Intergraded Applied Methodology for the Treatment of Heavy Polluted Waste Waters from Olive Oil Industries

Table 2

Composition of the olive mill wastewater.

Characteristics	OMW-DF	OMW-DL	OMW-DP
Total solids (TS), %	6.33 ± 1.81	6.09 ± 1.05	6.59 ± 0.98
Total volatile solids, % of TS	90.36 ± 3.31	91.93 ± 4.15	88.12 ± 3.69
Total organic carbon content, % of TS	62.71 ± 6.27	60.17 ± 5.99	64.30 ± 7.12
Total kjeldahl nitrogen, % of TS	1.28 ± 0.17	1.31 ± 0.20	1.25 ± 0.19
Total phosphorous as P2O5, % of TS	0.84 ± 0.17	0.92 ± 0.11	0.88 ± 0.11
Total phenolic compounds g L^−1	8.71 ± 0.51	9.02 ± 0.39	490 ± 0.28
pH	5.66 ± 0.3	5.52 ± 0.4	5.58 ± 0.3
EC mS cm^−1	2120 ± 57	1984 ± 33	1277 ± 12
Salinity mg L^−1 CaCO3	1058 ± 91	901 ± 28	645 ± 48
BOD5, g L^−1	17.3 ± 5.5	20.1 ± 9.7	13.7 ± 3.4
COD, g L^−1	70.1 ± 12.3	57.4 ± 6.3	45.9 ± 4.5
COD/BOD5 ratio	4.05 ± 0.91	3.01 ± 0.87	2.98 ± 0.92
Ash, % of TS	9.71 ± 3.21	8.99 ± 2.18	9.25 ± 3.05
C/N ratio	52.25 ± 5.24	45.93 ± 4.15	51.44 ± 6.02
C/P ratio	74.65 ± 3.81	65.40 ± 6.17	73.68 ± 4.15
Specific weight, gr cm^−3	1.048 ± 0.033	1.057 ± 0.029	1.022 ± 0.041
Fats and oils, mg L^−1	1.46 ± 0.20	1.45 ± 0.22	6307.5 ± 279
Germination index, %	18 ± 5	16 ± 7	11 ± 6
Humics, %	0.94 ± 0.12	1.04 ± 0.27	0.89 ± 0.21
E4/E6	1.34 ± 0.03	1.53 ± 0.05	1.44 ± 0.03
K mg L^−1	3.1 ± 0.45	2.87 ± 0.50	2.17 ± 0.21
Ca mg L^−1	271.4 ± 14.1	248.7 ± 16.9	210.6 ± 12.2
Mg mg L^−1	32.8 ± 5.3	28.2 ± 4.7	22.9 ± 6.1
Na mg L^−1	344.3 ± 15.1	322.6 ± 16.9	209.1 ± 17.2
Cl2 mg L^−1	401.4 ± 51.4	367.8 ± 41.9	212.3 ± 24.7

TS: total solids; EC: electronic conductivity; COD: chemical oxygen demand; BOD: biological oxygen demand.