A Study on the Valorization of Rice Straw into Different Value-Added Products and Biofuels

Table 4

Physicochemical analysis of the collected rice straw.

Parameters	Rice straw	Egyptian organic fertilizer standard (8079/2017)
Electrical conductivity (dS/m)	1.14 ± 0.2	6–10
Total dissolve solids (mg/L)	729.6 ± 0.2	3840–6400
Organic C (%)	27.63 ± 0.5	Min 9
Organic matter (%)	47.52 ± 0.5	Min 16
Moisture content (%)	7.20 ± 0.6	Max 30
Total nitrogen (%)	1.82 ± 0.2	Min 0.5
P2O5 (%)	0.025 ± 0.01	Min 0.6
K2O (%)	0.004 ± 0.001	Min 0.4
N + P2O5 + K2O (%)	1.85 ± 0.07	Min 1.5
C/N	15.18 ± 0.2	18–22 : 1
pH	6.82 ± 0.05	6–8