NORTHERN NEVADA FEASIBILITY STUDY

NORTHERN NEVADA FEASIBILITY STUDY Researching Advanced Purified Water Treatment Technologies

AUGUST 2, 2017

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• Status update – UNR activity focus – WaterSMART grant

• Collaboration opportunities • Next steps • Nevada Water Innovation Campus

Today's Topics




• Determine if Nevada’s newly adopted Exceptional Quality Reclaimed Water (Category A+), which creates a regulatory pathway for indirect potable reuse, offers water management opportunities for the Truckee Meadows region. – 5 Year effort (2016-2021) – $6-8 million

Reclaimed Water Feasibility Study




• Groundwater augmentation, potable, recreational or environmental uses

• Storing and securing a drought proof water supply for the future

• Diversify the region’s water supply portfolio while reducing reliance on the Truckee River

• Governor’s Drought Forum recommended advanced reclaimed water treatment investigations

Exception Quality A+ Water Potential







• 130 million gallons per day • Provides 25% of regional water supply • Reduces dependence on imported water • Pioneer in creating “agency legitimacy” movement

Orange County Groundwater Replenishment System




Nevada Regulations

Demonstration Project

Pilot Testing Technologies

Funding

Community Outreach

Hydrogeologic Investigations

Regional Feasibility Phase Activities

Project Development

Regional Feasibility Study created from

recognized best practices




UNR Scope of Work • 3-1/2 year effort • $676,000 Contract • Krishna Pagilla, PhD

– Internationally Recognized Water Expert – Director – Nevada Water Innovation Campus

• 3 PhD candidates: – Laura Haak – Vijay Sundaram – Lydia Peri



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Advanced Water Treatment Technologies Demonstration Project Tasks

• Task 1: Project Rationale and Justification • Task 2: Treatment Technologies Evaluations • Task 3: Basis of Design • Task 4: Operating and Testing Plan




• Identify regional economic, environmental, and social benefits

• Assess status-quo management of water and recycled water resources

• Develop a statement of opportunity for recycled water • Using “North Valleys” as the study area

Task 1: Project Rationale and Justification for Potable Reuse Scope of Work




Triple Bottom Line Assessment: Value Tree




Task 1 Findings • Potable Reuse provides greatest benefits through environmental

criteria – Groundwater quality may improve

• Aquifer replenishment and decreased pumping from depleted wells – Water stress (indicator of water security) will decrease in the North Valleys

• Increased water resource size through aquifer replenishment

• Potable Reuse also benefits social criteria – Health risk assessment shows safety expected for removal of pathogens,

regulated, and unregulated contaminants – Water conservation goals are expected to improve with PR

• Larger pool of water resources available

• Potable Reuse is more expensive than status-quo management – Capital costs for treatment train upgrades and distribution system – Value is generated through creation of a new water resource




Task 1 Recommendations • Potable Reuse improves future water management

– Developing a new aquifer to increase local water resources – Adaptable management that can balance flood risk, drought supplies,

conjunctive use, and well depletion – Removes need to export reclaimed water

• Further study of Potable Reuse should fill in gaps and complete a site and technology specific health risk assessment – Literature shows wide variability in pathogen removal, DBP formation, and

unregulated contaminant concentrations to influent • Local control may also correlate to additional external and

internal benefits – Energy savings, air pollution, carbon footprint – Water quality improvements – Local employment




• Nevada Proposed IPR Regulations and Requirements • Identify potential advanced treatment options • Evaluate case studies • Select advanced treatment train(s) for demonstration project • Provide technological justification for treatment process

selection

Task 2: Treatment Technologies that can meet Nevada DEP Regulations/ Requirements Scope of Work




Nevada Reclaimed Water Regulations

Indirect Potable Reuse through Infiltration Basins




Nevada Reclaimed Water Regulations Indirect Potable Reuse through Aquifer Injection




Task 2 Recommendations: Treatment Trains Recommended for IPR Demonstration

Spreading Basin IPR Project Train (Category A Effluent + Vadose Zone

Treatment) Wastewater Secondary Treatment Granular Media Filtration with Pretreatment UV Disinfection Chlorination for Residual Maintenance (if needed) Spreading Basin Vadose Zone/Soil Aquifer Treatment (SAT)

Saturated Zone Travel Time

Injection Well IPR Project Train (Ozone-BAC AWTF)

Wastewater Secondary Treatment

Coagulation-Flocculation-Clarification Granular Media Filtration (CFC GMF)

Ozone-BAC (O3-BAC) UV Disinfection Effluent Polishing Chlorination for Residual Maintenance (if needed) Injection Saturated Zone Travel Time




Task 3: Basis of Design for the Demonstration Project Scope of Work

• Determine Flows and Loads • Develop Specific Treatment Requirements • Perform Design Calculations • Evaluate Treatment Equipment Options • Summarize Design Criteria • Develop Conceptual Process Flow Diagram • Prepare Basis of Design Report for Spreading Basin IPR and

Injection Well IPR Demonstration Project




Task 4: Development of a System Testing Plan Scope of Work

• Contaminant Monitoring Plan • Sampling Plan • Critical Control Points (CCP) • Instrumentation Plan • System Testing Plan




Bureau of Reclamation WaterSMART Grant

• $300,000 additional regional effort • $150,000 federal grant – 50% match by Washoe County

• Water Rights Development • Water Markets Evaluation • Regional Long-Term Climate Variability Analysis • Low Energy Treatment Technologies

Scope of Work




LIFT Scholarship Exchange Experience for Innovation & Technology Program

• Water Environment and Research Foundation scholarship • Utility personnel to visit other utilities • Lydia Peri selected • Hampton Roads Sanitation District (VA) • Advanced water treatment pilot (O3-BAC-UVAOP)




IWA Reuse 2017 – Long Beach, CA International Conference on Water Reclamation and Reuse

• Presentation of UNR tasks • Representation from UNR (faculty/students), Washoe

County and City of Reno • Team acknowledged for innovative

collaboration with NDEP as a model for regional project implementation

• Regional pilot project recognized




Next Steps • Preparing for demonstration projects

– Procuring treatment equipment – Developing system testing plan – Hydrogeologic investigations

• Collaboration with our Independent Advisory Team • Continue pilot testing treatment technologies • Regional team gaining expertise • Kick off Bureau of Reclamation grant work




Nevada Water Innovation Campus Kick off Reception August 24th




Thank you

Rick Warner, Senior Engineer • [email protected]

Dr. Krishna Pagilla, UNR • [email protected]



mailto:[email protected]

mailto:[email protected]

Documents

NORTHERN NEVADA FEASIBILITY STUDY