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Landfill CEM Ambiente SpA After 24 years, the debris-laden landfill in Cavenago di Brianza, Italy – about 30 miles from Milan – closed in 1994 and was transformed into a lush, picturesque natural area that today is home to grazing animals, abundant wildlife, magnificent meadows, and tranquil fields. Far underground, however, sits decomposing garbage that continues to produce methane biogas, a waste product of the aging landfill site. Instead of flaring the methane gas into the atmosphere like a majority of landfills worldwide, CEM Ambiente SpA, a solid-waste management company that serves 450,000 residents in the region, decided in 1994 to use a portion of the methane gas to fuel a reciprocating engine at its nearby headquarters. The company’s goal: use the two megawatts of electricity produced by the engine to help power CEM Ambiente’s headquarters. But in 2010, problems arose when the methane content of the biogas dropped to 30 percent, which is common among aging landfills. The 30 percent methane content was too low for the antiquated reciprocating engine to use as fuel. CEM Ambiente officials began searching for a more reliable, efficient, and environmentally friendly power source. That year they found the answer with five highly efficient, quiet, and low-emission Capstone C65 Microturbines installed in a combined heat and power (CHP) application. At a glance Location Cavenago di Brianza, Italy Commissioned March 2010 Fuel Methane gas Technologies • Five C65 Capstone MicroTurbines®. • Five Heat Recovery Modules. • Two Adicomp Gas Compressors. Results • Overall efficiency of the CHP system exceeds 80%. • Produces 325kW of electricity (7,800kW hours) each day. • Reduces C02 emissions by 3,900 metric tons (8.6 million pounds) annually. • Microturbines easily operate using biogas with methane content of 30% or less. Former reciprocating engine unable to run at this methane content level. • First landfill in Italy to showcase Capstone microturbines.PDF Image | Land ll CEM Ambiente SpA
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