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Energy Efficiency / Conservation Case Studies in Waste Water Treatment Facilities
Prepared for:
May 19 (Indianapolis, IN) and May 21 (Elkhart, IN)
Energy Saving Opportunities for Wastewater Treatment Facilities: Energy Efficiency and CHP Workshop
Agenda• Why Performance Contracting?• Typical Improvements• Financial Review• References
– City of Bloomington – Dillman Plant– City of Winchester– City of Brazil – under construction
Why Performance Contracting -Technical
• WWTF’s are the largest energy user in a municipality– Aeration, Lift stations, Lighting, HVAC
• Code related issues can qualify for improvement
• Infrastructures are aging
• Technical advancements keep developing
• Growth within the area
• Safety related issues
• Comprehensive approach to infrastructure improvements
• Owner participation is vital to the success of the project
Why Performance Contracting -Economical
• Procurement Strategy for the design, construction and financing of infrastructure improvements
• Why pay the “Utility” when you can pay yourself first?
• Payments do not start until savings are being generated
• Financing is not considered “Constitutional Debt”, will not encumber future borrowings
• Owner chooses the team
• Energy Savings Guaranteed for the length of the contract
• Reconciliation of guarantee for full term of financing
Financial Benefits
• Installment Purchase Agreement– Maximum 15 yrs for WWTP
• No Change Orders Unless Client Driven
• Guaranteed construction price
• Tax exempt rates – Money is very inexpensive (3.5%)
• Unlimited borrowing capacity
• Utilizes RFP and/or RFQ
• No constitutional debt
Typical Improvements
• Aeration upgrades
• SCADA
• Pumps, Motors, VSD’s, Lighting
• Auger/Muffin Monsters
• Homeland Security
• AMR, Automated Meter Reading
• Power Generation, Digester gas
• Pipe lining
• Any improvement can qualify as long as energy/operational costs are reduced
Case Studies
City of Brazil City of Winchester
City of Bloomington
We Are Here
City of Bloomington IndianaCity of Bloomington IndianaWaste Water Treatment PlantWaste Water Treatment Plant
The leadership of Bloomington was looking to upgrade their city’s waste water treatment facility and significantly improve capacity and energy efficiency. Also, the improvements needed to impact the local environment and provide benefits without any effects to community budgets
City of Bloomington
Solutions• New 600 horsepower blower
• Fine bubble diffuser retrofits tofour aeration basins
• One aerobic digester
• Structural modifications toaerobic digesters
• Lighting upgrades for security
• Electric to gas HVAC conversion
Adjusted Baseline vs. Current Year
$-
$10,000
$20,000
$30,000
$40,000
$50,000
$60,000
Oct-04 Nov-04 Dec-04 Jan-05 Feb-05 Mar-05 Apr-05 May-05 Jun-05 Jul-05 Aug-05 Sep-05
Adjusted BaselineYear 1 10/04-9/05
Savings
Annual Savings
City of Bloomington -Economics
Total Savings
• $154,297 Annual Guaranteed Energy Savings• $144,594 Annual Operational Savings• $2,988,910 Projected Total Savings Over 10
Years • Project Cost: $2,371,493
City of Winchester City of Winchester WWTP ImprovementsWWTP Improvements
The challenge was to modernize and enhance the wastewater treatment plant of the Indiana community of more than 5000 using a self-funding process that stretches existing budgets and requires no fee or tax increase to implement.
City of Winchester
Solutions• Install fine bubble diffusers
• Install new high efficiency blowers
• Install VFD drive unit
• Install dissolved oxygen probes
• Install new buried air line toaeration tanks
• Piping modifications for bettercontrol
City of Winchester - Economics
Total Savings
• $23,210 Annual Guaranteed Energy Savings• $77,475 Annual Operational Savings• $1,006,850 Projected Total Savings Over 10
Years • Project Cost: $795,000
City of BrazilCity of Brazil
The challenge was to improve the efficiency and modernize the waste water treatment plant serving the needs of this Central Indiana community. All the while doing this without requiring the need for city leaders to raise service fees or local taxes.
City of Brazil – under construction
Solutions• Install new 12“ ductile iron air supply
• Install new high efficiency blower at sludge storage tank
• Install new course bubblediffusers at sludge storage tank
• Develop and provide solution tocorrect overflow situation
• Install standby power generatorfor new pumps
City of Brazil - Economics
Total Savings
• $10,393 Annual Guaranteed Energy Savings• $121,000 Annual Operational Savings• $1,313,930 Projected Total Savings Over 10
Years • Project Cost: $1,021,894
Thank you
“Award Winning”Energy Services
Company
Questions
Greg WishartEnergy Systems Group317- [email protected]
Doug TischbeinEnergy Systems Group317- [email protected]
