Impact of treated sewage on meiobenthic nematodes: a case study from the Tunisian Refining Industries Company

Impact of treated sewage on meiobenthic nematodes: a case study from the Tunisian Refining Industries Company

The main objective of the current study was to assess the impact of the water taken from the 'Tunisian Refining Industries Company' on meiobenthic nematodes, before and after a series of treatments in decantation basins followed by its discharge in Bizerte bay, Tunisia. The comparison of e...

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Bibliographic Details
Published in:Brazilian journal of biology Vol. 82; pp. e246116 - 8
Main Authors: Hedfi, A, Ben Ali, M, Noureldeen, A, Darwish, H, Saif, T, Albogami, B, Altowairqi, T K, Boufahja, F
Format: Journal Article
Language:English
Published: Brazil Instituto Internacional de Ecologia 2022
Subjects:
Animals
Bioindicators
BIOLOGY
Biomonitoring
Chemical oxygen demand
Cyartonema
Decantation
Discharge
Environmental Monitoring
Geologic Sediments
Humans
Hydrocarbons
Indicator species
Industry
meiobenthic nematodes
Metoncholaimus pristiurus
microcosms
Microlaimus honestus
Nematoda
Nematodes
Organic matter
Paramonohystera proteus
Pollutants
refinery
Sediments
Sewage
Sewage treatment
taxonomy
Treated sewage
Tunisia
Wastewater treatment
Water Pollutants, Chemical - analysis
Tunisia
refinery
nematoides meiobentônicos
refinaria
meiobenthic nematodes
microcosms
taxonomy
taxonomia
esgoto tratado
treated sewage
microcosmos
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Summary:The main objective of the current study was to assess the impact of the water taken from the 'Tunisian Refining Industries Company' on meiobenthic nematodes, before and after a series of treatments in decantation basins followed by its discharge in Bizerte bay, Tunisia. The comparison of environmental parameters of the two types of water was clearly indicative of an improvement in the quality of treated waters after a significant reduction in their loads in hydrocarbons. Overall, the water retained a good quality after being treated by 'Tunisian Refining Industries Company' before discharge in the sea. At the end of the experiment, differential responses were observed according to the richness of sediment in organic matter and hydrocarbons. Thus, it was apparent that the nematode assemblage exposed to the treated waters was closer to controls and associated to higher values of abundance, than that under untreated ones. It was also assumed that the species Microlaimus honestus De Man, 1922, Paramonohystera proteus Wieser, 1956 and Cyartonema germanicum Juario, 1972 are sensitive bioindicators of bad environmental statues and of hydrocarbon presence in the environment. On the other hand, Metoncholaimus pristiurus (Zur Strassen, 1894) Filipjev, 1918 would rather be classified as a positive bioindicative species of this type of pollutants.
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ISSN:1519-6984
1678-4375
1678-4375
DOI:10.1590/1519-6984.246116