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....

The paper describes the efforts of Harn R/O Systems, Inc. and University of Central Florida pilot beta-test program to demonstrate the usefulness of Ultrafiltration for the treatment of a highly-organic Florida surface water supply in Manatee County to produce drinking water. The purpose of the study was to conduct a beta testing investigation of a...

The paper describes a study by the University of Central Florida for the City of Sarasota to determine whether sulfuric acid could be eliminated from the reverse osmosis process....

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 discusses testing aimed at controlling disinfection by-products originating from the Waikamoi Rain Forrest at the Pi'iholo Water Treatment Plant...

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 study investigated the treatment of an aerated groundwater using membrane technology. The raw groundwater contained elevated levels of sulfate and natural organic matter (NOM) which often pose challenges to membrane systems. The study includes pilot testing results of hollow-fiber and nanofiltration membranes designed to offer NF removal prope...

County of Maui Dept. of Water Supply with the Water Research Fouundation and the University of Central Fla. in project #4477 investigate pretreatment options at the Olinda WTP for controlling UF membrane fouling and examine impacts to the formation of disinfection byproducts (DBP). The research evaluated Magnetic Ion Exchange (MIEX?), GAC Adsorpti...

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...

Forward osmosis (FO) is an innovative membrane separation technology which has been used in wastewater treatment and food processing, and can be extended to algae dewatering for further bioproduct processes. Experimental trials on algae dewatering using a FO system have already been initiated (e.g., NASA OMEGA project). The FO system can reduce the...

Energy and water are essential to provide prosperity to any community in terms of municipal, agriculture and industrial areas. Microalgae has gained a lot of attention as a promising biofuel source and may also prove to be effective in the treatment of wastewater and CO2 sequestrations....

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...

The aim of this research is to solve a treatment problem of emerging concern by engineering a membrane with multiple functionalities to eliminate emerging contaminants without compromising the permeate flux resulting from fouling. The results of this project will help prepare the water industries for a class of contaminants to be potentially regula...

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 ...

This presentation discusses efforts by the University of Central Florida to assist the City of Boynton Beach in a review of their Nanofiltrations membrane plant activity. There is an assessment of pretreatment, the membrane process and post treatment with recommendations....

Harmful algal blooms are organisms that have potentially affected the quality of many water bodies around the world. In this abstract, the synthesis of a Quaternary ammonium (QACs) nanocoated fiberglass membrane, is presented as an effective mechanism of microbial control while avoiding the formation of harmful disinfection byproducts. The synthesi...

The aim of this research is to understand and model the transport of 1,4-dioxane (a chemical of emerging concern listed in EPA's CCL4) through a nanofiltration and reverse osmosis membrane. This presentation illustrates the means, methodologies, and results of mass the transfer of 1,4-dixoane through two membrane pilot units located in Jupiter, FL....

The U.S. Environmental Protection Agency’s (USEPA) Lead and Copper Rule (LCR) Revisions, which took effect on December 16, 2021, has motivated utilities to study their finished water corrosivity within their distribution systems. The City of Sarasota Utilities Department (City) retained the University of Central Florida, through the Department of...

The U.S. Environmental Protection Agency’s (USEPA) Lead and Copper Rule (LCR) Revisions, which took effect on December 16, 2021, has motivated utilities to study their finished water corrosivity within their distribution systems. The City of Sarasota Utilities Department (City) retained the University of Central Florida, through the Department of...

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...

...

...

...

...