Composted versus Raw Olive Mill Waste as Substrates for the Production of Medicinal Mushrooms: An Assessment of Selected Cultivation and Quality Parameters

Table 1

Properties of raw two-phase olive mill waste (TPOMW), of TPOMW (plus olives leaves) prior to composting, and of TPOMW after composting.

	Raw TPOMW	TPOMW prior to composting	TPOMW after composting
pH	5.1	5.92	8.15
EC^1 (mS cm^−1)	1.08	1.15	1.68
Total C (%)	53.64	51.07	42.47
Total N (%)	1.31	1.45	1.96
C : N	40.95	35.22	21.67
TOM^2 (%)	96.21	94.31	87.88
Ash (%)	3.47	4.12	4.76
P (g kg^−1)	1.01	1.08	1.23
K (g kg^−1)	15.4	16.3	21.34
Lignin (g kg^−1)	351	343	318
Hemicellulose (g kg^−1)	380	341	226
Cellulose (g kg^−1)	211	208	167
GI^3 (%)	20	24	88

¹EC: electrical conductivity.
²TOM: total organic matter.
³GI: germination index.