German firm develops new blending technology for biogas plants

ETW Energietechnik GmbH developed a new equipment that blends two gas streams of different

qualities to fuel combined heat and power plants (CHPs). This equipment 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.

This shrinking heating value can be compensated by gradually enriching biogas with natural gas. The

blending is completely automatized and designed to consume the lowest possible amounts of natural

gas. Almost any CHP can easily be upgraded.

There are several advantages for the operator. At startups the CHP receives the perfectly balanced fuel,

preventing startup problems caused by low CH4 concentration. That enables the operation of CHPs even

with CH4 concentration lower than 30%, increasing its lifetime and availability, thus its economic

feasibility. The CHP can be operated independently from the land-fill gas supply.

The company’s core business comprises the construction and maintenance of combined heat and power

(CHP) plants in the output range of 400 to 4,600 kWel. as well as highly efficient biogas upgrading plants

that produce pure biomethane out of raw biogas using a high-end PSA technology.

NGS INDIA