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RUMBLES - September 2015

feature the anaerobic digester biogas to a natural gas quality vehicle fuel. The project included a 5.7-mile pipeline that delivers the fuel to the existing CNG fueling site. The gas generated by the anaerobic digester is the primary source of the fuel, but if enough biogas isn’t produced to meet demand, the additional gas will come from the public utility gas delivery system. On April 16, 2015, part three of the implementation plan became a reality. Currently 460 gasoline gallon equivalents are produced on-site daily, and have resulted in greenhouse gas emission reductions of 88% or more as compared to gasoline or diesel fuel. In addition, every gallon equivalent of biogas converted to CNG offsets a gallon of diesel fuel being burned. This also eliminates the flaring off of the excess gas at the treatment plant, thereby reducing carbon emissions by almost three mil-lion pounds per year. Other benefits include the ability to pro-duce a gallon of gasoline equivalent for approximately $0.21 after environmental credits generated under the U.S. Envi-ronmental Protection Agency’s Renewable Fuel Standard, and long-term fixed costs of renewable CNG fuel versus market cost fluctuations associated with conventional gasoline and diesel fuel. The total project cost, including pipeline, is approximately $2.8 million with an anticipated payback time of less than nine years. Water • Wastewater • Alternative Water Systems Construction Management • Operations & Maintenance Special District Services • Municipal Services 143 Union Boulevard, Suite 600 Lakewood, CO 80228 303.985.3636 • w ww.KennedyJenks.com 18 | RUMBLES SEPTEMBER 2015 Although the CNG Biogas project took more than 10 years to become a reality, we believe it was worth the effort. Making lemonade out of lemons is no big deal; try making vehicle fuel out of sewage, now that’s something to brag about! Dan Tonello is the Wastewater Services Manager for the City of Grand Junction. He can be reached at dant@ci.grandjct.co.us or 970.256.4171. Vehicle Fuel, continued from page 16 In 2014 the City of Grand Junction, Colorado, added compressed natural gas conditioning and compression equipment to capture, collect, and purify biogas from the anaerobic digesters and convert it to vehicle fuel.


RUMBLES - September 2015
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