Testing standards for membrane treatment efficacy are defined and reviewed through test results. Steps to gain greater technology acceptance throgh integrity verification are suggested....

This presentation discusses a pilot-study evaluation at the Marden Water Treatment Plant in Boise, ID of an ion exchange resin dosed in line with a pressure driven ultrafiltration membrane in the context of NOM removal, membrane flux and fouling....

This manuscript presents the results of two pilot studies used to evaluate the minimum monitoring proposed under the 2003 draft version of LT2ESWTR. It also describes the role of alternate indirect methods in maintaining system performance and protection of public health....

This presentation provides the critical operational variables identified in the US EPA Membrane Filtration Guidance Manual, and described how these variables are used in calculating a log removal value (LRV) through a low pressure membrane system. This will provide operators with an understanding of how operating variables (flow, transmembrane pres...

The plant is the first 98% recovery membrane filtration plant to receive the maximum 4-log disinfection credit for cryptosporidium...

Integrity testing for Microfiltration (MF) and Ultrafiltration (UF) membranes and reasons for conducting test. Direct and indirect testing techniques and how to interpret results. Designing to avoid membrane integrity failures and factors that impact integrity loss....

this presentation introduces the listener to the basic description of membrane filtration and membrane bioreactor theory and practice. Equations are provided, together with simplified process flow diagrams. The difference between outside in and inside out water flowpath is explained....

This presentation discusses indicators for microfiltration (MF) and ultrafiltration (UF) membrane module replacement, presents replacement case studies, provides a summary of lessons learned, and highlights recent developments in system design that allow for increased flexibility during module replacement. The three case studies include a discussio...

Three original equipment manufacturers (OEMs) were invited to OWA?s filtration plant to attend a walk through and to provide proposals. Each OEM had agreements with membrane module suppliers providing modules of similar dimension, membrane surface area, backwash and cleaning strategies, and chemical compatibility....

The Oden Water Association installed an open platform style microfiltration treatment system to allow competitive bidding of replacement ultrafiltration membranes. The open platform style allows flexibility in operation in backwashing, and a custom configuration of plant support facilities....

Recovery of wastewater from the low pH clean in place of a UF/MF membrane plant can increase plant operating cost. By adding phosphoric acid and calcium to the wastewater calcium phosphate is formed and precipitated The decanted water can then be sent to the head of the plant, reducing the volume of CIP waste to be treated by 75%. This savings redu...

Replacement of media filters with an open platform UF system. Discusses specification preparation, procurement details and interchangability of UF modules for future replacements....

Minimizing the irreversible fouling of low pressure membranes requires cleaning regimes that typically consist of three different types of membrane cleans: Chemically Enhanced Backwash (CEB), Maintenance Cleans (MC), and ? Recovery Cleans (RC). This paper details three case studies on CIP system design and pilot study work to evaluate fouling and...

In 2015 the Clifton Water District completed a project to convert the its 34 year old, shallow bed media filters at its drinking water treatment plant to a more robust and reliable membrane filtration system. The conversion took place without interrupting water service to its customers over the 10 month period between ground breaking and the membra...

This paper discusses the phasing and pretreatment considerations for the Clifton Water District (CWD) project to convert the 12 MGD of granular media filters at its drinking water treatment plant to a membrane filtration system. The conversion took place over the 10 month period between ground breaking and the membrane system was put into service....

The field of commercially available membrane products is vast and expanding. In the early 2000's the majority of the market share was held by 3 to 4 suppliers each offering a single product. Driven by demand to meet more challenging applications, these suppliers expanded their offerings to new membrane polymers and hydraulic configurations. Today,...

The field of commercially available membrane products is vast and expanding. In the early 2000's the majority of the market share was held by 3 to 4 suppliers each offering a single product. Driven by demand to meet more challenging applications, these suppliers expanded their offerings to new membrane polymers and hydraulic configurations. Today,...

Construction of the 28 million gallon per day (mgd) Baker Water Treatment Plant (BWTP) will be completed in October 2016, allowing the Irvine Ranch Water District and its five partner agencies El Toro Water District (ETWD), Moulton Niguel (MNWD), San Margarita (SMWD), Trabuco Canyon Water District (TCWD), and Metropolitan Water District of Orange C...

The City of Ventura, CA has taken a proactive approach to further advancing potable reuse as an alternative water supply, with the VenturaWaterPure Demonstration Facility serving as a critical component for demonstrating technical and regulatory feasibility and public acceptance. The demonstration facility included pasteurization, ultrafiltration (...

The presentations will highlight key design concepts for MF/UF systems as well as considerations for intergating MF/UF systems into a water treatmentprocess train. The presentation will introduce the audience to flux selection, rack sizing, flow control concepts, CIP system design, and residuals handling considerations....

The field of commercially available membrane products is vast and expanding. In the early 2000's the majority of the market share was held by 3 to 4 suppliers each offering a single product. Driven by demand to meet more challenging applications, these suppliers expanded their offerings to new membrane polymers and hydraulic configurations. Today,...

This abstract will give an update on design and procurement of Florida's largest low-pressure membrane facility: i.e., 54-mgd ultrafiltration (UF) retrofit at Lake Manatee Water Treatment Plant in Manatee County. This project also reflects the largest planned UF retrofit in the US. The project includes refinements of existing pretreatment system, a...

This abstract details the activities, problems and solutions encountered during the start up of a 28-mgd base loaded MF facility. This paper will detail the issues that were found and how to best deal with them. We also had an issue with membrane plugging on all 14 racks. This required enhanced CIPs and module isolation to restore permeability. Thi...

Membranes are used in wastewater treatment for a number of purposes including meeting stringent discharge water quality standards, tertiary filtratration for non-potable reuse and nutrient removal and for potable reuse applications. Drivers for membrane use and the membrane technologies used to treat water for these applications will be covered in ...

The City of Boise is conducting a pilot study of hollow fiber MF/UF membrane technologies at its West Boise Water Renewal Facility (WBWRF). The pilot study is investigating removal of phosphorus by coagulation and membrane filtration. The work is being done to support planning for plant improvements requried to comply with reduced phosphoruis disc...

An overview of membrane system design concepts and methods, supported by experience with real-world projects....