Presentations by Sunny Wang
Matches: 9
Pretreatment Optimization for an Impaired Groundwater Supply
To offset imported State Project Water, the City of Santa Monica is resuming the use of local, impaired groundwater resources contaminated with MTBE and TBA. Using membrane softening, these contamnants are effectively removed. However, ambient iron and manganese levels prematurely foul the softening membranes. Optimized green sand filtration with...
Is Recovering Energy in Low Pressure RO Systems Worth It?
Is recovering energy in low pressure RO systems worth it? The energy consumption of RO process itself accounts for 80% of the overall energy consumption of the facility, and cost of energy accounts for approximately 50% of the annual operating costs. The economics would very much depend on the amount of energy that is recoverable and, more import...
Source Water Control Strategies to Ensure Treatment Reliability at Orange County Water District's Groundwater Replenishment System
Orange County Water District's (OCWD) Advanced Water Purification Facility (AWPF) treats secondary municipal wastewater effluent using MF, RO, and ultraviolet (UV) and hydrogen peroxide in an Advance Oxidation Process (AOP). Source water variations can impact performance and reliability by operation of secondary biological treatment trains and by ...
Performance Testing of the Silicon Valley Advanced Water Purification Center?s 8 MGD Integrated Membrane System to Expand Reuse and Reliability
The Santa Clara Water District with the City of San Jose, CA commissioned the Silicon Valley Advanced Water Purification Center (SVAWPC). The state of the art facility treats secondary effluent from using an intergrated membrane system (IMS) consisting of mictofiltration (MF), reverse osmosis (RO), followed by ultra violet (UV) disinfection. Paper...
Optimizing RO Systems to Restore Brackish Groundwater Supplies
This paper describes efforts by the City of Santa Monica (City) for groundwater restoration program to reduce its reliance on imported water supplies and maximize local resources. With the completion of the Charnock Well Field Restoration Program in 2011, the City was able to reduce its reliance on imported water supplies from 90% down to approxima...
Use of Preformed Chloramines to Minimize NDMA Formation Potential for Potable Reuse APPLICATIONS
N-nitrosodimethylamine (NDMA) has long been recognized as one of the key contaminant of concern for potable reuse (NRC, 2012). Utilities currently operating advanced water purification facilities (AWPF) for indirect potable reuse (IPR) have implemented various strategies, including source control, diversion of sidestream return flows, or use of al...
How Much Concentrate Can You Squeeze With Closed Circuit Desalination and What to Consider
A traditional two-stage RO system was coupled with a 3rd-stage, semi-batch RO process to increase overall recovery above 92%. The CCD process was integrated as a 3rd-stage as it could achieve higher recoveries due to its cyclical operation pattern, ability to achieve higher cross-flow velocities through recirculation of the concentrate stream, and ...
Delivering a Sustainable Water Supply Through Membrane Technologies
Climate change impacts, such as higher average temperatures and prolong drought conditions, have affected regional and local water supply reliability. The City of Santa Monica has long been a leader in promoting sustainability and is implementing several innovative water supply projects that leverages membrane technologies to develop alternative wa...
Delivering a Sustainable Water Supply Through Membrane Technologies
Climate change impacts, such as higher average temperatures and prolong drought conditions, have affected regional and local water supply reliability. The City of Santa Monica has long been a leader in promoting sustainability and is implementing several innovative water supply projects that leverages membrane technologies to develop alternative wa...