In this regard, the wastewater pH value, which
influences the metal speciation, is kept constant in WWTPs and,
therefore, should not compromise the D. polymorpha purification
activity. Finally, with regard to the test with 100% inlet, there has
been a serious decline in the bivalves’ performance related to a
high mortality of the animals (data not shown). This result further
confirms how an excessive suspended particulate matter amount
and the possible presence of toxic substances into the WWTP can
decrease the bivalves
filtering capacity and even compromise their
health status. However, this aspect does not limit the possible
engineering of this method, since it would be sufficient to control
the particulate matter of the wastewater, as suggested by Binelli
et al.
In this regard, the wastewater pH value, whichinfluences the metal speciation, is kept constant in WWTPs and,therefore, should not compromise the D. polymorpha purificationactivity. Finally, with regard to the test with 100% inlet, there hasbeen a serious decline in the bivalves’ performance related to ahigh mortality of the animals (data not shown). This result furtherconfirms how an excessive suspended particulate matter amountand the possible presence of toxic substances into the WWTP candecrease the bivalvesfiltering capacity and even compromise theirhealth status. However, this aspect does not limit the possibleengineering of this method, since it would be sufficient to controlthe particulate matter of the wastewater, as suggested by Binelliet al.
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