Carbon dioxide is removed through amine washing. During this process, the carbon dioxide bonds with the amine in an absorber, after which it is separated once again in a stripper. The amine is regenerated as a result, becoming available once again for the start of a new process.

An advantage of this process is that only the end product (biomethane) is compressed, not the surplus carbon dioxide. The units offered have virtually no methane loss and low electrical consumption. ...

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