Highest recovery rates in P-recycling through sewage sludge mono-incineration

Phosphorus recovery

Phosphorus is an essential element for all living organisms and is needed above all as fertilizer for high-yield agriculture. The finite reserves of raw phosphate are limited to a few regions of the world, some of which are politically unstable, leading to major risks in terms of security of supply. Another problem is the increasing contamination of the world's rock phosphates by heavy metals such as cadmium and uranium.

The revision of the German Sewage Sludge Ordinance (AbfKlärV) makes the recovery of phosphorus from sewage sludge or sewage sludge ash mandatory. The obligation to recover phosphorus applies from January 2029 for wastewater treatment plants with a capacity of 100,000 population equivalents (p.e.) and from January 2032 for plants with a capacity of 50,000 p.e. or more.

The highest phosphorus recovery rates of more than 80 percent are achieved by sewage sludge mono-incineration with subsequent P-recycling from the resulting sewage sludge ash. The low-pollutant sewage sludge ash from the S2E Fluidizer represents a significant phosphorus carrier and is thus a valuable feedstock for phosphorus fertilizer production. 

sludge2energy GmbH supports you in developing a strategic utilisation concept for your sewage sludge ashes and phosphorus recovery.

Phosphorus is an important raw material and can be recovered
Phosphorus is an important raw material and can be recovered for valuable fertilizer production