This presentation presenst the problems associated with placing on line different water supplies, particularly with emphasis on blending existing groundwater supplies with surface water and desalinated brackish water and/or seawater supplies and the impacts on chemistry and existing infrastructure that will results. Mitigation concepts are presente...

Paper presents an overview of RO and NF membrane processes and fouling, describing biofouling, how to apply forensic methods, including membrane autopsy methods to determine the extent of fouling, as well as how to design and operate plants to avoid fouling. Analytical method applied include loss on ignitian, scanning electron microscopy (SEM), tar...

This excellent presentation covers all the basics concerning reverse osmosis system operation. Starting from pretreatment, it covers the physical state f water including dissolved substances, solubility of limiting salts, langelier saturation, scale and silt density. Other areas also include concentration polarization and all the various types of m...

The purpose of this presentation was to present the problems associated with placing on line different water supplies; particularly with emphasis on blending permeate water into existing water systems. Also discussed is integration of membrane treated groundwater supplies with surface water and desalinated brackish water and/or seawater supplies an...

This PowerPoint describes recent advancements in Membrane Technology in 2009...

This presentation focuses on desalted permeate conditioning and handling and specifically addresses permeate stabilization, distribution system impacts, degasification and air stripping, alkalinity and disinfection. The presentation also summarizes the findings of Water Research Foundation Project 4079, "Post treatment Stabilization of Desalted Pe...

This powerpoint provides a tutorial on nanofiltration and reverse osmosis membrane processes, osmotic pressure, fouling and cartridge filter issues and membrane cleaning and replacement....

The presentation provides a brief history of membrane separation research....

This presentation will describe what is known about the presence of iodide and bromide in seawater and brackish desalted permeate produced by reverse osmosis (RO) water treatment plants. The presentation will also explore the amount of iodinated DBPs formed in desalinated seawater and brackish permeate streams produced from RO water treatment plant...

This presentation provides an overview of membrane filters and explains commonalities and differences between submerged and pressure membrane applications. Factors presented include pressure requirements, packing density, footprint, and hydraulic considerations....

This paper talks to the importance of optimizing pre and post membrane treatment to prevent downstream water quality issues....

This paper described efforts to integrate ultrafiltration into a conventional coagulation facility and the possible interactions of the membrane cleaning effort and backwash with the conventional treatment. Some of the limits for the backwash and cleaning chemicals on the effectiveness of the coagulation are determined....

This PowerPoint presentation describes the work done to investigate pretreatment of low alkalinity organic-laden surface water prior to a coagulation-ultrafiltration membrane process at the Olinda Water Treatment Plant on the island of Maui...

The use of synthetic membrane processes for desalination and production of drinking water has increased over the past five decades primarily in coastal areas with limited freshwater sources. Desalting techniques are primarily intended for the removal of total dissolved salts (TDS) that generally cannot be removed by conventional treatment processes...

In this work (partial results) a series of jar testing experiments were conducted to identify the impacts of tricarboxylic citric acid on the effectiveness of aluminum sulfate and ferric chloride coagulants. Acetic acid, a monocarboxylic acid, was also evaluated for the purposes of comparison with citric acid. Citric acid was found to adversely aff...

The purpose of this paper to present the findings of a research study developed by the Town of Jupiter and the University of Central Florida (UCF). Research was conducted to address the in-plant blending operations, distribution system corrosion issues, and disinfection separately. A description of the approach to corrosion testing is provided, w...

Membrane fouling is a limiting factor for the operation of UF processes and fouling management is critical for successful integration of UF technologies in water treatment. A new data analysis approach of transmembrane pressure balance (TMP balance) may improve data interpretation and operating decisions. Using flux data and different cleaning regi...

Florida leads the nation in the number of municipal potable water desalination plants with more than 140 producing more than 515 million gallons per day. Florida's water demand is expected to grow by greater than 25% to 8.7 billion gallons per day in 2025 and brackish water desalination will be a key to meeting this expected need. Florida reverse o...

Reclaimed water can be used to augment potable water supplies. There are no current regulations in Florida pertaining to direct potable reuse (DPR). The challenges includes a need for a uniform and acceptable vocabulary, understanding the health risk(s), technological needs, cost and the lack of a clear roadmap of when and how to develop a potabl...

Surface water fed ultrafiltration (UF) membrane backwash water is frequently recycled back to the front of the system to improve system recovery. The impact of recycled membrane backwash water is addressed and how to mitigate fouling of the UF....

This paper discusses the findings of experiments evaluating the rejection of compounds of emerging concern (CECs) via nanofiltration membranes. In addition a description of the Town of Jupiter NF facilities and pilot plant efforts are presented....

This paper describes research to evaluate the significance of thin-film composite membrane surface morphology on water productivity. Flat-sheet experiments were conducted with silicon dioxide, titanium dioxide, and cerium dioxide nanoparticles. The polyamide thin-film active layer exhibited a morphology that was directly related to the surface roug...

AMTA - USBR Fellowship Awardee: The following research involves optimizing a nanofiltration membrane process in Jupiter, Florida. The research involves optimizing membrane pretreatment, treatment, and post-treatment. This research is applicable to utilities operating with membranes. The presenter is also a recipient of the 2016 AMTA-USBR Fellowship...

The abstract describes the methodology of how a mass transfer model of the anthropogenic wastewater contaminant, caffeine, was created and validated. It also presents a general description of the results of the project. This abstract should be added to the program because it provides valuable insight regarding the transport of caffeine through a na...

Pharmaceuticals and other contaminants of emerging concern (CECs) are introduced to the environment from a variety of sources; effluents from centralized wastewater treatment plants (WWTPs) represent the primary source for loading to aquatic systems. Introduction of CECs to aquatic systems can contaminate surface and ground waters and thus present ...

An investigation into the occurrence of nanometer and micrometer range particles in the feedconcentrate channels of operating, production capacity reverse osmosis (RO) and nanofiltration (NF) membrane process was performed. Samples of the feed, permeate and concentrate bulk streams were sampled and submitted for particle analysis. Particle distribu...

An investigation into the occurrence of nanometer and micrometer range particles in the feedconcentrate channels of operating, production capacity reverse osmosis (RO) and nanofiltration (NF) membrane process was performed. Samples of the feed, permeate and concentrate bulk streams were sampled and submitted for particle analysis. Particle distribu...