Presentations by HDR, Inc.
Matches: 16
Incorporating Zeta Potential to Optimize Membrane Performance, Achieve Regulatory Compliance and Reduce Operating Costs
Automated zeta potential is rapidly expanding as a tool to regulate chemical dosing in water treatment plant processes. Zeta potential in combination with other inputs such as flow, pH, temperature and organics to minimize chemical cost and sludge disposal especially during rapidly changing conditions. This Presentation highlights incorporation o...
The FYI on CIP: Disposal of Spent UF Membrane Cleaning Solutions
Sustainable Ocean Intake and Pumping Facility for the Carlsbad Desalination Plant
The Carlsbad Desalination Plant (CDP), a 50 MGD seawater desalination plant, was originally co-located with NRG’s Encina Power Station (EPS) and the feedwater was withdrawn from the EPS thermal effluent discharge tunnel. The EPS terminated operations in late 2018, which required the construction of a new feedwater intake and brine dilution discha...
Sustainable Ocean Intake and Pumping Facility for the Carlsbad Desalination Plant
The Carlsbad Desalination Plant (CDP), a 50 MGD seawater desalination plant, was originally co-located with NRG’s Encina Power Station (EPS) and the feedwater was withdrawn from the EPS thermal effluent discharge tunnel. The EPS terminated operations in late 2018, which required the construction of a new feedwater intake and brine dilution discha...
Ocean Plan Amendment Compliance Carlsbad Desalination Plant Catches the First Wave
The Claude "Bud" Lewis Carlsbad Desalination Plant (CDP), pictured in Figure 1, has been operating for nearly 3 years, producing approximately 50 million gallons per day (MGD) to meet 10 percent of the City of San Diego’s daily potable water demands. The plant has been operating under a temporary State Water Quality Control Board (Water Board) pe...
Ocean Plan Amendment Compliance Carlsbad Desalination Plant Catches the First Wave
The Claude "Bud" Lewis Carlsbad Desalination Plant (CDP), pictured in Figure 1, has been operating for nearly 3 years, producing approximately 50 million gallons per day (MGD) to meet 10 percent of the City of San Diego’s daily potable water demands. The plant has been operating under a temporary State Water Quality Control Board (Water Board) pe...
Citywide Water Curtailment in Newport, OR - The Mystery of a Membrane Fouling That Created an Emergency Situation
The City of Newport, OR (City) operates a 6-million gallon per day (MGD) low pressure membrane water treatment plant (WTP). Starting mid-May 2020, the City experienced a rapid change in water production leading to an emergency situation four weeks later that caused a citywide water curtailment. Newport is a small town with a population of 10,000, b...
Citywide Water Curtailment in Newport, OR - The Mystery of a Membrane Fouling That Created an Emergency Situation
The City of Newport, OR (City) operates a 6-million gallon per day (MGD) low pressure membrane water treatment plant (WTP). Starting mid-May 2020, the City experienced a rapid change in water production leading to an emergency situation four weeks later that caused a citywide water curtailment. Newport is a small town with a population of 10,000, b...
Pilot Studies of Per- and Polyfluoroalkyl Substances (PFAS) Removal From Drinking Water with Membranes and Treatment of Membrane Concentrate
Per- and poly-fluoroalkyl substances (PFAS) are man-made fluorinated compounds of emerging concern in the water industry. PFAS are persistent and stable in the environment due to the strong chemical bond between carbon and fluorine atoms. The City of Greensboro (City) in North Carolina detected PFAS in their finished drinking water as a result of t...
Pilot Studies of Per- and Polyfluoroalkyl Substances (PFAS) Removal From Drinking Water with Membranes and Treatment of Membrane Concentrate
Per- and poly-fluoroalkyl substances (PFAS) are man-made fluorinated compounds of emerging concern in the water industry. PFAS are persistent and stable in the environment due to the strong chemical bond between carbon and fluorine atoms. The City of Greensboro (City) in North Carolina detected PFAS in their finished drinking water as a result of t...
A Plethora of Seawater Intakes Which Will Be Selected?
The Claude "Bud" Lewis Carlsbad Desalination Plant (CDP), pictured in Figure 1, has been operating for nearly 3 years, producing approximately 50= million gallons per day (MGD) to meet 10 percent of the City of San Diego’s daily potable water demands. The plant has been operating under a temporary State Water Quality Control Board (Water Board) p...
A Plethora of Seawater Intakes Which Will Be Selected?
The Claude "Bud" Lewis Carlsbad Desalination Plant (CDP), pictured in Figure 1, has been operating for nearly 3 years, producing approximately 50= million gallons per day (MGD) to meet 10 percent of the City of San Diego’s daily potable water demands. The plant has been operating under a temporary State Water Quality Control Board (Water Board) p...
Options for Expanding the Des Moines Saylorville Membrane Filtration Plant
This case study will describe the options considered for capacity expansion of Saylorville WTP in Des Moines, IA. The facility currently has submerged MF/UF filtration with a side stream RO system for softening. The alternatives analysis used a decision matrix which included capital and life cycle cost as well as non-economic factors to recommend l...
A Pilot Study to Evaluate PFAS Removal from Filtered Water
This presentation will review the removal of per- and polyfluoroalkyl substances (PFAS) from surface water using nanofiltration (NF). A 20-gpm NF pilot has been in operation since October 2021 to evaluate treatment performance and operational challenges. To date, we have evaluated PFAS removal at two recoveries: 80% and 85%. In the near future we w...