The gas upgrading plant in Kockte (Germany) - Case Study
Location: Köckte (Germany)
Capacity: 350 Nm³/h biomethane
Self-consumption: 0,23 kWel/Nm³ crude gas
Features: First fully integrated biogas upgrading plant using membrane technology in a three-stage process.
Overview of the gas upgrading plant in Köckte
The EnviThan gas upgrading plant in the district Altmarkkreis Salzwedel in Saxony-Anhalt is the first fully integrated biogas upgrading plant of EnviTec Biogas AG to create biomethane using the membrane-based process and to be injected into the public natural gas grid.
The crude biogas generated in the upstream biogas plant with a methane content of approx. 53% is conveyed directly into the EnviThan upgrading system, where it is first compressed to 10 bar.
Then it is refined in a three-stage process using highly selective membranes to a bio-natural gas purity level of over 97% CH4. The membranes consist of several thousand hollow fibres bundled together in a stainless-steel tube. While the majority of the CO2 and the water vapour pass through the micropores of the membrane, the methane collects on the high-pressure side of the membrane. This principle requires the use of neither water, nor chemicals.
The biomethane created is injected seamlessly to the public gas grid. The marketing of the bio-natural gas is handled by EnviTec Energy, which realises sustainable heat concepts with decentral biomethane co-generation plants.
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