Characterisation of Organomineral Fertilisers Derived from Nutrient-Enriched Biosolids Granules

Table 1

Chemical analyses conducted on OMF₁₅, OMF₁₀, and biosolids granules.

Fertiliser material	𝑛	OMF15	OMF10	Biosolids granules
Determination		Mean ± SD
Total N (%, w w^−1)	4	13.0±2.75	9.0±1.55	4.5±0.73
Total P2O5 (%, w w^−1)	4	3.8±0.23	4.3±0.52	5.5±0.97
Total K2O (%, w w^−1)	4	3.2±0.92	3.0±0.61	0.2±0.07
Total Cd (mg kg^−1 DS)	3	0.98±0.07	0.98±0.15	1.20±0.03
Total Cu (mg kg^−1 DS)	3	268.4±10.7	264.2±11.0	329.3±11.6
Total Zn (mg kg^−1 DS)	3	422.7±3.8	422.2±5.6	493.0±5.1
Soluble P (%, w w^−1)	3	<0.10 ± 0.02	<0.10 ± 0.02	0.20±0.05
N : P2O5 ratio	4	3.4±0.75	2.1±0.41	0.80±0.29

(The standard deviation (SD) is shown as ± the mean value; DS is dry solids).