Addressing the Needs of a Remote Community Using a Package Ultrafiltration System and Prefabricated Building Design
Water treatment systems installed in remote locations require customized design strategies to minimize the requirement for frequent operator site visits. Unique challenges such as site access, system automation, waste management, and consumable usage and storage all need to be addressed in the final design. Optimizing the system for efficient water recovery can drive the most […]
Pilot Study and Design of Integrated Membrane Treatment Systems for Alaska Surface Water
The City of Kotzebue is upgrading its water treaThe City of Kotzebue is upgrading its water treatment plant to improve the quality of the treated water and increase its capacity to accommodate future increases in drinking water consumption in its service area. A Preliminary Engineering Report was prepared for the city in 2011 addressing proposed […]
Long Term Performance Comparison: Side by Side Pressure & Submerged Ultrafiltration Plants Treating Surface Water
The Town of Erie (Town), Colorado operates a water treatment plant with both pressurized and submerged ultrafiltration systems side by side. There are few facilities world-wide that have side by side systems limiting the ability for actual operational comparisons. This paper will provide a comparison of the pressure and submerged systems operating on the same […]
Optimization of Submerged Ultrafiltration Membranes – Kennewick WTP as Case Study
As the City of Kennewick, Washington looks to increase the capacity of the membrane water treatment plant (WTP) to its full master planned capacity of 30 MGD, they have identified the need to conduct membrane optimization study with a goal of energy/operation cost savings. This presentation shares historical operational performance of the membrane units over […]
Low Dosage Scale Inhibitor Addition for RO and NF Applications
Jupiter Water Utilities (Town) owns and operates a 30 million gallon per day (MGD) drinking water treatment facility comprising of nanofiltration (NF), reverse osmosis (RO), and anion exchange (AX). The Town also owns pilot-scale NF and RO units that are utilized for pretreatment optimization, membrane selection, contaminant of emerging concern rejection studies, among other uses. […]
Targeting Zeta Potential Value Versus Clarified Turbidity as Preatment to MF/UF
A major drawback of utilizing clarification/sedimentation ahead of low-pressure membranes is the issue of organic polymer addition (clarifier aid). Most membrane suppliers and design engineers restrict the use of this product to prevent potential accumulation within the membrane fiber and subsequent loss of beneficial use. Cationic polymers are specifically eliminated from consideration, although based on […]
Pretreatment Review for NF and LPRO Membranes: Literature Review and Case Studies
Selection of an appropriate pretreatment process for a nanofiltration (NF) or low-pressure reverse osmosis (LPRO) system is critical to optimizing recovery, water quality, and clean-in-place (CIP) requirements. Key pretreatment considerations include whether or not to remove dissolved Fe and Mn ahead of NF or LPRO, whether biofouling control is needed, the extent of filtration required, […]
Exceeding 90% Recovery with Conventional and Closed-Circuit RO: Results from Parallel Pilot Systems
For inland reverse osmosis (RO) systems, brine disposal is often difficult and costly, and there is significant interest in increasing recovery and reducing brine volumes. The City of Buckeye, AZ owns brackish wells that have trace amounts of arsenic, nitrate, and various metals, and is considering RO treatment for these wells. Desktop modeling predicted that […]
Maximizing Potable Water Production at EMWD’s Desalination Complex via CCRO Pilot Testing
The Eastern Municipal Water District (EMWD) currently uses reverse osmosis (RO) at it’s Menifee and Perris I Desalter to produce drinking water from otherwise unusable brackish groundwater. A third RO facility is currently under construction (Perris II). The three RO systems are co-located to form the Desalination Complex and are projected to produce up to […]
Brine Minimization Using Closed Circuit Reverse Osmosis (CCRO)
Marine Corps Air Ground Combat Center (MCAGCC) Twentynine Palms is in the Mojave Desert in California and is one of the largest military training areas in the nation. MCAGCC relies on groundwater for its drinking water supply. Due to concerns about depletion of the existing aquifer and the presence of hexavalent chromium in some of […]
