Parameter Crude SOMR (%) Treated SOMR (%)
Dried matter 88.23 85.12
Organic matter 92.11 96.11
Fat matter 4.02 1.88
Total ashes 4.55 10.45
Total nitrogen matter 7.33 6.26
Crude cellulose 42.54 40.30
Hemicellulose 19.43 7.23
Lignin 21.53 0.45
Potassium 0.11 0.19
Sodium 0.20 10.16
Calcium 0.39 --
aConcentrations expressed in percentage of dry matter
Table 1: Chemical composition of the solid olive mill residue (SOMR) before and after pre-treatment with NaOHa.