Presented for a regulator's perspective, the expected protocol for permitting a new membrane water treatment facility is offered....

This presentation considers regulatory issues regarding seawater/ocean desalination in California, including past projects, role of California Dept of Health Services (now called Dept of Public Health), permits required by various agencies, applicable agency documents and rules, pathogen removal, emerging contaminants and boron, and piloting....

With the commissioning of the30 UK-MGD (135,000 m3/d) Tuas Desalination Plant in September 2005, seawater/ocean desalination via reverse osmosis (RO) has become the 4th Tap for a diversified water supply system in Singapore, providing about 10% of the source water. The other three are: local surface water, imported surface water, and reclaimed wate...

The utilization of RO to achieve emerging contaminant control for indirect potable reuse is commonly accepted in California. Emerging contaminants, also frequently called constituents of emerging concern (CEC) include a wide and diverse spectrum of potential contaminants. They are ?potential? contaminants because they are currently unregulated, but...

This presentation provides an overview of the regulations concerning approval and operations of membrane treatment technologies in Oregon....

Promoting membrane technology through quantitative risk assessment for public health. Risk assessment of cryptosporidium in drinking water and membrane removal vs conventional treatment. Risk assessment of TTHMs removal from drinking water and number of cancer cases prevented per one million consumers....

This presentation provides an overview of the regulatory framework related to the use of membranes in the State of California. California's permitting process for new treatment facilities and the certification requirements are described. There is also reference to performance and integrity testing requirements are described and some of challenge...

This PowerPoint gives an overview of the Southmost Regional Water Authority Brackish Groundwater Membrane Treatment Facility...

Overview of Cape Fear Public Utility Authority nanofiltration facility built to address TOC, iron, manganese, hardness, and disinfection byproduct formation potential. 1.5 mgd facility operating at 80% recovery. Iron and manganese fouling addressed through improvements to cleaning process....

This presentation provides an overview of concentrate management at Palo Verde Nuclear Generating Station. It covers regulatory issues related to water and air and summarizes where water and air rules collide and the implications of these overlapping regulations related to treatment of cooling water. The study concludes that influent TDS trends m...

This papers discusses the Singapore PUB's NEWater, a potable drinking water that is produced from reclaimed water that has been purified using advanced membrane technologies. NEWater is produced via a multi-barrier treatment process that includes Micro- or Ultra-filtration, followed by Reverse Osmosis (RO) and finally UV disinfection. discussed ar...

This paper discusses the development of a new integrated process composed of biological activated carbon/coagulation/microfiltration/dedicated RO. The objective was to recover 25% RO brine generated from the current water reuse facility and to enhance the overall water recovery from the current 75% up to 94% in a water reuse application. The paper ...

This paper presents the results from a twelve-month pilot study using ceramic membranes on Lake Michigan water in a sustainable manner with a flux of 103 gfd (175 lmh), with chlorinated and acidic chemically enhanced backwashes, and with pre-treatment with polyaluminum chloride coagulation. They estimate that the cleaning interval could be up to 10...

The presentation is intended to provide a brief history and overview of the Johns Creek Environmental Campus prior to a tour of the facility. The topics covered in the presentation will pertain tothe plant's background, construction, key treatment processes, and "good neighbor" aspects....

This presentation will address how RO is a critical treatment process barrier for groundwater recharge injection projects, Surface Water Augmentation, and Direct Potable Reuse. RO is effective at removing microorganisms and organic chemicals (including Contaminants of Emerging Concern or CECs) that may pose a public health threat. There are speci...

The Surface Water and Treatment System facility consists of lime-softened clarification, dual media filtration, ultrafiltration membrane filtration, and reverse osmosis (RO) membrane treatment. This system treats water from Lake Granbury in Granbury, Texas, which has elevated levels of chlorides ranging from 50 to 1,400 mg/L. As designed, the syste...

In potable reuse, reverse osmosis (RO) is important for system-level salinity management and as a pathogen barrier in the treatment train. Scaling is a key driver of cost for RO systems because it increases energy use and leads to more frequent cleaning and replacement of membrane elements. Phosphate-induced scaling in particular has been identifie...

Designing a membrane plant with the right parameters ensures that finished water production and water quality goals are achieved while minimizing unforeseen, premature and costly membrane module replacements. However, even with pilot testing, it is challenging to predict the impacts of seasonal or long-term changes in raw water quality and the eff...

This paper provides a summary of the membrane evaluation, condition assessment, evaluation results, design considerations for the system upgrade and a discussion of several items found during commissioning....

TENORM (Technologically Enhanced Naturally Occuring Radioactive Materials) are naturally occurring radioactive material whose radionuclide concentrations are increased by or as a result of past or present human practices. These materials can be generated as part of Oil and Gas exploration and production activities or any other industrial process t...

This paper will present bench test and full scale results and discuss key challenges of implementing bench test findings at full scale in the context of the case study demonstration tests.Utilities that treat surface water and utilities that are planning conversion from iron based coagulants to aluminum based coagulants will gain knowledge into imp...

Brazos Regional Public Utility Agency Surface Water and Treatment System completed bench test and resultant full-scale implementation for pretreatment coagulant changes from iron-based to aluminum-based coagulants. This includes optimization of clarification followed by membrane filtration and the change of operation from coagulant, flocculation, s...

I will cover the process and timeline of alternative technology acceptance in Colorado. This will discuss the history of membrane use and acceptance in Colorado, how the technology acceptance process has evolved over the years, the current state of membrane use in the state, and other specific technological issues with membranes and drinking water ...