Detoxification Assays of Tunisian Tannery Wastewater under Nonsterile Conditions Using the Filamentous Fungus Aspergillus niger

Table 1

Characterization of tannery effluents compared to Tunisian standards for discharges in public canalizations. Values given represent the mean of three replicates.

Parameters (Unit)	Unhairing	Final	NT 106.002
	(UE)	(FE)
pH	12.13 ± 0.34	11.64 ± 0.53	6.5 – 9
EC (mS/cm)	17.41 ± 0.41	18.2 ± 0.51	—
Salt (g/L)	14.8 ± 0.35	15.47 ± 0.43	—
COD(g/L)	25 ± 2.46	7.2 ± 1.09	1
BOD5 (g/L)	2.5 ± 0.68	1.25 ± 0.38	0.4
BOD5/COD	0.1 ± 0.02	0.17 ± 0.02	—
TS (g/L)	35.1 ± 1.95	20 ± 1.34	—
TV (g/L)	18.9 ± 1.59	4.9 ± 0.7	—
TSS (g/L)	10.9 ± 0.98	3.37 ± 0.83	0.4
VSS (g/L)	6.1 ± 1.40	2.2 ± 0.64	—
TKN (mg/L)	2632 ± 29.1	448 ±15.34	100
- N (mg/L)	572.6 ±19.53	259 ±26.67	100
H2S (mg/L)	1020 ±21.45	720 ±24.34	—
Soluble protein (g/L)	8.35 ± 0.72	0.059 ± 0.03	—
Fat (%)	6.62 ± 1.16	1.55 ± 0.34	—
K (mg/L)	8 ± 0.49	194 ±2.33	50
Cr (mg/L)	<< 0.1	7.02 ± 0.76	0.1
Cd (mg/L)	0.018 ± 0.01	0.048 ± 0.01	0.1
Fe (mg/L)	1.046 ± 0.45	1.618 ± 0.23	0.05

Number of samples for each parameter “n” = 3