City of Norman Energy Management EPA Region VI Pretreatment Workshop August 4, 2010

Energy Management Why? Energy costs Energy costs –Up to 55% of facility operating budget –Potential savings of 20 – 40%

Business Case for Green The best way to convince organizations to go green is by showing the value of eliminating environmentally wasteful practices. The more data (specific ROI) the better. Bottom line: Using less energy, water, raw materials, producing less garbage, and discharging fewer pollutants allows you to cut the costs required to run an organization. Green = More Competitive.

Energy Management Energy Management How? Energy Conservation Energy Efficiency Renewable Energy

Energy Management Energy Management Energy Conservation Policies  anti-idling  lights out  wise use of energy – not having equipment on when not in use

Energy Management Energy Management How? Energy efficiency Improved lighting Improved lighting Energy-efficient equipment and appliances – Energy-efficient equipment and appliances – Building improvements Building improvements Improve heating and cooling efficiency Improve heating and cooling efficiency Efficient transportation Efficient transportation Conserve water Conserve water Update building codes Update building codes Improve operations and maintenance Improve operations and maintenance

Energy Management Energy Management How? Renewable energy

Energy Management Energy Management Wastewater Treatment Plant Upgrade Received a $1,000,000 stimulus grant Received a $1,000,000 stimulus grant Two projects Two projects –Variable frequency drive upgrade –Replacement of sludge boiler/heaters Savings Savings –VFD- 2.6 M kWh and $100,000 annually –Sludge boiler/heater project - 5,900 mmBtu and $65,000 annually.

Energy Management Energy Management Water Reuse Reclaimed effluent used in processes – –Saves the City of Norman 7 million gallons of potable water per month – –Approximately 84 million gallons per year

Challenges to Green Justification to Board of Directors/Shareholders/Sr. Mgmt. Not part of Vision Lack of Time/Resources Don’t Know What to Do No Process for Employees to Follow “It’s not easy being green” Kermit the Frog

Lean & Green University of Oklahoma's Lean Institute University of Oklahoma's Lean Institute –Training for Wastewater Treatment Facility (WWTF) and Water Treatment Facility (WTF) WWTF- energy conservation through pump motor efficiency and efficient use of lighting WWTF- energy conservation through pump motor efficiency and efficient use of lighting WTF – energy conservation through process changes WTF – energy conservation through process changes

Energy Management Energy Management WWTF Pump Efficiency Audit results: Audit results: Total cost of installing nine capacitors: $13, Total cost of installing nine capacitors: $13, Annual energy savings: $9, Annual energy savings: $9, ROI: 17 months (1.4 years) ROI: 17 months (1.4 years)

Energy Management Efficient use of lighting Policy – turn off lightsPolicy – turn off lights Audit of facilityAudit of facility Measured the total wattage of lighting (bulbs and ballasts) used in each area of the facility Measured the total wattage of lighting (bulbs and ballasts) used in each area of the facility Estimated the average number of hours each area is currently illuminated daily Estimated the average number of hours each area is currently illuminated daily Estimated the number of hours the same space would be illuminated based only on actual use Estimated the number of hours the same space would be illuminated based only on actual use

Wastewater Treatment Plant Lighting Data Room Number of Bulbs Wattag e Total Bulb Wattage Estimated Ballast Wattage (25% of bulb rating) Number of Hours Currently Running Daily Fluorescent bulb hours per day KwH/day Dollars/day Dollars/day Number of Hours Running Daily with Sensors New fluorescent bulb hours per day KwH/Da y Dollars/D ay Dollars/D ay Number of Light Switches Current Dollars/Annual Current Dollars/Annual New Dollars/Annual New Dollars/Annual Main Building Hallway I $ 0.64 $ 0.64 $ $ $ 0.21 $ 0.21 $ $ Hallway II $ 0.54 $ 0.54 $ $ $ 0.18 $ 0.18 $ $ Operators Lab $ 0.57 $ 0.57 $ $ $ 0.57 $ 0.57 $ $ Lab $ 2.86 $ 2.86 $ 1, $ 1, $ 1.79 $ 1.79 $ $ Lab Office $ 0.10 $ 0.10 $ $ $ 0.10 $ 0.10 $ $ Meter Room $ 0.38 $ 0.38 $ $ $ 0.38 $ 0.38 $ $ Meter Room Office $ 0.19 $ 0.19 $ $ $ 0.07 $ 0.07 $ $ Motor Control Room $ 0.02 $ 0.02 $ 6.52 $ $ 0.02 $ 0.02 $ 6.52 $ Centrifuge Room $ 1.68 $ 1.68 $ $ $ 0.84 $ 0.84 $ $ Centrifuge Control Room $ 0.02 $ 0.02 $ 8.69 $ $ 0.02 $ 0.02 $ 8.69 $ Chemical Storage Room $ 0.70 $ 0.70 $ $ $ 0.07 $ 0.07 $ $ Wash Bay $ 2.10 $ 2.10 $ $ $ 0.21 $ 0.21 $ $ Garage $ 0.84 $ 0.84 $ $ $ 0.21 $ 0.21 $ $ Break Room $ 1.71 $ 1.71 $ $ $ 0.57 $ 0.57 $ $ Service Area $ 0.38 $ 0.38 $ $ $ 0.05 $ 0.05 $ $ Men's Room $ 1.00 $ 1.00 $ $ $ 0.17 $ 0.17 $ $ Women's Room $ 0.54 $ 0.54 $ $ $ 0.06 $ 0.06 $ $ Water Closet $ 0.01 $ 0.01 $ 2.17 $ $ 0.01 $ 0.01 $ 2.17 $ Steve's Office $ 0.36 $ 0.36 $ $ $ 0.21 $ 0.21 $ $ Ralph's Office $ 0.36 $ 0.36 $ $ $ 0.11 $ 0.11 $ $ Loretta (Entry Area) $ 0.43 $ 0.43 $ $ $ 0.29 $ 0.29 $ $ Operator Room $ 1.14 $ 1.14 $ $ $ 0.76 $ 0.76 $ $ Out Buildings Lift Station Electrical Room $ 0.20 $ 0.20 $ $ $ 0.03 $ 0.03 $ $ Lift Station Vault Room $ 0.22 $ 0.22 $ $ $ 0.04 $ 0.04 $ $ S. Plant Digester (upstairs) $ 0.93 $ 0.93 $ $ $ 0.15 $ 0.15 $ $ S. Plant Digester (downstairs) $ 1.01 $ 1.01 $ $ $ 0.04 $ 0.04 $ $ N. Plant Clarifier building $ 0.07 $ 0.07 $ $ $ 0.01 $ 0.01 $ 2.17 $ N. Plant Clarifier (external) $ 0.13 $ 0.13 $ $ $ 0.02 $ 0.02 $ 7.67 $ N. Plant Digester (upstairs) $ 0.50 $ 0.50 $ $ $ 0.04 $ 0.04 $ $ N. Plant Digester (downstairs) $ 1.01 $ 1.01 $ $ $ 0.04 $ 0.04 $ $ N. Plant pump building $ 0.07 $ 0.07 $ $ $ 0.01 $ 0.01 $ 2.17 $ N. Plant pump building (external) $ 0.13 $ 0.13 $ $ $ 0.01 $ 0.01 $ 3.83 $ Headworks $ 0.88 $ 0.88 $ $ $ 0.29 $ 0.29 $ $ Paint Building $ 0.01 $ 0.01 $ 2.30 $ $ 0.01 $ 0.01 $ 2.30 $ Old Shop (external) $ 0.38 $ 0.38 $ $ $ 0.03 $ 0.03 $ $ Old Shop (upstairs) $ 1.43 $ 1.43 $ $ $ 0.06 $ 0.06 $ $ Old Shop (downstairs) $ 1.43 $ 1.43 $ $ $ 0.06 $ 0.06 $ $ Blower Building (external) $ 1.68 $ 1.68 $ $ $ 0.14 $ 0.14 $ $ Blower Building I $ 1.43 $ 1.43 $ $ $ 0.14 $ 0.14 $ $ Blower Building II $ 0.48 $ 0.48 $ $ $ 0.05 $ 0.05 $ $ Secondary Pump $ 0.29 $ 0.29 $ $ $ - $ - Scum pumps $ 0.01 $ 0.01 $ 2.17 $ $ 0.01 $ 0.01 $ 2.17 $ Totals $ $ $ 10, $ 10, $ 8.07 $ 8.07 $ 2, $ 2,

Energy Management Efficient use of lighting Based on the auditBased on the audit Installing occupancy sensing light switches throughout the facility (58 total light switches) Installing occupancy sensing light switches throughout the facility (58 total light switches) Costs: $1160 Costs: $1160 Savings: Savings: $7,574 estimated reduction in energy costs annually $7,574 estimated reduction in energy costs annually $292 estimated reduction in light bulb costs annually$292 estimated reduction in light bulb costs annually Estimated Annual savings: $7,866Estimated Annual savings: $7,866 ROI: 2 months ROI: 2 months

Energy Management Cost Annual Savings Energy Savings Cost Annual Savings Energy Savings Capacitors $13,473$ 9,663138,043 KwH Capacitors $13,473$ 9,663138,043 KwH Switches $ 1,160$ 7,866108,200 KwH Switches $ 1,160$ 7,866108,200 KwH Total: $14,633$17,529246,243 KwH Total: $14,633$17,529246,243 KwH Total Project ROI: 10 months Total Project ROI: 10 months

Energy Management WTF -Well Production Overview Cost to produce water Cost to produce water Cost by $/Kgal (electric) Cost by $/Kgal (electric) Cost by gpd (gallons per day) Cost by gpd (gallons per day) Which wells to run Which wells to run What order do we run the wells in What order do we run the wells in $$ savings $$ savings

January 2009

January 2009 (could be)

2009 vs. Could have been

Water Cost Savings

Environmental Savings 2 trucks for lime – from Texas 1 trucks for alum – Arkansas 1 trucks for CO2 – from Okc 3.5 trucks for Cl2 – from Tulsa.5 trucks for ammonia – from Okc 112 – trucks for sludge removal

Recap of Well study Plus an additional 87, 345,187 gallons of water

EPA tools Lean Toolkit Lean Toolkitwww.epa.gov/lean/toolkit/ Ensuring a Sustainable Future: An Energy Management Guidebook for Wastewater and Water Utilities Ensuring a Sustainable Future: An Energy Management Guidebook for Wastewater and Water Utilities pdf