Presentations by David MacNevin, PhD, PE
Matches: 7
Post Treatment Optimization for Desalination and Groundwater Recharge
This paper presents three studies of post treatment of membrane treatment, with a focus on more than a dozen lessons learned from the following three desalination and groundwater recharge facilities: Clearwater, FL Groundwater Replenishment (GWR) Project, San Antonio Water System (SAWS) Brackish Groundwater Desalination (BGD) Program , Tarpon Spri...
Extending the Useful Life of a 15 MGD Rio Grande Ultrafiltration Facility
The City of Eagle Pass, Texas draws its water supply from the Rio Grande treating the river water through a 15 MGD ultrafiltration treatment plant. After 10 years of operations with 35m 2 ultrafiltration membranes, the City is planning to replace its membranes with a newer 40m 2 membrane model. This presentation will provide an update on Eagle Pass...
Protecting Membranes in Advanced Water Treatment: Effective Management of Chloramine and Peroxide Residuals
Chloramines and peroxide are used for biological fouling control and advanced oxidation in advanced water treatment, but both chemicals can have unintended impacts on membrane performance if not kept under control. This presentation shares practical insights for operating three types of membranes in a potable reuse process, with a view to the impac...
Advancing the Development of Direct Potable Reuse in Florida: Construction of a Full-Scale Demonstration Facility nears Completion
The purpose of this presentation is to provide a construction update of the Daytona Beach Demonstration Scale Direct Potable Reuse Facility. After one year of an accelerated construction schedule due to meeting funding requirements, the conference time frame will provide an opportunity to present the challenges, successes and obstacles overcome dur...
Finding a Path to Membrane Pricing Competition for Replacement and Expansion of a 15-MGD Horizontal UF System
Provides an update on EPWWS's experience regarding membrane replacement, including the approach to obtaining TCEQ approval, direct integrity testing, lessons learned, and operational implications....
Doubling Down on UF Process Innovations - Design of an Interchangeable Rack UF System With Direct-Coupled Downstream RO
This presentation will provide valuable information regarding the design of a 4.0 MGD UF/3.0 MGD RO integrated membrane system to be applied as a potable reuse facility. Information will be provided regarding the nuances of an interchangeable rack UF system design that will be beneficial for those looking to implement a non-proprietary UF system fo...
Advancing the Development of Direct Potable Reuse in Florida: Operational Results from a Full-Scale Demonstration Facility
The purpose of this presentation is to provide an update on the first 6 months of UF and RO membrane performance at the Daytona Beach Demonstration Scale Direct Potable Reuse Facility. The presentation covers observed pathogen LRV performance distributions, membrane fouling control, chemical cleans in place, disinfection byproduct formation potenti...