Energy & Emissions Strategic Plan EWA’s Roadmap to Energy Independence
Feb 09, 2016
Energy & Emissions Strategic Plan
EWA’s Roadmap to Energy Independence
ObjectivesDescribe EWASet the context for EWA’s planning processDiscuss the importance of Board leadershipPlanning Goals, Process, Results\Big Picture OutcomesQ&A?15 minutes
Encina Wastewater Authority Carlsbad, California Joint Powers Agency 350,000 Residents 125 Sq. Mile Service Area $350M Asset Value Encina Water Pollution Control
Facility Contract O & M Regional Source Control Regional Laboratory
Encina Water Pollution Control Facility
ContextHigh energy demandHigh energy costsUnfavorable tariff environmentFuture energy markets unstable beyond local
controlEarly investment & adoptionWASTEWATER
Legacy Cogeneration InvestmentInvestment
Engines
Generators Blowers Digester Heat
Phase III 5 3-350 kWh 2-350kWh 100%Phase IV 5 3-350 kWh 2-350 kWh 100%Phase V 4 4-750 kWh 5 – In Array 100%
Board Strategic PolicyMission
As an environmental leader, EWA provides sustainable and fiscally responsible wastewater services to the communities it serves while maximizing the use of alternative and renewable resources.
Key IssueAdditional resource recovery and investment
creates the opportunity for energy independence mitigate impacts arising from unstable energy markets.
Planning Goals1. Energy Efficiency Goal
Review existing energy consumption and evaluate alternative methods to reduce consumption
2. Energy Production Goal ID and evaluate technologies for increasing on-site
energy production fueled by alternative or renewable fuels
3. Emissions Permitting Goal Evaluate alternative emissions and permitting models in
the context of energy demand & production strategies4. Planning Goal
Recommend specific actions.
Planning ProcessCurrent and projected future baselineIdentify energy efficiency measures (EEM)Comprehensive technology scan & comparisonRank technologies using defined evaluative
criteriaDevelop an implementation plan
Planning ResultsEnergy Efficiency Goal: Review existing energy consumption and evaluate alternative methods to reduce consumption
Baseline annual electric demand 17,500,000 kWh
Secondary Treatment process = 43% of electric demand, Target: 9 EEMs, 2,000,000 kWh annual demand reduction Aeration Header Repair Turbo Blowers Process Operation Changes Variable Speed Fans & Pumps
Planning ResultsElectrical Energy Production Goal: ID and evaluate technologies for increasing on-site energy production fueled by alternative or renewable fuels.
Screened In IC Engines, Fuel Cells, PV Solar
Screened Out Wind Turbines, Microturbines, Water Flow Energy
Capture
Planning ResultsBio-Gas Energy Production Goal: ID and evaluate technologies for increasing on-site energy production fueled by alternative or renewable fuels.
Screened In Alternative Fuels, Cell Lysis, Digester Enhancements,
Bio-Gas Treatment
Screened Out Sludge Heating, Bio-Gas Storage
Planning ResultsWaste-Heat Energy Production Goal: ID and evaluate technologies for increasing on-site energy production fueled by alternative or renewable fuels.
Screened In Absorption & Adsorption Chiller, Organic Rankine Cycle
Screened Out Steam Turbines, Solids Pyrolysis
Planning ResultsEmissions Permitting Goal: Evaluate alternative emissions and permitting models in the context of energy demand & production strategies
Screened In Synthetic Minor
Screened Out Title V
Recommended Project SummaryElement Est. $ ROI in
YrsPriority
EEMs 2.3M 0.2-25 1/1Alternative Fuel 2.0M 2.5 3/2Gas Treatment & Exhaust Catalysts
3.0M 2.5 2/3
5th IC Engine 1.0M 2.8 4/4Renewable Fuel Chiller 1.4M 6.4 5/56th IC Engine 3.1M 24 6/6
Planning OutcomesAppropriate response to public’s growing
recognition of the water-energy nexusGood planning is a condition precedent to
investmentEnergy efficiency is nearly universally viewed as
the most appropriate 1st investmentSustained Board of Director’s commitment to
energy independence since 2008Value of thoughtful resource deployment and
branded communication
Questions?Kevin M. HardyGeneral ManagerEncina Wastewater [email protected]