Supercritical Water Oxidation (eawag)


  • Parnter Name
    Eawag: Swiss Federal Institute of Aquatic Science and Technology
  • Partner Type
    Technology Partner
  • Contact Info
    Dr. Juri Lienert (
  • Website
  • Regularly Scheduled Required Maintenance
    Occasional fertilizer harvest to empty solids output container.
  • Use Cases
    • Single-stall Toilet
  • Users per Day (Expected)
    Currently being designed to accommodate 10 users per day.
  • Users per Day (Maximum)
  • Type of Waste Treated
    Solids Processing
  • Core Processing Technology
    Wet Oxidation
  • Processing Overview
    Feces, toilet paper and some flushing water are fed into a small-scale, batch-processing supercritical water oxidation reactor developed by the University of Applied Sciences and Arts, Northwestern Switzerland (FHNW).
  • Energy Balance
    Solids reactor in early design and component testing, no data as yet.
  • Currently in Active Development
  • Commercialization Status
    In Development
  • Commercialization Activities
    Field testing of feces treatment module planned for 2019.
  • Intellectual Property Status
  • Nutrient Reuse
    Nutrient recovery: >70% nitrogen, >80% phosphorus, >70% potassium and others
  • Technology Development Milestones
  • Field Tests for Feces Module
    TRL: 3 (2019)
    Feces module currently TRL 3. Field tests planned in the beginning of 2019.
Patent Number Description Link
WO2017194267 Method for the oxidation of organic sludges in cyclic batch mode Link