High-frequency flow reversal for continuous microfiltration of milk with microsieves

Tatjana Verwijst, Jacob Baggerman, Franz Liebermann, C.J.M. van Rijn

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)

Abstract

A new filtration method using rotating micro-engineered membranes (microsieves) is described. The method uses constant rotation of the microsieve in combination with high-frequency flow reversal to achieve stable and high fluxes. The high-frequency flow reversal is enabled by a vacuum device placed at the retentate side creating a local negative pressure to purge the microsieve from accumulating particles. The method was validated for milk filtration using microsieves with 0.9μm circular pores with a trans-membrane pressure (TMP) of 0.05-0.30bar and flow-reversal frequencies between 5 and 25Hz. Stable filtration (for at least 4h) was achieved with permeate fluxes for skimmed milk from 8 to 50m3h-1m-2 at room temperature, and for whole milk from 7 to 13 m3h-1m-2 at 50°C. The effect of the TMP, rotation frequency and flow-reversal strength on the flux was investigated. The flux increased proportional with the TMP up to a critical TMP of about 250mbar. Also the flux increased with rotation frequency up to an optimal frequency of 20Hz. The flow-reversal unit requires a threshold backward flow to create enough negative pressure to overcome the TMP during the removal cycle of the retentate particles. Above this threshold the flux increases strongly with increasing backward flow. The novel high-frequency flow-reversal method enables continuous milk filtration of large volumes during many hours without the need of a chemical cleaning cycle.

LanguageEnglish
Pages121-129
JournalJournal of Membrane Science
Volume494
DOIs
Publication statusPublished - 2015

Fingerprint

Microfiltration
milk
Milk
Pressure
Fluxes
Membranes
membranes
Chemical cleaning
chemical cleaning
cycles
thresholds
Vacuum
Equipment and Supplies
Temperature
porosity
vacuum
room temperature

Keywords

  • Back pulsing
  • Flow reversal
  • Fouling control
  • Milk microfiltration
  • Rotating membrane

Cite this

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title = "High-frequency flow reversal for continuous microfiltration of milk with microsieves",
abstract = "A new filtration method using rotating micro-engineered membranes (microsieves) is described. The method uses constant rotation of the microsieve in combination with high-frequency flow reversal to achieve stable and high fluxes. The high-frequency flow reversal is enabled by a vacuum device placed at the retentate side creating a local negative pressure to purge the microsieve from accumulating particles. The method was validated for milk filtration using microsieves with 0.9μm circular pores with a trans-membrane pressure (TMP) of 0.05-0.30bar and flow-reversal frequencies between 5 and 25Hz. Stable filtration (for at least 4h) was achieved with permeate fluxes for skimmed milk from 8 to 50m3h-1m-2 at room temperature, and for whole milk from 7 to 13 m3h-1m-2 at 50°C. The effect of the TMP, rotation frequency and flow-reversal strength on the flux was investigated. The flux increased proportional with the TMP up to a critical TMP of about 250mbar. Also the flux increased with rotation frequency up to an optimal frequency of 20Hz. The flow-reversal unit requires a threshold backward flow to create enough negative pressure to overcome the TMP during the removal cycle of the retentate particles. Above this threshold the flux increases strongly with increasing backward flow. The novel high-frequency flow-reversal method enables continuous milk filtration of large volumes during many hours without the need of a chemical cleaning cycle.",
keywords = "Back pulsing, Flow reversal, Fouling control, Milk microfiltration, Rotating membrane",
author = "Tatjana Verwijst and Jacob Baggerman and Franz Liebermann and {van Rijn}, C.J.M.",
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High-frequency flow reversal for continuous microfiltration of milk with microsieves. / Verwijst, Tatjana; Baggerman, Jacob; Liebermann, Franz; van Rijn, C.J.M.

In: Journal of Membrane Science, Vol. 494, 2015, p. 121-129.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - High-frequency flow reversal for continuous microfiltration of milk with microsieves

AU - Verwijst, Tatjana

AU - Baggerman, Jacob

AU - Liebermann, Franz

AU - van Rijn, C.J.M.

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Y1 - 2015

N2 - A new filtration method using rotating micro-engineered membranes (microsieves) is described. The method uses constant rotation of the microsieve in combination with high-frequency flow reversal to achieve stable and high fluxes. The high-frequency flow reversal is enabled by a vacuum device placed at the retentate side creating a local negative pressure to purge the microsieve from accumulating particles. The method was validated for milk filtration using microsieves with 0.9μm circular pores with a trans-membrane pressure (TMP) of 0.05-0.30bar and flow-reversal frequencies between 5 and 25Hz. Stable filtration (for at least 4h) was achieved with permeate fluxes for skimmed milk from 8 to 50m3h-1m-2 at room temperature, and for whole milk from 7 to 13 m3h-1m-2 at 50°C. The effect of the TMP, rotation frequency and flow-reversal strength on the flux was investigated. The flux increased proportional with the TMP up to a critical TMP of about 250mbar. Also the flux increased with rotation frequency up to an optimal frequency of 20Hz. The flow-reversal unit requires a threshold backward flow to create enough negative pressure to overcome the TMP during the removal cycle of the retentate particles. Above this threshold the flux increases strongly with increasing backward flow. The novel high-frequency flow-reversal method enables continuous milk filtration of large volumes during many hours without the need of a chemical cleaning cycle.

AB - A new filtration method using rotating micro-engineered membranes (microsieves) is described. The method uses constant rotation of the microsieve in combination with high-frequency flow reversal to achieve stable and high fluxes. The high-frequency flow reversal is enabled by a vacuum device placed at the retentate side creating a local negative pressure to purge the microsieve from accumulating particles. The method was validated for milk filtration using microsieves with 0.9μm circular pores with a trans-membrane pressure (TMP) of 0.05-0.30bar and flow-reversal frequencies between 5 and 25Hz. Stable filtration (for at least 4h) was achieved with permeate fluxes for skimmed milk from 8 to 50m3h-1m-2 at room temperature, and for whole milk from 7 to 13 m3h-1m-2 at 50°C. The effect of the TMP, rotation frequency and flow-reversal strength on the flux was investigated. The flux increased proportional with the TMP up to a critical TMP of about 250mbar. Also the flux increased with rotation frequency up to an optimal frequency of 20Hz. The flow-reversal unit requires a threshold backward flow to create enough negative pressure to overcome the TMP during the removal cycle of the retentate particles. Above this threshold the flux increases strongly with increasing backward flow. The novel high-frequency flow-reversal method enables continuous milk filtration of large volumes during many hours without the need of a chemical cleaning cycle.

KW - Back pulsing

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KW - Fouling control

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