The paper and presentation will describe the MBR process at the JCEC and it's impact on the surrounding community and environment. In 2002-2003, the Metropolitan North Georgia Water Planning District Act was adopted to curtail anticipated water shortages, which could ultimately inhibit economic growth. This act required water reuse system develop...

Understanding micro constituent rejection by Reverse Osmosis (RO) and Nanofiltration (NF). Characterizing the realm of microconstituents and the contaminant properties relative to the membrane properties. Discussing bulk liquid properties and the interaction of all properties on the membranes performance....

The City of Escondido (City) is actively engaged in evaluating various options for ensuring adequate capacity at its Hale Avenue Resource Recovery Facility (HARRF.) The City is also interested in evaluating tertiary filtration technologies for upgrading existing continuous backwashing sand filters. In addition, the City is interested in evaluating ...

This paper will present the startup of the MBR facility. The startup flow was only 2.5 mgd which presented challenges not only for meeting effluent nitrogen and phosphorus limits, but also operational performance guarantees. These included guarantees of chemical and power costs per unit volume of wastewater treated. The paper will describe how thes...

The City of Kingman commissioned a state of the art flat panel membrane bioreactor (MBR). This paper discusses the selection of hollow-fiber MBR versus flat-panel MBR, and presents a case study for the implementation of flate-plat MBR at the City of Kingman facility....

Discussion on when to apply NF/RO systems in water and wastewater treatment applications, alogn with the limitations of the technology...

A large steel manufacturing plant uses a significant amount of water for the steelmaking process and boiler feed. Treating the wastewater generated from the steelmaking process for reuse within the plant conserves water. The treatment process includes ultrafiltration, reverse osmosis, and mixed bed ion exchange polishing for boiler feed....

In South Florida, nanofiltration (NF) has become a vital part of the water treatment landscape. The widespread use of nanofiltration in the region, combined with a challenging source water, makes control of fouling and cleaning of fouled membranes critical issues. For this presentation, the literature was reviewed to identify critical factors that ...

In Arizona, fresh water sources are currently and will continue to be limited. Natural surface waters are already fully developed, many groundwater sources are being over drafted, and the State's 2.8 million acre-foot allocation of Colorado River Water could be reduced in response to long term drought and other effects of climate change. One source...

This paper presents a history of membrane applications in petroleum processing facilities and updates the list of reported worldwide membrane installations for effluent treatment and reuse. These installations include membrane bioreactors (MBR), tertiary MF/UF, with or without RO. Several case studies described the impetus for reuse, water qualit...

The conventional approach to desalting brackish waters is to use reverse osmosis (RO) with a blend stream to achieve a desired target water quality. Sulfuric acid is typically dosed in the feed along with an antiscalant to prevent fouling from sulfate salts, calcium phosphate, calcium carbonate and silica. Caustic or lime is added to the blended pr...

The Guam Water Authority owns and operates the Ugum WTP located on the southeast portion of the Island of Guam treating water from the Ugum River. The paper discusses upgrading from a conventional coagulation/flocculation, sedimentation, granular media filtration with chlorine disinfection to incorporating submerged UF membrane to replace the medi...

This presentation will include a brief discussion of water membrane technologies and their applications in the petrochemical and refining industries, a survey of worldwide membrane installations for wastewater treatment and reclamation in petrochemical plants and refineries; and three representative case studies of using membrane technologies at th...

This paper includes a comparison of predicted rejection rates of trace organic contaminants by nanofiltration and low pressure reverse osmosis membranes using a qualitative predictive tool versus actual observed results for four membranes treating tertiary treated municipal wastewater....

This paper describes efforts by the City of Santa Monica (City) for groundwater restoration program to reduce its reliance on imported water supplies and maximize local resources. With the completion of the Charnock Well Field Restoration Program in 2011, the City was able to reduce its reliance on imported water supplies from 90% down to approxima...

The paper describes the new Q1W Utility that will integrate its industrial and municipal wastewater treatment systems in Quincy, Washington. At the core of the utility are new membrane ultrafiltration and reverse osmosis treatment systems to control total dissolved solids in the reused water. The ultrafiltration system will be used to meet the Wash...

This paper describes four pilot studies that were conducted to evaluate the Membrane bioreactor (MBR) process for leachate treatment. Both hollow fiber and cross-flow systems from several vendors were evaluated. One system also includes application of RO following the MBR process as a polishing step. Data from these systems highlight biological per...

N-nitrosodimethylamine (NDMA) has long been recognized as one of the key contaminant of concern for potable reuse (NRC, 2012). Utilities currently operating advanced water purification facilities (AWPF) for indirect potable reuse (IPR) have implemented various strategies, including source control, diversion of sidestream return flows, or use of al...

With environmental regulators placing ever greater scrutiny upon nutrient control, many wastewater treatment facilities, both new and existing, are having to review additional processes and technologies to achieve effluent compliance. Given that effluent TSS contains both nitrogen and phosphorus, many facilities are turning to MBR technology to add...

Arsenic contamination of groundwater is primarliy an outcome of natural geologic formations. The Town of Tornillo has had high arsenic concentration levels varying up to 0.15 mg/l, exceeding the maximum containment level for drinking water. In 2017, a new Arsenic Treatment Facility was constructed which oxidizes and removes existing iron concentrat...

A traditional two-stage RO system was coupled with a 3rd-stage, semi-batch RO process to increase overall recovery above 92%. The CCD process was integrated as a 3rd-stage as it could achieve higher recoveries due to its cyclical operation pattern, ability to achieve higher cross-flow velocities through recirculation of the concentrate stream, and ...

This presentation follows up from a previous study where a two-pass nanofiltration/reverse osmosis (NF/RO) system was used to selectively remove sodium chloride and reduce concentrate disposal costs. The current study, initiated in June 2017, includes a scalable NF/RO system running in parallel with a reverse osmosis system to demonstrate reduction...

Membrane technologies such as microfiltration/ultrafiltration and reverse osmosis have been used successfully for treatment of municipal wastewater effluent for indirect potable reuse for nearly 20 years. The use of these membrane technologies are not as prevalent for industrial effluent reuse due to variable water quality and cost considerations. ...

This paper describes the application of Closed Circuit Reverse Osmosis (CCRO) in an existing brackish groundwater treatment plant to increase membrane system recovery and help the City of Santa Monica achieve its water sustainability goals. The findings demonstrate that CCRO offers a cost effective approach that can be implemented at full scale on ...

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The Hyperion Advanced Water Purification Facility is a “proof of concept” treatment project that will provide highly treated water for multiple non-potable uses at the Los Angeles International Airport (LAX) and the Hyperion Water Reclamation Plant (HWRP). These uses may include make-up water for cooling towers, toilet flushing, boiler feed mak...

The Hyperion Advanced Water Purification Facility is a “proof of concept” treatment project that will provide highly treated water for multiple non-potable uses at the Los Angeles International Airport (LAX) and the Hyperion Water Reclamation Plant (HWRP). These uses may include make-up water for cooling towers, toilet flushing, boiler feed mak...

This paper describes the results of pilot testing Closed Circuit Reverse Osmosis (CCRO) and Flow Reversal Reverse Osmosis (FRRO) technologies in an existing brackish groundwater treatment plant to increase membrane system recovery and help the City of Santa Monica achieve its water sustainability goals. The City of Santa Monica has limited addition...

This paper describes the results of pilot testing Closed Circuit Reverse Osmosis (CCRO) and Flow Reversal Reverse Osmosis (FRRO) technologies in an existing brackish groundwater treatment plant to increase membrane system recovery and help the City of Santa Monica achieve its water sustainability goals. The City of Santa Monica has limited addition...

In this study, four commercially available membranes (NF270, NF90, CR100, and SW30) spanning the loose NF to tight RO separation ranges were investigated for their PFAS rejection performance. The specific focus was devoted to evaluating the removal of perfluoroalkyl acids (PFAAs) in a full-scale closed-circuit desalination (CCD) pilot module operat...

In this study, four commercially available membranes (NF270, NF90, CR100, and SW30) spanning the loose NF to tight RO separation ranges were investigated for their PFAS rejection performance. The specific focus was devoted to evaluating the removal of perfluoroalkyl acids (PFAAs) in a full-scale closed-circuit desalination (CCD) pilot module operat...

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