Impact of the pulsed voltage input and the electrode spacing on the enhancement of the permeate flux in a dielectrophoresis based anti-fouling system for a submerged membrane bioreactor

Larbi, Bouthaina; Hawari, Alaa H.; Du, Fei; Baune, Michael; Thöming, Jorg

doi:10.1016/j.seppur.2017.06.045

Cited by 15 publications

(1 citation statement)

References 17 publications

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“…Numerical and experimental analyses of Joule heating in DEP devices have shown the temperature effects on the conductivity of the medium, electrothermal flow, and DEP trapping forces 21–23 . Several DEP studies tried to minimize the Joule heating by using low-conductivity buffer solutions 9,24 , increased or decreased device geometric scale 25–27 , low voltage operation with three-dimensional structure 28 , and coating electrodes with insulation layer 29–31 . In addition, various methods have been applied to measure the heat generation within the DEP device.…”

Section: Introductionmentioning

confidence: 99%

Localized Dielectric Loss Heating in Dielectrophoresis Devices

Kwak

Hossen

Bashir

et al. 2019

Sci Rep

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Temperature increases during dielectrophoresis (DEP) can affect the response of biological entities, and ignoring the effect can result in misleading analysis. The heating mechanism of a DEP device is typically considered to be the result of Joule heating and is overlooked without an appropriate analysis. Our experiment and analysis indicate that the heating mechanism is due to the dielectric loss (Debye relaxation). A temperature increase between interdigitated electrodes (IDEs) has been measured with an integrated micro temperature sensor between IDEs to be as high as 70 °C at 1.5 MHz with a 30 Vpp applied voltage to our ultra-low thermal mass DEP device. Analytical and numerical analysis of the power dissipation due to the dielectric loss are in good agreement with the experiment data.

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