Case study of a Dare County, North Carolina Water Treatment facility challenged with arsenic removal to prevent public health concerns. Report outlined how the use of second pass nanofiltration was highly effective. Nanofiltration was deemed the superior treatment technology as it did not produce a highly concentrated waste stream that results fr...

This paper presents the results of the analysis of alternative membrane plant design approaches to meeting three water quality specifications. This document provides meaningful guidance regarding the differences in design alternatives and costs to meet differing water quality goals. It also provides updated feasibility level cost estimates for two ...

Presentation of the use of surface water discharges as a means of disposing of membrane water treatment concentrate in Florida. Data is presented that verifies that surface water discharges are a leading alternative in Florida. The economic benefits are noted as well as current permitting procedures to establish regulatory acceptance....

An account is provided of performance testing conducted to evaluate media filtration and ultrafiltration pretreatment for seawater systems with mixed source waters. Media filtration was found to be effective in limited applications and source water dependent. Ultrafiltration determined to present various operational issues but did provide added p...

This presentation discusses drivers for desalination in Florid and Texas. The Tampa Bay 1 seawater plant is covered as well as overviews of each desalination effort around the state. A shift to Texas desalination covers the political willingness to move towards desalination and the initial proposed facility. Texas and Florida observations are also ...

The Bureau of Reclamation has released (November, 2005) sixteen projects and dedicated millions of dollars to national desalination research investigating issues such as slant well technology, electrocoagulation pretreatment, zero-liquid discharge and wind powered desalination. This paper provides background on initiatives such as Water 2025 and Pr...

Post-treatment of desalinated water using calcite contactors....

Tampa Bay Water owns a 25 MGD Seawater Desalination Facility on the West Coast of Florida to treat seawater from the Gulf and sale the water to the six governments (3 cities and 3 counties). In the past, performance of the seawater facility has not met the goals set by Tampa Bay Water. In order to improve performance, Tampa Bay Water went through ...

Taste and odor problems are a key factor determining water quality in the eyes of the consumer. Two compounds typically related to taste and odor issues are MIB (2-methyilsoborneol) C11H20O and Geosmin C12H22O. These compounds come from Blue - Green Algae and Cyanobacteria generating an earthy musty smell that can be detected in concentrations as l...

This paper describes an inventive program implemented by Islamorada, Village of Islands to plan, permit, design and construct a new central sewer system connecting existing residential and commercial property on Plantation Key, including a new 0.250 MGD-AADF advanced wastewater treatment plant utilizing MBR technology. MBR have proven to be a super...

This paper provides an innovative detailed design approach to right inadequate design, control features and deteriorating wells while optimizing performance from Reverse Osmosis Membranes....

Planning and implementing a seawater desalination plant is a complex process and requires action in many areas such as technical feasibility, design, funding, environmental considerations, public involvement, permitting and others. Pre-treatment of a seawater facility is one of the most important technical aspects of a seawater project. Selection...

This powerpoint addresses water supply planning in the Bahamas and the use of reverse osmosis membrane technology, as part of a potable water franchise, to treat either brackish surface or groundwater or seawater....

The requirement for more stringent control of water quality from reverse osmosis water treatment facilities is being seen more and more in municipal potable water systems. In addition to the traditional goal of salt removal, today's standards call for a stable finished water that does not cause adverse distribution system reactions due to the chang...

Clearwater, Florida Brackish Groundwater Addition using RO Technology...

Nanofiltration Membrane Effect in reducing Disinfection Byproduct (DBP) Formation...

This presentation discusses prgrammable logic controllers, input and output modules, central processor, and the steps required to program. Examples of screenshots are given, sillustrating the programming steps....

This PowerPoint presentation describes how pilot testing can be used to increase product recovery in a membrane plant...

The City of Bowling Green Water Treatment Plant (WTP) was recently expanded with the addition of an Integrated Membrane Facility (IMF), consisting of microfiltration followed by reverse osmosis membrane treatment. The previously existing treatment consists of conventional ferric chloride chemical treatment, lime softening, multimedia filtration and...

Paper chronicles the City of Port St. Lucie?s 2011 Reverse Osmosis membrane replacement process which included significant pilot testing. Piloting was conducted to achieve chemical reduction, process optimization, energy reduction and improved water quality. The result of this work ultimately resulted in a reduction in treatment cost of $0.06 per t...

This presentation provides a historical perspctive on membrane devlopment, a present view of the state of the membrane installed base in the USA at time of presentation, and thoughts on what future membrane technologies may be tasked with accomplishing....

The City of Vero Beach and Reiss Engineering replaced 10-year old 8.5 inch diameter membranes in an existing 2 MGD reverse osmosis skid with more efficient modern elements in order to save energy while maintaining the same rejection performance. This article presents the steps taken to evaluate and select a replacement membrane and the associated b...

Based on over pumping, saltwater intrusion, or contamination from nutrient loading, studies are indicating that aquifers in these states are being taxed to unsustainable levels. Utilities then must find new treatment methods or alternative sources of water such as brackish or seawater. The public perception that Desalination is expensive though is ...

This presentation covers the basics of Concentrate Management including the systems producing concentrate, the general range of concentrate quality by source water, and the primary concentrate management options available to utilities today....