energy & emissions strategic plan

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 Authoritykhardy@encinajpa.com