At the feed-in location of Enercity AG in Ronnenberg, it has become necessary to convert the existing biogas processing plant to comply with the new requirements of the gas network operator due to the conversion of the natural gas network from low calorific gas (L-gas) to high calorific gas (H-gas) with a higher methane content. Within the scope of the planned conversion, an additional challenge with the existing plant had to be addressed: the excessively high methane content in the off-gas. In addition to meeting the new quality requirements for biomethane, the plant conversion was also intended to reduce methane slip to relieve the downstream plant for thermal exhaust gas aftertreatment and to accommodate almost all of the valuable biomethane in the gas network.
The processing plant, designed for the production of L-gas quality biomethane, was expanded to include a new, large Flash 2 tank with all the necessary control and regulation technology. In addition, a new detergent pump, including piping, was installed, which fundamentally changes the detergent cycle and enables higher circulation rates to clean the biogas more efficiently of carbon dioxide.
Our services included taking inventory, developing the new plant configuration, and completely rebuilding the biogas upgrading plant, including adapting the control and regulation technology to the new plant operation.
Treatment Technology:
Physical Washing
Plant Location:
Lower Saxony
Plant Capacity:
30 GWh/a
Project Duration:
June - November 2025