology is widely applied for treatment of surface water and ground water under direct influence sources due to the ability to consistently and reliably remove pathogenic organisms and suspended solids to produce high quality filtrate. Smaller-scale utilities often have unique constraints and fewer available resources, which...