Dr. Arne Hj. Knap has a PhD in microbiology and is the mastermind behind Sterners ABR and MAT technology. Knap has worked actively with biogas technology since 2002 and has a background from the Oil- and Gas Industry.

Knap was the Managing Director of BioTek, which was acquired by Sterner in 2014. He now specialises in what he is most passioned about - developing Sterners technology for biogas and sludge treatment.