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<br />section3 <br /> <br /> <br />~l" <br /> <br />-... <br /> <br />-- <br /> <br />~........- <br /> <br />best practices & resources <br /> <br />Water and Wastewater Treatment <br /> <br />Best Practices <br /> <br />Portland Pioneers Waste-ta-Energy Generation <br />The City of Portland. Oregon installed the world's first city-sponsored anaerobic dIgester <br />gas (ADG) fuel cell In its wastewater treatment plant in May 1999. The Fuel Cell Power <br />Plant converts methane Into electricity. generating power in a virtually pollution free <br />operation. Added benefits arc manifold-methane and CrIteria air pollutants arc reduced. as <br />is the amount of electricIty purchased from utilities that operate fossil-fuel burning power <br />plants. and the fuel IS free because methane is produced during wastewater treatment. <br />Portland installed a 200 kilowatts hydrogen fuel cell to help utlltze Its waste methane and <br />reduce power plant air emissions. The result of this pilot installation is a net reduction of <br />694 tons of CO2 annually - 14.000 tons over the life of the fuel cell. Efficiency for <br />generating electricity using a fuel cell is higher than most regional power plams at about <br />36 percent and when the usable heat is recovered, the rated efficiency chmbs to 76 <br />percent. The fuel cell displaces the need for emergency generators or un-interruptible <br />power supply valued at $150,000, <br /> <br />San Diego's Waste-to-Energy <br />The energy savings incurred by the City of San Diego's Metropolitan Wastewater <br />Department help maintaIn lower sewer rates for Citizens wt"lite providing renewable electric <br />energy to the region. Eight" dIgesters" at the POInt Lorna Wastewater Treatment Plant use <br />heat and bacteria to break down the organic solids removed from the community's <br />wastewater. One of the by-products of this biological process is methane gas, which is <br />collected from the digesters and piped to the on-site Gas Utilization Faclhty, The methane <br />powers two continuously running generators that can each produce up to 2.25 megawatts <br />of electriCity. <br /> <br />o Resources <br /> <br />ENERGY STAR - Wastewater Focus <br />tlttn:fJV/INW cllcrCJv<;tarnovflnc1cx clrn?r~ oovcrnrnC/ll W.1~(ewn1f"r focus <br /> <br />The Integrated Waste Services Association (IWSA) was formed In 1991 to promote <br />Integrated solutions to municipal solid waste management problems including waste to <br />energy technologies <br />IlllnflWNWvvtc.om,lwCl5tc htlnl <br /> <br />PA Department of the Environment Drinking Water and Wastewater Operators InFormation <br />Center Ilttn:/fwwwdl'f),Sliltc 1).1 us/deo!dcQu(alc!walcronslrcdcs!(Jllhndr.xQood 111m <br /> <br />Online Energy Efficiency Calculators - Pennsylvania Department of the Environment <br />Drinking Water and Wastewater Operators <br />III (n' Ilwww drll. <;1 <-lIe nil llslr!rll/d"Olllilt('/WClI c((l[)<<,II~e<1{,51(ln/PAGLSILnr~rnYp(l(IC'iir !l(~rovr:<1 <br />!culi1tor<; hUll <br />