Berliner Stadtreinigungsbetriebe (BSR) is relying on technology from the Rhineland and is delighted to be 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 tot he 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 per cent can be converted into biomethane suitable for feed-in.
„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 per cent 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.
This places very high demands on a biomethane plant for gas processing. The methane concentration is between 35 and 60 percent, the nitrogen and oxygen concentration is up to 23 percent, and the operating range – i.e. the partial load capacity of the plant – is between 40 and 100 percent capacity.
In order to minimise 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 percent.
ETW Energietechnik GmbH has been developing and producing energy systems at its Moers site since 1997. Since its foundation, ETW has been a manufacturer of highly flexible gas-fired power plants.
In its core business, the company focuses on the construction and servicing of biomethane plants for upgrading biogas to natural gas using the ETW SmartCycle® PSA process in the performance range > 500 Nm³/h raw gas and upgrading to liquid CO2 using the ETW SmartCool® CO2 liquefaction system.
Other main products are combined heat and power plants (CHP) in the output range from 400 to 4,500 kilowatts, electric.
The company acts as a full-service provider. From the transfer of biogas to the feeding of electricity or gas into the grid and the provision of heat, ETW also takes care of the construction, commissioning and servicing of the plant technology.
ETW Energietechnik GmbH‘s customers include large energy suppliers, agricultural businesses, local authorities and industrial companies of all shapes and sizes, all of which attach great importance to environmentally friendly and economical energy generation.
A strategic focus is the realisation of economical and sustainable system concepts, which are individually planned and tailored to the respective requirements. A qualified service team ensures the operational safety and maximum availability of the systems.
The family-run, medium-sized company, which employs 160 people, is managed by Marco and Carsten Weiss.
