Table 2 Elemental composition of the raw materials.
From: Impact of bottom ash addition on Pleurotus ostreatus cultivation on coffee ground substrate
Element | Spent coffee grounds (SPC) | Straw | Bottom ash |
|---|---|---|---|
C [%] | 53 ± 0.30 | 45.01 ± 0.32 | 0.35 ± 0.30 |
H [%] | 6.74 ± 0.08 | 5.39 ± 0.09 | 0.02 ± 0.07 |
N [%] | 2.32 ± 0.06 | 0.65 ± 0.09 | 0.02 ± 0.20 |
S [%] | 0.17 ± 0.02 | 0.17 ± 0.03 | 5.74 ± 0.38 |
Cd [mg/kg] | 0.05 ± 0 | 0.05 ± 0 | 0.736 ± 0.02 |
Cr [mg/kg] | 2.29 ± 0.02 | 3.33 ± 0.03 | 68.89 ± 0.71 |
Cu [mg/kg] | 18.16 ± 0.51 | 6.17 ± 0.17 | 52.88 ± 1.48 |
Zn [mg/kg] | 10.78 ± 0.39 | 16.02 ± 0.59 | 123.3 ± 4.51 |
Ni [mg/kg] | 2.99 ± 0.39 | 6.05 ± 0.78 | 40.93 ± 5.29 |
Pb [mg/kg] | 3.85 ± 0.01 | 6.39 ± 0.02 | 81.26 ± 0.3 |
Fe [mg/kg] | 97 ± 8 | 251 ± 20 | 31,979 ± 2566 |
Si [mg/kg] | 201 ± 7 | 1174 ± 41 | 160,481 ± 5606 |
P [mg/kg] | 472 ± 3 | 643 ± 4 | 1005 ± 6 |
Mn [mg/kg] | 33 ± 1.5 | 39.3 ± 1.7 | 352 ± 15.7 |
Se [mg/kg] | 0.23 ± 0.01 | 0.12 ± 0.01 | 5 ± 0.28 |
Al [mg/kg] | 18.8 ± 1.3 | 4.9 ± 0.3 | 80,990 ± 566 |
Na [mg/kg] | 124 ± 5 | 77 ± 3 | 172 ± 7 |
K [mg/kg] | 420 ± 8 | 72 ± 1 | 164 ± 3 |
Ca [mg/kg] | 361 ± 11 | 648 ± 19 | 23,031 ± 691 |
Mg [mg/kg] | 142 ± 10 | 202 ± 14 | 626 ± 44 |
