Overview of State of Colorado and US Federal drinking water regulations as they pertain to ultrafiltration and microfiltration water treatment facilities. Emphasis is provided in relation to the promulgation of the disinfection by products rule and the surface water treatment rule....

This paper compares membrane treatment to conventional treatment in municipal and industrial applications....

This presentation discusses the pilot study results for the Canyon water treatment plant in the city of Azusa CA. Also discussed is membrane basics, evaluation and water properties. In the actual case study the reader is walked through the decision making process including several side by side pilot tests. Results are then compared looking closely ...

Discussion of concentrate disposal handling for desalination RO facilities....

Paper summarizes a pilot program that was conducted for Marin Municipal Water District (MMWD) on San Francisco Bay, California water. The seawater RO desalination pilot program compared two pretreatment technologies: 1. Conventional Pretreatment with coagulation, clarification, and granular media filtration to 2. Membrane Filtration with microfiltr...

The City of Goodyear is using RO to reduce the TDS level in the well source water to achieve potable water with TDS < 750 mg/L. The concentrate is currently being discharged into the wastewater treatment plant. As the City grows there is concern that the brine will adversely impact the wastewater treatment plant. This paper summarizes the techni...

The focus of this case study is the City of Palm Coast's Water Treatment Plant No. 2, which utilizes membrane softening technology. As a result of regulatory policy changes mandated by USEPA, the City's surface water discharge permit for concentrate disposal has had to be completely changed in order to achieve a successful long term permit renewal....

The goal of this paper is to give an overview of the Toxicity Identification Evaluation process for facilities utilizing membrane technologies and to provide some practical guidance on how to make it as efficient as possible, thereby saving time, resources, and frustration....

Membrane bioreactors (MBRs) have several advantages over conventional treatment technologies using tertiary filtration. This paper covers some of the fundamentals of MBR and includes comparative information for evaluating common membrane technologies used in MBR applications....

This paper provides a brief history of membranes, the characteristics of the different types of membranes, and the exponential growth in the number of installations. Applications for water, wastewater treatmentwater reuse and desalination, and the challenges that membrane treatment processes face are also presented. The presentation will conclude w...

This paper will discuss the Inland and Coastal issues for desalination plants, including intakes shared with electric power plants, and shall propose innovative concentrate reuse technologies...

Environmental issues of entrainment and impingement can be significant drivers in the development of a coastal desalination facility. A variety of intake options were evaluated for the proposed Santa Cruz CA project. Depending upon the local hydro-geological conditions, feasible options for the project include an infiltration gallery and horizont...

This paper compares side by side two main classes of water bodies that receive concentrated brine discharge from Reverse Osmosis (RO) Desalination Plants: oceans (or open seas) and estuarine bays (under the influence of fresh water). These two classes of water bodies have inherent properties which drive not only the operation of RO plants, but also...

This presentation will provide a brief recap on RO technology current status, trends in RO developments and potential combination of using RO with FO technology....

This presentation covers design and operation of new 10.0 MGD Reverse Osmosis (RO) membrane water treatment plant in Hutchinson, KS. The source water includes remediation groundwater and part of the funding for the project is from the payment made by companies responsible for contaminating the groundwater. Lessons learned include the need for s...

This presentation discusses the retrofit of an existing wastewater treatment bplant with Membrane bioreactor technology. Discusses design and permitting, contractor schedule. Provides project costs, dynamic changes to accommodate hidden conditions. Presents changes made to fix unexpected conditions. Presents operating data....

This PowerPoint presentation describes electrical rates and how to minimize costs...

The energy requirement of seawater desalination is a key issue faced by water utilities that are interested in evaluating desalination as a source of potable water. To understand the amount of energy required to operate a proposed desalination facility, it may be helpful to consider the facility?s energy use in terms of more familiar residential an...

The City of Gearhart commissioned an ultrafiltration system which utilizes an arsenic co-precipitation step with ferric chloride prior to final filtration with the UF. A modified cleaning strategy is presented in order to address ferric in the feed, and legal constraints associated with reduced flow periods....

This paper presents the operating and performance results for the first 13 months of operation at the City of Gearhart?s water treatment plant. Membrane hydraulic performance is discussed with respect to the following: ferric chloride dose, variation in plant production due to water rights restrictions, maintenance cleans, and clean-in-place clea...

A seawater RO pilot study conducted at the City of Santa Cruz was conducted to evaluate treated water quality and integration into an existing potable water distribution system. Communication efforts with regulators and the community are outlined as well as a summary of "what could have been done differently"....

To address the issues of an aging WTP and licensure requirements, the Wiamea WTP began a project to upgrade its plant with membrane filtration to reliably produce 4 MGD. A demonstration study occurred to confirm produced water quality and introduce operators to membrane filtration processes. With only 2.0-log Giardia removal credit given, there hav...

As fresh water supplies become more limited, industry and municipalities are demanding greater treatment efficiency and resorting to alternative water resources that are often too difficult for traditional water purification methods to treat effectively. Reverse Osmosis (RO) is the standard for water purification and reuse, but it?s a 40 year old t...

Contamination of membrane systems treated water from clean-in-place (CIP) chemicals is un-avoidable. Citric acid is of particular concern as it will react with chlorine disinfection in the downstream process resulting in formation of DBP. In order to estimate the quantity of citric acid carryover at a WTP, a series of bench-scale tests were conduct...