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Pyrophos: Further development of alkali pyrolysis for removal of heavy metals and production of a market-grade P-K fertilizer from sewage sludge

Title OriginalPyrophos: Weiterentwicklung der Alkalipyrolyse zur Abtrennung von Schwermetallen und Herstellung eines marktfähigen Phosphor-Kalidüngers aus Klärschlamm

For an alkali pyrolysis, the sewage sludge is pyrolysed after adding potassium. Thus, heavy metals are removed in the vapour phase. This results in a P-K fertilizer that can be fully absorbed by plants and that has a market-grade nutrient content. In this project, the process will be optimised and piloted on a larger scale. Further plans are the assessment of the agronomic efficiency, plant design, cost calculation and the draft of a sales concept.

Financing/ Donor
  • Kommission für Technologie und Innovation KTI
Project partners
  • Fachhochschule Nordwestschweiz, Hochschule für Life Sciences, Institut für Ecopreneurship
  • CTU Clean Technology Universe AG
  • Abwasserverband Altenrhein
  • Landor
FiBL project leader/ contact (people who are not linked are former FiBL employees)
FiBL project staff (people who are not linked are former FiBL employees)
Role of FiBL


Research area
FiBL project number P10085
Date modified 20.12.2019
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