2026-04-17T04:04:03Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/187242024-06-18T11:51:01Zcom_2072_452955com_2072_2054col_2072_453063

00925njm 22002777a 4500 dc Serra Putellas, Teresa author Barcelona, Aina author Soler del Monte, Marçal author Colomer, Jordi author 2018-04-15 Daphnia are filter feeder organisms that prey on small particles suspended in the water column. Since Daphnia individuals can feed on wastewater particles, they have been recently proposed as potential organisms for tertiary wastewater treatment. However, analysing the effects of hydrodynamics on Daphnia individuals has scarcely been studied. This study focuses then, on quantifying the filtration and swimming velocities of D. magna individuals under different hydrodynamic conditions. Both D. magna filtration and movement responded differently if the flow was laminar or if it was turbulent. In a laminar-dominated flow regime Daphnia filtration was enhanced up to 2.6 times that of a steady flow, but in the turbulent-dominated flow regime D. magna filtration was inhibited. In the laminar flow regime D. magna individuals moved freely in all directions, whereas in the turbulent flow regime they were driven by the streamlines of the flow. A model based on Daphnia-particle encountering revealed that the filtration efficiency in the laminar regime was driven by the length of the D. magna individuals and the shear rate imposed by the system This work was supported by the University of Girona funding MPCUdG2016 and by the INNOQUA project from the European Union'sHorizon 2020 research and innovation program (Ares(2016)1770486)) http://hdl.handle.net/10256/18724 Daphnia magna Aigües residuals -- Depuració -- Tractament biològic Sewage -- Purification -- Biological treatment Aigua -- Depuració -- Filtració Water -- Purification -- Filtration Daphnia magna filtration efficiency and mobility in laminar to turbulent flows