ETW Energietechnik from Moers develops the CH4 and CO2 full value solution

ETW‘s biomethane plants upgrade biogas to natural gas quality by separating CH4
from CO2. The CH4 can be injected into the natural gas grid and made available in
the fuel market. Since the upgrading technology developed by ETW also generates
CO2 with a very high degree of purity, it was a logical step to develop a technology that
transforms an otherwise rejected emission into a value-added product.
The result is a high-quality biomethane as a direct substitute for fossil natural gas as
well as a liquid bio-CO2 in a food grade quality standard. In combination, ETW‘s plant
can thus be operated emission-free and with full CH4 recover. The result is a major
contribution to the reduction of greenhouse gas emissions accounted to the fuel and
energy sector.
Important advantages at a glance:
• High CH4 product purity up to 99% CH4
• High CO2 product purity according to EIGA standard up to 99.9% CO2
• The lowest energy consumption on the market
• Highest yield and GHG quota generation
• Operator friendly, very low maintenance
• Very high proven plant availability of >99%.

• Fully integrated CH4 and LCO2 system without unnecessary interfaces for the opera-
tor.

For biogas plant operators, the solution creates the access to new markets with the
competitive advantage of a negative carbon foot print. While substrate logistics and
biogas production chain can only be adapted to moderate fluctuations, the consumer
markets demand very fast reactions: With ETW Energietechnik‘s products, both sides
of the value chain can be decoupled and optimised.
For example, by combining the ETW CHP, ETW SmartCycle® biomethane plant and
the ETW SmartCool® LCO2 plants, operators can make short-term decisions and profit
from fluctuating electricity, natural gas and CO2 price fluctuations. At the same time,
the substrate and digestate logistics can be planned according to the best agronomical

practice and aiming a stable fermentation process. That results is the improved effici-
ency on the input side.

ETW Energietechnik GmbH has been developing and producing energy systems in
Moers-Germany since 1997. In its core business, the company concentrates on the

construction and servicing of combined heat and power plants (CHP) in the power ran-
ge from 400 to 4,500 kilowatts, electric, as well as biomethane plants for the upgrading

of biogas with the pressure swing adsorption process (PSA) and CO2 liquefaction
plants.
The company is a full-service provider, from design, manufacturing, commissioning and
full service support.
ETW Energietechnik‘s customers are composed of large energy suppliers, agricultural
businesses, municipalities and industries of various branches and scales that aim for a
better energy efficiency, reduced GHG foot prints and sustainable development.

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