Energy Efficiency / Conservation Case Studies in Waste Water Treatment Facilities Prepared for: Energy Saving Opportunities for Wastewater Treatment Facilities: Energy Efficiency and CHP Workshop May 19 (Indianapolis, IN) and May 21 (Elkhart, IN)
Why Performance Contracting? Typical Improvements Financial Review References City of Bloomington Dillman Plant City of Winchester City of Brazil under construction Agenda
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 We Are Here City of Brazil City of Winchester City of Bloomington
City of Bloomington Indiana Waste 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 to four aeration basins One aerobic digester Structural modifications to aerobic digesters Lighting upgrades for security Electric to gas HVAC conversion
Annual Savings Adjusted Baseline vs. Current Year $60,000 Savings $50,000 $40,000 $30,000 $20,000 $10,000 $- 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 Baseline Year 1 10/04-9/05
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 WWTP Improvements The challenge was to modernize and enhance the wastewater treatment plant of the Indiana community of more than 5000 using a selffunding 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 to aeration tanks Piping modifications for better control
Total Savings City of Winchester - Economics $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 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.
Solutions City of Brazil under construction Install new 12 ductile iron air supply Install new high efficiency blower at sludge storage tank Install new course bubble diffusers at sludge storage tank Develop and provide solution to correct overflow situation Install standby power generator for 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
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Questions Greg Wishart Energy Systems Group 317-502-4663 gwishart@energysystemsgroup.com Doug Tischbein Energy Systems Group 317-879-2005 dtischbein@energysystemsgroup.com