Intensification of cross-flow membrane filtration using dielectrophoresis with a novel electrode configuration

Du, Fei; Ciaciuch, P.; Bohlen, Steven R.; Wang, Yan; Baune, Michael; Thöming, Jorg

doi:10.1016/j.memsci.2013.08.016

Cited by 34 publications

(30 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…DEP chip has been implemented for point‐of‐care system for medical diagnostics and quantitative cell analysis . In addition, DEP has been explored in purification of water , fouling reduction in membrane filtration , flow control , electrical characterization of cells , to name a few.…”

Section: Introductionmentioning

confidence: 99%

Dielectrophoretic separation of micron and submicron particles: A review

Dash

Mohanty

2014

Electrophoresis

View full text Add to dashboard Cite

This paper provides an overview on separation of micron and submicron sized biological (cells, yeast, virus, bacteria, etc.) and nonbiological particles (latex, polystyrene, CNTs, metals, etc.) by dielectrophoresis (DEP), which finds wide applications in the field of medical and environmental science. Mathematical models to predict the electric field, flow profile, and concentration profiles of the particles under the influence of DEP force have also been covered in this review. In addition, advancements made primarily in the last decade, in the area of electrode design (shape and arrangement), new materials for electrode (carbon, silicon, polymers), and geometry of the microdevice, for efficient DEP separation of particles have been highlighted.

show abstract

Section: Introductionmentioning

confidence: 99%

Dielectrophoretic separation of micron and submicron particles: A review

Dash

Mohanty

2014

Electrophoresis

View full text Add to dashboard Cite

show abstract

“…In their study, Du et al, successfully increased the permeate flux by 50%. Then, they further enhanced the permeate flux by 68% [12]. The same research group [11] demonstrated later that a stronger electric field induces stronger DEP forces on the particles that alleviate fouling more effectively and result in a better permeate flux.…”

Section: Introductionmentioning

confidence: 92%

Assessment of the Effect of Dielectrophoresis (DEP) on the Viability of Activated Sludge Biomass

Larbi¹,

Ltaief²,

Hawari³

et al. 2017

IJESD

Self Cite

View full text Add to dashboard Cite

Abstract-Effective application of dielectrophoretic forces in membrane bioreactor (MBR) systems has the potential to suppress membrane fouling. Nevertheless, minimizing the impact of the electric field on biomass suspension is essential to maintain the efficiency of the wastewater treatment process. In this study, interdigitated cylindrical electrodes (IDE), placed inside the membrane module, were used to generate dielectrophoresis (DEP) in an MBR system. The viability of the biomass was determined at different voltages (5-150 V) after 1-hour exposure to a pulsed alternating current (AC) electric field. The results of the behavioral response of the microorganisms revealed that at low voltage applications, the bacteria exhibited good performance and no major impact was found on their viability/metabolism. Whereas at high voltage applications (beyond 100 V), the current intensity and medium temperature increased due to the joule heating effect and caused a significant decline in the bacterial activity and pollutant removal efficiency as a result of bacterial lysis.

show abstract

“…A potential disadvantage of this approach is that larger particles stay trapped in the device for longer times, which can be problematic when dealing with biological particles. For instance, a prolonged exposure of eukaryotic cells to electric fields can lead to significant damage , caused by an imposed potential to cells membrane , rising of Joule heating and other phenomena. Skin and muscle cells have been observed to be electroporated with 1200 V pulses with a duration of 20 ms .…”

Section: Introductionmentioning

confidence: 99%

Dielectrophoretic manipulation of particle mixtures employing asymmetric insulating posts

et al. 2015

View full text Add to dashboard Cite

A novel scheme for particle separation with insulator-based dielectrophoresis (iDEP) was developed. This technique offers the capability for an inverted order in particle elution, where larger particles leave the system before smaller particles. Asymmetrically shaped insulating posts, coupled with direct current (DC) biased low-frequency alternating current (AC) electric potentials, were used to successfully separate a mixture of 500 nm and 1 μm polystyrene particles (size difference of 0.5 μm in diameter). In this separation, the 1 μm particles were eluted first, demonstrating the discriminatory potential of this methodology. To extend this technique to biological samples, a mixture containing Saccharomyces cerevisiae cells (6.3 μm) and 2 μm polystyrene particles was also separated, with the cells being eluted first. The asymmetric posts featured a shorter sharp half and a longer blunt half; this produced an asymmetry in the forces exerted on the particles. The negative DC offset produced a net displacement of the smaller particles toward the upstream direction, while the post asymmetry produced a net displacement of the larger particles toward the downstream direction. This new iDEP approach provides a setup where larger particles are quickly concentrated at the outlet of the post array and can be released first when in a mixture with smaller particles. This new scheme offers an extra set of parameters (alternating current amplitude, DC offset, post asymmetry, and shape) that can be manipulated to obtain a desired separation. This asymmetric post iDEP technique has potential for separations where it is important to quickly elute and enrich larger and more fragile cells in biological samples.

show abstract

Intensification of cross-flow membrane filtration using dielectrophoresis with a novel electrode configuration

Cited by 34 publications

References 24 publications

Dielectrophoretic separation of micron and submicron particles: A review

Dielectrophoretic separation of micron and submicron particles: A review

Assessment of the Effect of Dielectrophoresis (DEP) on the Viability of Activated Sludge Biomass

Dielectrophoretic manipulation of particle mixtures employing asymmetric insulating posts

Contact Info

Product

Resources

About