A new technology to recover white phosphorus from ashes of sewage sludge and bone meal.
Carbon free
No waste
Strong business case

Spodofos at a glance


The core process comprises a thermite reaction of sewage sludge ash constituents with aluminium. 

The lowest quality aluminium scrap can be used. 

Aluminium acts as reducer and as energy carrier and therefore:

The process is flexible in feedstocks.

Phosphate reduction is near complete.

Three step and compact processing

  1. Limited preheating;

  2. Mixture conditioning; 

  3. Conversion and products collection.

The maximum volumetric throughput equals the throughput of ash. 


Total achievable P-recovery efficiency is unprecedented.


Business case

Spodofos in detail