Oil-free screw compressor for biogas and biomethane. AERZEN screw compressor packages are characterised by a great variety of types and a lot of modification possibilities. Whether these compressors serve as part of the customer`s plant concept or they are applied as complete system solution, AERZEN always adapts to individual customer requirements. Forming the basis for this is the development competence of this world market leader, as AERZEN has constantly innovated, optimised and completed successfully its compressors since 1943.