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Detoxification Assays of Tunisian Tannery Wastewater under Nonsterile Conditions Using the Filamentous Fungus Aspergillus niger
Joint Authors
Sayadi, Sami
Boujelben, Raouia
Ellouze, Mariem
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-06-03
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
The ability of Aspergillus niger strain to reduce organic and mineral pollution as well as the toxicity of two tannery wastewaters, the unhairing effluent (UE) and the final effluent (FE), taken from a local Tunisian tannery and under nonsterile conditions, was studied.
Raw effluents show alkaline pH ≥11; thus experiments were carried out at initial pH values and at pH adjusted to 6.
Characterization of effluents also revealed high salt levels (EC > 17 mS/cm) and high organic matter content (25 g/L for the UE and 7.2 g/L for the FE) but a low biodegradability since BOD5 did not exceed 2.5 and 1.25 g/L for the UE and the FE, respectively.
The results of the biological treatment showed that A.
niger was able not only to grow at high pH and salinity values, but also to reduce organic and mineral pollutant load.
After treatment, the COD reduction for the UE reached 90% and 70% at pH=6 and at initial pH (12.13), respectively.
For the FE, the decrease of COD values reached 75% at pH=6 and 64% at initial pH (11.64).
Monitoring of mineral pollution levels showed a reduction in chromium (Cr) concentrations reaching 70% for the FE.
This was reflected by an increase of the biomass of A.
niger from 9.25 g/L (control) to 9.84 g/L for the FE.
To confirm the efficiency of the biological treatment using A.
niger, phytotoxicity (tomato seeds) and microtoxicity (Escherichia coli and Bacillus subtilis) tests were carried out.
Results of this monitoring showed an important decrease in the toxicity levels for both effluents.
American Psychological Association (APA)
Boujelben, Raouia& Ellouze, Mariem& Sayadi, Sami. 2019. Detoxification Assays of Tunisian Tannery Wastewater under Nonsterile Conditions Using the Filamentous Fungus Aspergillus niger. BioMed Research International،Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1128239
Modern Language Association (MLA)
Boujelben, Raouia…[et al.]. Detoxification Assays of Tunisian Tannery Wastewater under Nonsterile Conditions Using the Filamentous Fungus Aspergillus niger. BioMed Research International No. 2019 (2019), pp.1-11.
https://search.emarefa.net/detail/BIM-1128239
American Medical Association (AMA)
Boujelben, Raouia& Ellouze, Mariem& Sayadi, Sami. Detoxification Assays of Tunisian Tannery Wastewater under Nonsterile Conditions Using the Filamentous Fungus Aspergillus niger. BioMed Research International. 2019. Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1128239
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1128239