Prevention of M-A-P-fouling using DLC in a sewage treatment plant

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This research deals with applications for coatings with amorphous carbon films, also called Diamond-Like Carbon (DLC) in the wastewater sector for the prevention of fouling with magnesium ammonium phosphate (M-A-P, MgNH4PO4, struvite). In a major sewage treatment plant a 300 mm long DN100 pipe was installed, which was coated inside with a-C:H:Si (hydrogenated amorphous carbon coating doped with silicon) coating of 5-10 µm thickness using a PACVD reactor at the Wels Campus of the University of Applied Science Upper Austria. The test trials (1 month, 5 months) showed heavy M-A-P fouling with uncoated test-tubes made of stainless steel of 1,5 mm and 15 mm. In contrast DLC-coated tubes had no contamination at all. Furthermore, there is an economic estimate about using DLC-type coatings inside pipe-stocks presented which showed the need for further scale-up and for the development of a suitable welding technology for DLC-coated pipe-stocks.
Original languageEnglish
Title of host publicationProceedings of the 16. Minisymposium Verfahrenstechnik & 7. Partikelforum
Subtitle of host publicationSeptember 21 – 22, 2020 hosted by Institute of Chemical, Environmental and Bioscience Engineering (ICEBE) TU Wien
Place of PublicationWien
PublisherVienna University of Technology
Number of pages4
ISBN (Electronic) 978-3-903337-01-5
ISBN (Print) 978-3-903337-01-5
Publication statusPublished - 20 Sept 2020
Event16th Minisymposium Verfahrenstechnik und 7th Partikelforum - Wien, Austria
Duration: 21 Sept 202022 Sept 2020


Conference16th Minisymposium Verfahrenstechnik und 7th Partikelforum


  • a-C:H:Si, sewage treatment, fouling, struvite, magnesium ammonium phosphate, M-A-P, piping


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