ETW Energietechnik wins contract for biomethane plant from Berliner Stadtreinigung (BSR)
- Processing up to 700 Nm3/h landfill gas into biomethane
Berliner Stadtreinigungsbetriebe (BSR) is relying on technology from the Rhineland and is taking a decisive step towards environmental protection and climate neutrality with the biomethane plant from ETW Energietechnik GmbH in Moers. The full-service provider of biomethane plants and combined heat and power (CHP) plants has been awarded the contract for a plant that will process up to 700 Nm³/h of landfill gas into biomethane in the future.
The plant concept was developed and planned by BSR in close cooperation with the planning office Rytec GmbH. Rytec brings extensive expertise in biogas production, biological and thermal waste treatment, energy technology and waste and landfill technology to the project.
"With the ETW treatment process specially developed for landfill gas with a downstream nitrogen reduction unit (NRU), landfill gas with nitrogen contents of over 22% can be converted into biomethane suitable for feed-in. Following the consistently positive operating experience of our first reference plant in Taranto, Italy, which has been running successfully for over a year, this new contract confirms the market's confidence in our engineering expertise and plant technology," explains Alexander Szabo, Sales Manager at ETW Energietechnik.
Landfill gas is a special gas for processing. On the one hand, it has a very high concentration of trace pollutants (VOCs: volatile organic compounds) and siloxanes. On the other hand, the gas quality is not constant. This results in fluctuations in gas composition and gas volume. The longer a landfill site is in operation, the more methane is replaced by oxygen and nitrogen. In addition, the volume of gas is declining.
High demands on gas processing. This places very high demands on a biomethane plant for gas processing. The methane concentration is between 35% and 60%, the nitrogen and oxygen concentration is up to 23%, and the operating range – i.e. the partial load capacity of the plant – is between 40% and 100% capacity.
Additional CHP unit covers own electricity requirements. To minimize the external electricity requirements of the biomethane plant, ETW is also supplying a CHP unit for its own electricity supply, which is also operated with the off-gas from the processing plant. This increases the methane yield of the entire plant to over 95%.
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