Presentations by Winnie Shih, Ph.D
Matches: 7
Overall Desalination Plant Recovery Enhancement Through Brine Minimization for Inland Desalination Plants
The purpose of this study was to determine the hardness and silica removal efficiency of conventional lime-soda ash softening of the primary RO concentrate using a novel high rate thickening softener. The softened effluent will be polished by dual media filters prior to a secondary RO treatment, and silica-tolerant electro-dialysis reversal (EDR) i...
Optimized Brackish Water Desalination, TWDB, El Paso, TX
The use of energy recovery devices for RO desalination is presented....
Post-Treatment of Brackish RO Permeate via Upflow Calcite Contactors
Projected decrease in water supplies in Texas due to sediment accumulation in reservoirs and aquifer depletion have led state and regional water planning agencies to turn to brackish water in aquifers as an alternate water supply source to address rising water demands. Reverse osmosis is a viable treatment technology to treat brackish water to pota...
RO/NF Back to Basics Workshop: RO/NF Application
Presentation provides a very general overview of reverse osmosis (RO) and nanofiltration (NF) water treatment processes. In doing so, the basic concept of osmosis/membrane separation is described as well as the differences in treatment capabilities between RO and NF. The history and development of each technology is chronicled as well as current ap...
Mass-Transfer Modeling of RO Premeate Post-Treatment by Upflow Calcite Contactors
Reverse osmosis (RO) desalination may be used for desalination of brackish and saline waters, but the product water may have low concentrations of hardness and alkalinity, which may corrode infrastructure. Addition of pH, hardness, and alkalinity may be required to meet potable water guidelines. Upflow calcite contactors may be used instead of li...
Chino II Desalter Concentrate Management Via Innovative Byproduct Resale and Treatment
This paper discusses the design philosophy of the Chino II Concentrate Reduction Facility and the selection of appropriate treatment technologies to meet the challenges of scaling constituents in the concentrate stream....
High-Turbidity Backwash Waste Recovery for Potable Use at Surface Water Treatment Plant
A common complaint for water treatment operators when it comes to hollow-fiber MF/UF systems is the frequent repairs and production downtime needed for fiber breakage issues. At a Midwestern surface water treatment plant, treating backwash waste (variable turbidity) from the primary MF skid to increase recovery for potable water production is neede...