Parameter Concentration Allowable limit* Units
pH 4.6-5.1 6-9.5  
Biological oxygen demand 5,260 1,100 mg L-1
Chemical oxygen demand 25,800 600 mg L-1
Total suspended solids 12,760 Not defined mg L-1
Oil and grease 4,230 15 mg L-1
Total Phenols 1,540 Not defined mg L-1
Color 1,400 Not defined TCU
Turbidity 1,264 Not defined NTU
Conductivity 12.5 Not defined mS cm-1
*According to Law No. 44 for year 2000
Table 1: Characteristics of olive mill wastewater subjected to the electrocoagulation process unit.