The materials that are being used to produce granular fertilizers are: solid fraction of digestate, liquid ammonium sulphate from ammonia stripping process (a product of nitrogen recovery from digestate), struvite (a product of phosphorus recovery from digestate), mineral fertilizers and other organic wastes.

The fertilizer products that have been developed and produced until now are:

% of N-P2O5-K2O % of Organic Matter
11-15-11 30
8-13-8 43
10-12-1 60
9-2-2 90
13-13-0 31
12-8-0 30

And the development of new products still continues.