Characterisation of the fouling of an ultrafiltration polyethersulfone membrane fouled by an emulsion modelling lipids issued from Microalgae

HAL Id: hal-02353535

https://hal.archives-ouvertes.fr/hal-02353535

Submitted on 7 Nov 2019

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Characterisation of the fouling of an ultrafiltration

polyethersulfone membrane fouled by an emulsion

modelling lipids issued from Microalgae

V Drevet, S. Liu, E Clavijo Rivera, L Villafaña López, M Frappart, Estelle

Couallier, A Szymczyk, M Rabiller Baudry

To cite this version:

V Drevet, S. Liu, E Clavijo Rivera, L Villafaña López, M Frappart, et al.. Characterisation of the fouling of an ultrafiltration polyethersulfone membrane fouled by an emulsion modelling lipids issued from Microalgae. ICOM, Jul 2017, San Francisco, United States. �hal-02353535�

Characterisation of the fouling of an ultra1iltration polyethersulfone membrane

fouled by an emulsion modelling lipids issued from Microalgae

V. Drevet

1

_,

_{S. Liu}

2

_{, E. Clavijo Rivera}

2

_{, L. Villafaña López}

2

_{, M. Frappart}

2

_{, E. Couallier}

2*

_{, A. Szymczyk}

1

_{, M. Rabiller Baudry}

1*

1

_{Université de Rennes 1, Université Bretagne Loire, Institut des Sciences Chimiques de Rennes, France}

2

_{CNRS, Université de Nantes, Université Bretagne Loire, Laboratoire GEPEA, Saint Nazaire, France}

Context /Objectives

q  Microalgae can transform CO

₂

in biomass and in high value molecules such as triglycerides, proteins or polysaccharides.

q Membrane filtration is a promising process for Microalgae biorefinery : low energy consumption / integrity of all valuable compounds / valorization of all fractions.

q However integration of membranes is not trivial because of the complexity of feed solutions that may contain cell fragments, lipids, etc.

q This work aims at the integration of ultrafiltration for the recovery of lipids.

è A synthetic Oil /Water emulsion was formulated based on the lipids profile of a microalgae cultured under nitrogen starving conditions

è Fouling was characterized thanks to permeate flux, ATR-FTIR and streaming current measurements

-  Strain:

P. kessleri

Membranes Screening

thanks to Emulsion filtration.

Emulsion preparation

Hydrophilic

part

Hydrophobic

part

Surfactant

Membranes Screening: UF, MF

Hydrophilic: PAN, PES/PVP

Hydrophobic: PVDF

Hydrophobicity

Water contact angle

Fouling characterization

Charge: Streaming current

è Zeta potential

Identification/quantification

ATR-FTIR

flat membranes (130 cm

2

₎

Cross-flow filtration (1 m.s

-1

_{) at 30°C}

TMP = 0.2 - 0.4 bar

Increasing VRR= 1 -4

Retentate

Emulsion

Permeate

membrane

Membrane selection

Pre-homogenization at 85°C

Stirring: 24,000 rpm

Mixer: Ultraturrax, 30 min

Cooling

Characterization

of Lipids

produced by a

microalgae

-  cultured under

nitrogen starving

conditions

-  Grinding

-  Centrifugation

-  Characterization

of Lipids in

supernatant

Emulsion

formulation

_{-  Permeate flux}

-  Retention

-  Reversible / irreversible Fouling

-  Cleanability

O/W emulsion: 20 g.L

-1

-  14 g.L

-1

_neutral

lipids (vegetable oils

mixture)

-  6 g.L

-1

_{polar lipids}

as surfactants

conductivity= 790 µS.cm

-1

pH = 7.4

Membrane

Polymer

MWCO / pore

size

Critical

TMP

(bar)

Lp

_water

L

_⋅

h

-1

_⋅

_m

-2

_⋅

_bar

-1

Lp

_emulsion

L

_⋅

h

-1

_⋅

_m

-2

_⋅

_bar

-1

Lp

_emulsion

/ Lp

_eau

J

_cleaned

membrane

/ J

_water

Lipid

Retention

PAN

500 kg.mol

-1

_0.25-0.40

_{82 – 325}

_{63 – 160}

_{0.5 – 0.8}

_0.92

_0.985

PES/PVP

200 kg.mol

-1

_0.26-1.00

_20-152

_15-85

_{0.5-0. 8}

_0.81

_0.987

PVDF

0.4 μm

0.20-0.25

50-250

50-110

0.4-0.9

0.98

0.946-0.985

PVDF

1.5 μm

0.25

51

27

0.5

0.86

0.966-0.981

-80

-70

-60

-50

-40

-30

-20

-10

0

Ze

ta

po

te

n3

al

(m

V)

0

5

10

15

20

25

1

10

Per

meate

1lux (

L.h

-1.m-2)

VRR

PES 200 KDa

PAN 500 KDa

PVDF 0,4 µm

PVDF 1,5 µm

July 29- August 4 - 2017

San Francisco, USA, Poster P1.257

Modelling of Oil / Water emulsion and general approach

q

 

UF /MF

è

PAN membrane: the best one

q

 

UF virgin / fouled membranes:

Zeta potential

ATR-FTIR

0 5 10

pH

Virgin PAN

Fouled PAN

Virgin PES/PVP

Fouled PES/PVP

q The

PES/PVP membrane

isoelectric point increased after fouling

q The

PAN membrane

charge was more negative after fouling

q Fouling had more impact on the PAN membrane surface charge than on PES/PVP membrane

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

600

800

1000

1200

1400

1600

1800

A

b

so

rb

an

ce

(

au

)

Wavenumber (cm-1

)

Lipids

1744

C=O

PES

1577

C=C

PVP

1660

C=O

PES/PVP membrane

o

 Virgin

o

 

Fouled by o/w emulsion at 0.25 bar

o Fouled by dry deposit of 1926 µg.cm

-2

advocado oil ---

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0

500

1000

1500

2000

2500

H

1744

/ H

1577

Vegetable oil (µg.cm

-2

₎

*estelle.couallier@univ-nantes.fr

murielle.rabiller-baudry@univ-rennes1.fr, anthony.szymczyk@univ-rennes1.fr