Energy & Emissions Strategic Plan
EWA’s Roadmap to Energy Independence
Objectives
 Describe EWA
 Set the context for EWA’s planning process
 Discuss the importance of Board leadership
 Planning Goals, Process, Results\
 Big Picture Outcomes
 Q&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
Context
 High energy demand
 High energy costs
 Unfavorable tariff environment
 Future energy markets unstable beyond local control
 Early investment & adoption
 WASTEWATER
Legacy Cogeneration Investment
Investment
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 Policy
 Mission
 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 Issue
 Additional resource recovery and investment
 creates the opportunity for energy independence
 mitigate impacts arising from unstable energy markets.
Planning Goals
1. 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 strategies
4. Planning Goal
 Recommend specific actions.
Planning Process
 Current and projected future baseline
 Identify energy efficiency measures (EEM)
 Comprehensive technology scan & comparison
 Rank technologies using defined evaluative criteria
 Develop an implementation plan
Planning Results
Energy 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 Results
Electrical 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 Results
Bio-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 Results
Waste-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 Results
Emissions 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 Summary
Element
Est. $
ROI in Yrs
Priority
EEMs
2.3M
0.2-25
1/1
Alternative Fuel
2.0M
2.5
3/2
Gas Treatment & Exhaust Catalysts
3.0M
2.5
2/3
5th IC Engine
1.0M
2.8
4/4
Renewable Fuel Chiller
1.4M
6.4
5/5
6th IC Engine
3.1M
24
6/6
Planning Outcomes
 Appropriate response to public’s growing recognition of
the water-energy nexus
 Good planning is a condition precedent to investment
 Energy efficiency is nearly universally viewed as the
most appropriate 1st investment
 Sustained Board of Director’s commitment to energy
independence since 2008
 Value of thoughtful resource deployment and branded
communication
Questions?
Kevin M. Hardy
General Manager
Encina Wastewater Authority
khardy@encinajpa.com