The Rockingham County Solid Waste Management Division in North Carolina has selected 2G Energy Inc. to manufacture, supply, and install an 800 ekW/h LFG to Energy Conversion System for their Landfill Gas to Energy Project. Previously, the Rockingham County Landfill had been flaring off the available methane gas. With the 2G CHP plant, the LFG gas will be used for the generation of electricity and thermal energy.

The 2G Energy Inc. supply includes a fully containerized 2G avus 800 with a fully integrated MWM gas engine having an electrical power rating of 800 ekW/h or 6,640 MW p.a. and a thermal power capacity of 921 kWh/th. Additionally, 2G Energy Inc. has supplied a gas treatment system with a cooler/dryer/dehumidification, and re-heating system, as well as Siloxane filtration technology.

Raw LFG at the well outlet typically contains a very high water vapor content (between 30 to 100g water per m³ gas, equivalent to 1.06 to 3.53 ounces per 35 ft³), depending on the ambient temperature. This translates to approximately 270,000 liters (72,000 gallons) of water per year, roughly equal to two standard-size swimming pools. During winter, at lower temperatures, the water vapor can easily condense inside the gas pipeline leading to the CHP. This condensate, in combination with Siloxane and/or H2S, can cause accelerated corrosion.

Furthermore, condensate in the intake section automatically reduces engine efficiency and significantly reduces the effectiveness of gas filter systems. The 2G gas treatment system is designed to eliminate these problems. This 2G CHP module and all its components are housed in a 40' fully sound-attenuated container, which reduces the noise down to <65 dbA in standard configuration.

After the plant owner has used portions of the generated electricity to serve the entire landfill and all its adjacent facilities, the remaining surplus power is exported and sold to the utility grid.