This presentation is a case study that covers The Pinewoods nanofiltration system located in Lee County Florida and how to best expand the system to take advantage of new technology. Also explored was a new reverse osmosis system as an option to work along side the original nanofiltration system....

This presentation describes a unique and successful integration of RO into a conventional surface water treatment plant due to increasing leaves of nitrate during certain times of the year. This process will be of interest to many utilities needing to upgrade or augment their existing treatment capabilities. This project is an excellent example of ...

This presentation provides an overview of feasibility and planning costs for various membrane applications and provides capital and membrane operations and maintenance cost guidelines. A consideration of predictable and unpredictable cost factors, along with cost savings provisions and tips for determining ?Best Value? is included. In addition, ...

This presentation provides a comparison between methods of reducing power consumption in an existing brackish water RO plant by utilizing energy recovery devices. Three options are examined, and a comparison of pumping horsepower and permeate quality is given....

This PowerPoint presentation describes low pressure membrane filtration options and technology and also how a non-proprietary approach can be taken by an OEM....

This PowerPoint presents a review of Midwest USA membrane issues including pilot plants, costs, and application issues for membrane treatment...

This presentation provides information on data collection and analysis for reverse osmosis (RO) and nanofiltration (NF) systems. The presentation begins with a discussion of RO/NF process basics. Data normalization is then discussed followed by graphical illustrations showing how flow, pressure, and salt concentration vary through a low pressure RO...

This presentation includes a case study of the South Island Public Service District desalination facility serving Hilton Head, SC. The facility was built to address salt water intrusion, allowing them to reduce withdrawals in the upper Floridan by utilizing the 2500 mg/L TDS Cretaceous aquifer. Water is 118 F with artesian pressure, drawing from 3,...

Pasquotank County in the Albemarle Sound region of coastal North Carolina decided to upgrade their water supply system by building a reverse osmosis water treatment plant near Elizabeth City. The paper will present design development data and compare to operational data from the first year of operation. Also, other areas of interest will be address...

This presentation on membrane system design is from a preconference workshop in 2014 that discussed optimization of membrane plant performance and troubleshooting. Different aspects of plant design including pretreatment, skid configuration, flow and even cleaning are discussed....

This presentation will provide background information and operational information from the conception of the project, through pilot testing, full-scale commissioning and the past ten years of operation....

The Oden Water Association had an existing media filtration plant treating Oden Bay Water, a bay area off Lake Pend Oreille near Sand Point, Idaho. In 1999 they decided to replace the media filtration with ultrafiltration, which worked well for about 10 years. Then, after a membrane replacement in 2008, they experienced unexpectedly high levels o...

Historically there has been an industry-wide perception that if a feedwater source contains dissolved metals they must be removed via oxidation and filtration prior to RO membrane treatment. The purpose of this paper is to provide data on evaluating the suitability of directly treating high iron and manganese feedwaters with membranes through the p...

This presentation will present guidelines for good basic design parameters for membrane treatment systems including hydraulics and energy efficiency. Detailed information on component selection and materials of construction evaluation will be provided for the membrane process and related ancillary components such as cartridge filters, pumps, clean...

The Signal Hill project showcases an innovative approach that other water suppliers can capitalize on - membrane treatment with high recovery to conserve local resources. This paper describes the key considerations of a hybrid membrane configuration to achieve color removal while maintaining high recovery without membrane scaling....

Case studies on reverse osmosis systems experiencing unexplained rejection loss with deep well water sources. Comparisons are assessed between sites with similar water sources that run smoothly and ones that experience problems....

As membrane treatment becomes a popular and cost-effective choice to meet ever-growing drinking water regulations and ever-worsening source water quality in the Mid-West, optimizing the membrane pretreatment approach becomes extremely important. This presentation will cover the aspects of the membrane pre-treatment evaluation, with an emphasis on ...

I have not seen one instance of the MFI used in practice for characterizing the fouling potential of membrane treatment system feed water, despite the potential benefits over SDI, in my 10 years of engineering experience with membrane treatment systems. Only recently have I heard MFI even mentioned at a conference. Since SDI testing has been an ind...

This presentation will provide data specific to the mid-west on water treatment considerations and benefits when evaluationg reverse osmosis or membrane softening. Water supply, pilot study, pretreatment, process design, operation and maintenance and data collection will be addressed....

This presentation will provide data specific to the mid-west on water treatment considerations and benefits when evaluationg reverse osmosis or membrane softening. Water supply, pilot study, pretreatment, process design, operation and maintenance and data collection will be addressed....

The City of Signal Hill's nanofiltration plant was designed and built primarily for color removal and some total dissolved solids reduction. The plant was successfully built and started up over two years ago. After more than one year of operation the plant was cleaned for the first time. This paper will present information on the plant design and o...