Tannery mixed liquors from an ecotoxicological and mycological point of view: Risks vs potential biodegradation application
Articolo
Data di Pubblicazione:
2018
Abstract:
Fungi are known to be present in the activated sludge ofwastewater treatment plants (WWTP). Their study should be
at the base of an overall vision of the plant effectiveness and of effluents sanitary impact. Moreover, it could be fundamental
for the implementation of successful bioaugmentation strategies aimed at the removal of recalcitrant or toxic
compounds. This is one of the first studies on the cultivable autochthonous mycoflora present in the mixed liquors
of twoWWTP treating either vegetable or chromiumtannery effluents. All samples showed a risk associated with potential
pathogens or toxigenic species and high ecotoxicity (Lepidium sativum and Raphidocelis subcapitata were the
most sensitive organisms). Diverse fungal populations developed, depending on the origin of the samples (63% of
the 102 identified taxa were sample-specific). The use of a fungistatic was determinant for the isolation and, thus,
for the identification of sample-specific species with a lower growth rate. The incubation temperature also affected
the mycoflora composition, even though at lower extent. A selective medium, consisting of agarised wastewater,
allowed isolating fungi with a biodegradation potential. Pseudallescheria boydii/Scedosporium apiospermum species
complex was ubiquitously dominant, indicating a possible role in the degradation of pollutants in both WWTP.
Other species, i.e. Trichoderma spp., Trematosphaeria grisea, Geotrichum candidum, Lichtheimia corymbifera, Acremonium
furcatum, Penicillium simplicissimum, Penicillium dangeardii, Fusarium solani, Scopulariopsis brevicaulis potentially could
be involved in the degradation of specific pollutants of vegetable or chromium tannery wastewaters. However, several
of these fungi are potential pathogens and their application, for an in situ treatment, must be carefully evaluated.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
Tannery wastewater, Activated sludge, Fungi, Autochthonous mycoflora, Ecotoxicity
Elenco autori:
Valeria, Tigini; Federico, Bevione; Valeria, Prigione; Anna, Poli; Lucrezia, Ranieri; Francesco, Spennati; Giulio, Munz; Giovanna Cristina Varese,
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