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ETW Energietechnik supplies biomethane upgrading technology

With a newly built biogas pipeline,"Biogaspartner Bitburg" will bundle the raw biogas supplies of up to 48 biogas plants from the region.

9 July 2020
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The 45-kilometre-long pipeline will transport the renewable energy source to a central upgrading plant at the Bitburg commercial, service and leisure centre area “Flugplatz Bitburg” from May 2020. There it will be refined to biomethane, a natural gas equivalent renewable alternative and fed into the gas grid.

With this pipeline, the shareholders, SWT Stadtwerke Trier, the private waste management company Luzia Francois and Landwerke Eifel AöR, are creating the conditions for an important component of the green and decentralised energy transition. The core of the project is the biomethane upgrading plant of ETW Energietechnik from Moers - based on the established, efficient ETW SmartCycle® PSA technology.

The biogas plant network in the region has a total potential to produce around 10,000 cubic meters of raw biogas per hour. Since May 2020, an initial seven plants have been sending 1800 cubic meters per hour of biogas to the upgrading plant - which corresponds to an annual volume of around 64 million kilowatt hours. With this volume, a good third of the annual natural gas demand of the nearby district town of Bitburg (14,000 inhabitants) can be covered.

The processing plant comes from the CHP and biogas upgrading specialists ETW Energietechnik in Moers. It is based on the established ETW SmartCycle® PSA technology, which was developed by ETW's own design team. "In the module, up to about 1800 cubic meters of raw biogas are upgraded every hour by removing CO2 and other undesirable elements, converted into biomethane and finally fed into the natural gas grid of the Trier public utility company," explains Dr. Oliver Jende, responsible sales manager at ETW Energietechnik GmbH.

A particular advantage of the ETW SmartCycle® PSA compared to other biogas upgrading processes is the dynamic adaptation to fluctuating raw gas compositions. This is done automatically according to the desired purity of the product gas and the volume flow by adjusting the cycle speed.

The benefits of the ETW process for the users have now also spread around the world. ETW Energietechnik has received another order to deliver the first ETW SmartCycle plant to Canada. The setup will have a processing capacity of 1920 Nm3/h raw biogas and is the first biomethane project for ETW outside Europe.

In addition, ETW is developing projects to produce both biomethane and liquefied CO2 according to EIGA Food grade.. In this combination the plant will enable a 100% CH4 yield, i.e. zero CH4 emissions and even a negative CO2 footprint. Also Land-fill gas upgrading plants are being designed, that are able to extract high amounts of Nitrogen (N2) from land-fill gas with the ETW SmartCycle® PSA technology. ETW is thus gradually establishing itself as a supplier of industrial biomethane plants.

Not least for this reason, ETW Energietechnik is currently in the process of doubling its production capacity at its headquarters in Moers. Construction work on the new hall and office building is in full swing and should be completed by August. With these orders and capacity expansions, ETW Energietechnik GmbH can count itself among the companies in the energy sector that are even creating new jobs in these difficult times.

The advantages of the ETW SmartCycle® PSA gas upgrading process at a glance:

  • Lowest energy consumption of all biogas upgrading processes
  • Simple process control and high availability (reference plants with 99% availability)
  • Fully automatic startup and turndown - Function
  • Methane content in the product gas adjustable between 96 and 99%
  • Guardbed to protect the adsorber filling
  • Adsorbent service life of more than 15 years
  • No chemical and biological risks as the process is completely dry
  • No waste water and no waste.

June 10, 2020 - ETW Energietechnik

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