In the journal 'world water' from November / December 2016 (volume 39 / issue 6) an article was published on the topic of resource conservation by means of ultrasound treatment of sewage sludge. The article entitled 'Ultrasound technology to achieve energy self-sufficiency' was written by Dipl.-Ing. Gunnar Klingspor and the founders of Ultrawaves Dr.-Ing. Klaus Nickel and Prof. (em.) Dr.-Ing. Uwe Neis.
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