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Removal of nutrients from WWTP effluent by an algae-mussel trophic cascade by Tom V. van der Meer; Charlie J.E. Davey; Piet F.M. Verdonschot; Michiel H.S. Kraak is a Environmental Science article available to read on EtoBox.

What is Removal of nutrients from WWTP effluent by an algae-mussel trophic cascade about?

New treatment steps are needed to better remove nutrients from WWTP effluents to prevent further eutrophication of the receiving waterbodies. Algae can be used to remove nutrients from effluent, but the subsequent removal of the algae biomass remains a challenge. Employing the high filtration capacity of dreissenid mussels may offer an efficient tool to remove effluent grown algae. The aim of the present study was therefore to evaluate if an algae-mussel trophic cascade allows an efficient removal of both nutrients and effluent-cultured algae. To this end, we inoculated WWTP effluent with the alga Tetradesmus obliquus in a batch system and monitored algal growth and nutrient concentrations for 11 days. Subsequently, we fed this algal-effluent solution to Dreissena bugensis for 3 days, after which we determined the amount of remaining algae and produced (pseudo)faeces. The algae-mussel set-up was able to remove 99% of P and 99% of N from the initial effluent, and the combination of algae settlement and mussel filtration resulted in a 94% removal of suspended algae after only 24 h. A total of 67% of the algae were consumed by the mussels after 3 days. Most filtered algae were deposit

Who reads Removal of nutrients from WWTP effluent by an algae-mussel trophic cascade?

Author

Tom V. van der Meer; Charlie J.E. Davey; Piet F.M. Verdonschot; Michiel H.S. Kraak

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)