Process & contact
Member of DPP
https://terranova-energy.com/umweltschutz/
Contact:
Updated 7/3/22
Input materials
Raw or digested sludge after dewatering, from WWTPs operating biological and/or chemical P-removal.
Output products
Calcium phosphate salt according to EU 2019/1009:
P > 8% (P2O5 > 18.3%)
Ca: 2 – 6 %
P > 8% (P2O5 > 18.3%)
Ca: 2 – 6 %
N: 1-2 % -
K < 1 %
Mg < 0.5 %
Organic carbon 2%
Contaminants:
Contaminants:
Pb < 10 mg/kg
Cr-total <50 mg/kg
Cu < 20 mg/kg
Zn < 200 mg/kg
Process description
1) continuous hydrothermal hydrolysis carbonization process at 175°C, 20-25 bars.
2) Acid treatment of hydrolysed sludge to dissolve P.
3) Mechanical separation into low-P solid “coal” and P-rich liquid filtrate.
4) Phosphate precipitation from the liquid to produce a calcium phosphate salt.
Operating status
Full scale plant operating on dewatered sewage sludge in China (since 2016) input capacity 2 t/h
Demonstration plant at Ruhrverband/Duisburg Germany, input capacity 250 kg/h.