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Effect of storage time on the biodegradability of olive oil mill wastewater from the cold extraction of olive oil system

Zakia Gueboudji
Zakia Gueboudji
, 
Mohamed Bagues
Mohamed Bagues
, 
Kenza Kadi
Kenza Kadi
, 
Kamel Nagaz
Kamel Nagaz
 et 
Dalila Addad
Dalila Addad
   | 24 juil. 2021
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Article Category: Research Article - Enviromental Biotechnology
Publié en ligne: 24 juil. 2021
Pages: 142 - 154
DOI: https://doi.org/10.2478/ebtj-2021-0023
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© 2021 Zakia Gueboudji, Mohamed Bagues, Kenza Kadi, Kamel Nagaz, Dalila Addad, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Linear regression representing the pH and EC of the tested OMWs within time of the storage. Z, A, and M correspond to Zlitni, Abbani, and Mixture, respectively. t0, t1(1M), t2(2M), t3(6M), and t4(12M) correspond to different storage time.
Linear regression representing the pH and EC of the tested OMWs within time of the storage. Z, A, and M correspond to Zlitni, Abbani, and Mixture, respectively. t0, t1(1M), t2(2M), t3(6M), and t4(12M) correspond to different storage time.

Figure 2

Effect of interaction (G x T) on BOD5 of the tested OMWs and their homogenous groups. Z, A, and M correspond to Zlitni, Abbani, and Mixture, respectively. t0, t1(1M), t2(2M), t3(6M), and t4(12M) correspond to different storage time. Column values with different letters are significantly different at p<0.05, according to Duncan’s multiple range test.
Effect of interaction (G x T) on BOD5 of the tested OMWs and their homogenous groups. Z, A, and M correspond to Zlitni, Abbani, and Mixture, respectively. t0, t1(1M), t2(2M), t3(6M), and t4(12M) correspond to different storage time. Column values with different letters are significantly different at p<0.05, according to Duncan’s multiple range test.

Figure 3

Effect of interaction (G x T) on COD of the tested OMWs and their homogenous groups. Z, A, and M correspond to Zlitni, Abbani, and Mixture, respectively. t0, t1(1M), t2(2M), t3(6M), and t4(12M) correspond to different storage time. Column values with different letters are significantly different at p<0.05, according to Duncan’s multiple range test.
Effect of interaction (G x T) on COD of the tested OMWs and their homogenous groups. Z, A, and M correspond to Zlitni, Abbani, and Mixture, respectively. t0, t1(1M), t2(2M), t3(6M), and t4(12M) correspond to different storage time. Column values with different letters are significantly different at p<0.05, according to Duncan’s multiple range test.

Figure 4

Effect of interaction (G x T) on BI of the tested OMWs and their homogenous groups. Z, A, and M correspond to Zlitni, Abbani, and Mixture, respectively. t0, t1(1M), t2(2M), t3(6M), and t4(12M) correspond to different storage time. Column values with different letters are significantly different at p<0.05, according to Duncan’s multiple range test.
Effect of interaction (G x T) on BI of the tested OMWs and their homogenous groups. Z, A, and M correspond to Zlitni, Abbani, and Mixture, respectively. t0, t1(1M), t2(2M), t3(6M), and t4(12M) correspond to different storage time. Column values with different letters are significantly different at p<0.05, according to Duncan’s multiple range test.

Figure 5

Effect of interaction (G x T) on TOM of the tested OMWs and their homogenous groups. Z, A, and M correspond to Zlitni, Abbani, and Mixture, respectively. t0, t1(1M), t2(2M), t3(6M), and t4(12M) correspond to different storage time. Column values with different letters are significantly different at p<0.05, according to Duncan’s multiple range test.
Effect of interaction (G x T) on TOM of the tested OMWs and their homogenous groups. Z, A, and M correspond to Zlitni, Abbani, and Mixture, respectively. t0, t1(1M), t2(2M), t3(6M), and t4(12M) correspond to different storage time. Column values with different letters are significantly different at p<0.05, according to Duncan’s multiple range test.

Figure 6

Effect of interaction (G x T) on BOD5/COD of the tested OMWs and their homogenous groups. Z, A, and M correspond to Zlitni, Abbani, and Mixture, respectively. t0, t1(1M), t2(2M), t3(6M), and t4(12M) correspond to different storage time. Column values with different letters are significantly different at p<0.05, according to Duncan’s multiple range test.
Effect of interaction (G x T) on BOD5/COD of the tested OMWs and their homogenous groups. Z, A, and M correspond to Zlitni, Abbani, and Mixture, respectively. t0, t1(1M), t2(2M), t3(6M), and t4(12M) correspond to different storage time. Column values with different letters are significantly different at p<0.05, according to Duncan’s multiple range test.

Figure 7

Projection of the interaction (time, genotypes and parameters measured on the plane (1 x 2) of the principal component analysis (PCA). Z, A, and M correspond to Zlitni, Abbani, and Mixture, respectively. t0, t1(1M), t2(2M), t3(6M), and t4(12M) correspond to different storage time.
Projection of the interaction (time, genotypes and parameters measured on the plane (1 x 2) of the principal component analysis (PCA). Z, A, and M correspond to Zlitni, Abbani, and Mixture, respectively. t0, t1(1M), t2(2M), t3(6M), and t4(12M) correspond to different storage time.

The means of the measured parameters of the varieties Zlitni, Abani and their mixture during storage and homogenous groups

Genotype Time Lipids (%) TSS (%) Water (%) DM (g/1) MM (g/1) VM (g/1) OM (g/1) TOC (%) TKN (%) C/N
Zlitni to 1.97±0.02d 0.98±0.03cd 83.26±0.05k 167.33±0.57c 24.38±0.33abc 142.95±0.47b 84.53±1.53ab 49±0.89ab 1.96±0.06de 24.94±1.20def
tl(lM) 1.74±0.04f 0.93±0.01ef 84.24±0.06i 157.56±0.66e 23.48±0.81bc 134.08±1.33d 81.19±2.80abc 47.07±1.62abc 1.89±0.02e 24.82±0.98def
t2(2M) 1.6110.04g 0.90±0.01ef 85.53±0.04g 144.63±0.47g 22.23±0.83cd 122.39±0.99f 84.67±1.44a 49.08±0.83a 1.83±0.02ef 26.77±0.57cde
t3(6M) 1.2410.04i 0.8910.01fg 95.50±0.04d 44.96±0.41j 20.75±1.52def 24.21±1.81h 78.21±1.28C 45.34±0.74c 1.47±0.02gh 30.78±0.89c
t4(12M) 0.06±0.00k 0.65±0.00i 98.36±0.02a 24±3.90i 18.39±1.50fg 5.60±3.88j 81.26±2.50abc 47.11±1.44abc 1.38±0.49gh 36.55±10.87ab
Abani to 2.35±0.05a 1.14±0.03a 82.16±0.2n 178.33±2.08a 26.65±0.99a 151.67±2.25a 85.34±1.54a 49.47±0.89a 2.23±0.03bc 22.12±0.73ef
tl(lM) 2.07±0.05c 1.12±0.02a 83.08±0.05i 169.20±0.5c 25.72±1.40ab 143.47±1.85b 79.94±0.21abc 46.34±0.12abc 2.19±0.00cd 21.12±0.02ef
t2(2M) 1.87±0.02e 1.06±0.01b 84.22±0.04i 157.73±0.4e 25.0811.91ab 132.65±1.84d 80.91±0.92abc 46.90±0.53abc 2.17±0.02cd 21.55±0.46ef
t3(6M) 1.36±0.04h 0.98±0.00cd 94.85±0.05f 51.46±0.5h 19.18±1.76efg 32.28il.26g 80.81±1.76abc 46.84±1.02abc 1.62±0.02fg 28.93±1.09cd
t4(12M) 0.26±0.02j 0.77±0.02h 98.09±0.03b 29.10±0.3k 18.68±0.71efg 10.41±0.94i 81.04±0.49abc 46.98±0.28abc 1.26±0.01h 37.19±0.42a
Mixed to 2.15±0.05b 1.01±0.07bc 82.58±0.07m 174.16±0.7b 25.47±1.53ab 148.69±2.05a 85.62±0.33a 49.63±0.19a 2.55±0.04a 19.41±0.23f
tl(lM) 1.94±0.02d 1.03±0.01b 83.66±0.04j 163.33±0.4d 26.04±0.45a 137.29±0.62c 82.73±4.20abc 47.96±2.43abc 2.49±0.04a 19.23±0.90f
t2(2M) 1.74±0.04f 0.95±0.01de 84.91±0.03h 150.83±0.3f 24.88±0.99ab 125.95±0.87e 83.24±1.19abc 48.25±0.69abc 2.44±0.01ab 19.75±0.32f
t3(6M) 1.2710.03i 0.85±0.01f 95.20±0.02e 48±0.2i 20.96±2.22de 27.03±2.12h 78.53±9.77bc 45.52±5.66bc 1.99±0.02de 22.81±2.96ef
t4(12M) 0.10±0.01k 0.72±0.01i 97.91±0.02c 20.83±0.2m 16.9511.35g 3.8711.64j 82.07±1.20abc 47.57±0.69abc 1.50±0.01g 31.57±0.37bc
ANOVA Genotype (G) *** *** *** * ns ***
Time (T) *** *** *** *** *** *** ***
GxT *** *** *** ns ns ns * ns
Error 0.001 0.001 0.005 1.508 1.777 3.225 9.535 3.204 0.017 8.918

Results of variance analysis of the genotype effects, time and their interaction on some measured parameters

ANOVA pH EC COD BOD5 BI TOM BOD5/COD
Genotype (G) *** *** *** *** ns *** ns
Time (T) *** *** *** *** *** *** ***
G x T *** *** * ns ns * ns
Error 0.000 0.000 432.822 118.803 0.092 142.061 0.004
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