New Gas Blending Technology for Landfill Cogeneration Units

According to German-based ETW Energietechnik GmbH, the new solution improves the feasibility of land-fill gas and other combined heat and power units (CHP).

The company has developed a new equipment that blends two gas streams of different qualities to fuel CHPs. It “precisely blends the two gases to a homogeneous fuel mixture and is indicated for landfills that struggle with shrinking heating values and volumes of biogas along their lifetime,” the company emphasized. “This shrinking heating value can be compensated by gradually enriching biogas with natural gas (NG). The blending is completely automatized and designed to consume the lowest possible amounts of NG. Almost any CHP can easily be upgraded.” There are several advantages for the operator, ETW Energietechnik GmbH is convinced. At startups the CHP would receive the perfectly balanced fuel, preventing startup problems caused by low methane (CH4) concentration. “That enables the operation of CHPs even with CH4 concentration lower than 30 percent, increasing its lifetime and availability, thus its economic feasibility.” The CHP could be operated independently from the land-fill gas supply.

Photo: ETW