Cross-flow microfiltration of fermentation broth containing native corn starch

Cross-flow microfiltration using ceramic tubular membrane was applied for treatment of steepwater from corn starch industry. Experiments are conducted according to the faced centered central composite design at three different transmembrane pressures (1, 2 and 3 bar) and cross-flow velocities (100, 150 and 200 L/h) with and without the usage of Kenics static mixer. For examination of the influence of the selected operating conditions at which usage of the static mixer is justified, a response surface methodology and desirability function approach were used. Obtained results showed improvement in the average permeate flux by using Kenics static mixer for 211 % to 269 % depending on experimental conditions when compared to the system without the static mixer. As a result of optimization, the best results considering flux improvement as well as reduction of specific energy consumption were obtained at low transmembrane pressure and lower feed cross-flow rates.

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Separation of lactic acid from fermentation broth by cross flow nanofiltration: Membrane characterization and transport modelling

Desalination ◽

10.1016/j.desal.2011.12.009 ◽

2012 ◽

Vol 288 ◽

pp. 47-57 ◽

Cited By ~ 40

Author(s):

Pinaki Dey ◽

Lassi Linnanen ◽

Parimal Pal

Keyword(s):

Lactic Acid ◽

Fermentation Broth ◽

Cross Flow ◽

Nanofiltration Membrane ◽

Transport Modelling ◽

Membrane Characterization

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Cross-Flow Microfiltration of Glycerol Fermentation Broths with Citrobacter freundii

Membranes ◽

10.3390/membranes10040067 ◽

2020 ◽

Vol 10 (4) ◽

pp. 67 ◽

Cited By ~ 4

Author(s):

Wirginia Tomczak ◽

Marek Gryta

Keyword(s):

Colloidal Particles ◽

Ceramic Membrane ◽

Fermentation Broth ◽

Cross Flow ◽

Transmembrane Pressure ◽

Citrobacter Freundii ◽

Permeate Flux ◽

Glycerol Fermentation ◽

Fermentation Broths ◽

The Impact

This paper reports the study of the cross-flow microfiltration (MF) of glycerol fermentation broths with Citrobacter freundii bacteria. A single channel tubular ceramic membrane with a nominal pore size of 0.14 µm was used. It has been demonstrated that the MF ceramic membrane has been successfully applied to bacteria cell removal and to effectively eliminate colloidal particles from glycerol fermentation broths. However, due to fouling, the significant reduction of the MF performance has been demonstrated. In order to investigate the impact of transmembrane pressure (TMP) and feed flow rate (Q) on MF performance, 24 experiments have been performed. The highest steady state permeate flux (138.97 dm3/m2h) was achieved for 0.12 MPa and 1000 dm3/h. Fouling analysis has been studied based on the resistance-in series model. It has been found that the percentage of irreversible fouling resistance during the MF increases with increasing TMP and Q. The permeate flux regeneration has been achieved by membrane cleaning with 3 wt % NaOH and 3 wt % H3PO4 at 45 °C. The results of this study are expected to be useful in industrially employing the MF process as the first step of glycerol fermentation broth purification.

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