Presentations by Gabriela Handley
Matches: 6
Silt Density Index: A Fresh Perspective on an Old Index
This paper demonstrates the need for consistency in the use and selection of silt density index (SDI) filter pad chemistries by membrane treatment plant operators for their specific facility. While it is not the authors? intention to identify the ?best? filter pad for use in the SDI test, the findings will illustrate the need for a thoughtful cons...
Time to Clean Again? Changes in Cleaning Frequency and Effectiveness at the Richard A. Reynolds Groundwater Desalination Facility
This paper presented past and present operational data from the Richard A. Reynolds Groundwater Desalination Facility (RAR) in Chula Vista, CA operated by the Sweetwater Authority. Potential areas for optimization are identified including an evaluation of the clean in place (CIP) process, for the effectiveness of the current Reverse osmosis cleaner...
A Unified Backwash Approach for Multiple Modules on West Basin?s Custom Engineered Microfiltration Pilot
West Basin's Custom Engineered Microfiltration Pilot Unit has been in service for over a year now testing six different pressurized PVDF modules in parallel using West Basin's Title 22 water as a feed source. The results of Phase 1 of testing, which involved piloting these modules using manufacturer recommended sequences for backwashes, CEB, and CI...
Custom Engineered Membrane Filtration Pilot on Ozonated Secondary Effluent Water as a Source
The water reuse industry has transitioned from proprietary microfiltration (MF) systems to MF systems designed by original equipment manufacturers (OEM) that can be adapted to operate a handful of membrane module types. These ?Universal? systems rely on OEMs to dictate generic operating parameters. West Basin has constructed its own pilot system to...
Maximizing Recovery of an Existing Municipal Groundwater RO System: Piloting of the Desalitech System
The City of Oceanside?s Mission Basin Groundwater Purification Facility (MBGPF) is an existing facility operating at 75% recovery, whereby 75% of the feedwater becomes permeate (product) and 25% is the concentrate (brine) stream. The City is currently piloting the Desalitech process which is anticipated to achieve up to 75% recovery of the Primary ...
RO System Flux Balancing - Design Considerations and Operating Experience
Many new RO systems are including equipment and controls to provide flux balancing. In our experience, the proper application of flux balancing is not well understood by the RO design community and can be misapplied or provided with inadequate controls for flexible operation of the RO system. This presentation will help educate RO system designers ...