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

Zakia Gueboudji; Mohamed Bagues; Kenza Kadi; Kamel Nagaz; Dalila Addad

doi:10.2478/ebtj-2021-0023

Figures & Tables

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.

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 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 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 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 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.

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

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

Figures & Tables

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

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

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