Ultrafiltration (UF) technology is widely applied for treatment of surface water and ground water under direct influence sources due to the ability to consistently and reliably remove pathogenic organisms and suspended solids to produce high quality filtrate. Smaller-scale utilities often have unique constraints and fewer available resources, which...

Membrane Bioreactor (MBR) technology is a well-established means of enabling the reuse of wastewater and is an ideal technology for potable water reuse due to the robust pathogen reduction, ability to enable cost savings for end users and the water quality produced for direct feed to downstream unit operations. Despite several successful applicatio...

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 ...

The presentation will provide an overview of the St. Vrain Water Treatment Plant (SVWTP), a greenfield WTP in Firestone, CO. Presentation topics will include: 1. Overview of regional water supply and the driver for the SVWTP. 2. Analysis leading to an integrated membrane system including raw water quality, bench scale testing, and LC-OCD testing. I...

Project 7 Water Authority (P7WA) evaluated pellet softening as pretreatment for ultrafiltration (UF) for a surface water with low TOC but very high hardness at the pilot scale. In addition to demonstrating a successful membrane treatment process, this study provides an example of key piloting steps, from identifying project drivers and defining tes...

In 2016, the Clifton Water District (CWD) finished a project to replace their 1980’s era media filters with ultrafiltration membrane technology. The $15 million project included retrofitting a 12 million gallon per day membrane filtration system inside of an existing filter building. The membrane system has been designed in an “Open Platformâ€...

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Membrane filtration plants are complex systems which involve monitoring of varied types of data for performance and maintaining operations. This presentation willl present the different types of data encountered in treatment plants and how each type is used to monitor the system and react to changes. Examples from Colorado treatment plants and SC...

The City of Thornton transistioned from ferric chloride to aluminum chlorohydrate coagulant in 2019 and has seen specific flux/temperature corrected permeability (TCP) values return to what was observed after 2-4 years of use with ferric chloride in membranes in their 7th to 9th year of use. The City continues to optimize coagulant dose for TOC rem...

The Rueter-Hess Water Purification Facility is a state-of-the-art treatment plant which utilizes ceramic micro-filtration membranes for pathogen removal. From the commissioning in 2015 to today, many lessons were learned about the impacts that proper pretreatment can have on the permeability of our membranes. We will share some hard learned do's ...

This presentation focuses on the types of fouling that are currently being experienced at a variety of MF/UF membrane plants in the Midwest. The discussion includes how the foulant materials are setting up in the MF/UF membrane elements and how the autopsy process is being used to identify foulants and provide solutions for their removal. Several ...

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Membrane Gravity Filtration (MGF) is an application for retrofitting gravity media filters using ultrafiltration membranes. It combines the simple operation of a media filter with the superior treated water quality of a UF membrane. MGF is best suited for applications where customers need better turbidity removal, a barrier to pathogens, or need ...

This presentation presents the progress and applications of MBRs which provides the benefit of biological treatment process in a compact footprint and solids liquid separation for a high-quality effluent. In this paper, lessons learned and challenges from design and operation of MBR plants are presented. MBRs provide the pretreatment required for o...

An overview of several typical issues that plague MBR systems, and how to troubleshoot them. The presentation will also include a quick overview of common design issues we run into that can contribute to operational issues....

This presentation is a wastewater treatment case-study of an existing sequencing batch reactor (SBR) retrofit with a Membrane Bioreactor (MBR). AQUA Engineering is pleased to discuss the Project's workflow, including review of project drivers, alternatives analyses, and reasons for the selection and implementation of MBR technology....