Influence of reduced cleaning-in-place on aged membranes during ultrafiltration of whey

TY - JOUR

T1 - Influence of reduced cleaning-in-place on aged membranes during ultrafiltration of whey

AU - Berg, Thilo Heinz Alexander

AU - Ipsen, Richard

AU - Ottosen, Niels

AU - Tolkach, A.

AU - van der Berg, Franciscus Winfried J

PY - 2015/8/1

Y1 - 2015/8/1

N2 - Optimization of cleaning-in-place (CIP) procedures using bench-scale equipment is severely restricted by the short testing times (typically 1-3 days) compared with the normal lifespans of industrial membrane materials (years). In our research, industrially used polyethersulfone membrane material (aged membrane) was migrated to a lab-scale filtration apparatus. Performance (flux) of aged membranes was found to be 10% lower compared to new membranes of the same specification. For each set of membranes, performance was on the same level during multiple filtrations with intermediate CIPs. Reducing the CIP from a three-step procedure (caustic, enzymatic, acid) to only one step (caustic) had no influence on subsequent filtration performance even though flux recovery after reduced CIP was as low as 38% compared to 90% after three-step CIP. Consequences of reduced cleaning could first be observed in the subsequent CIP where the level of resistance during the respective CIP steps was increased.

AB - Optimization of cleaning-in-place (CIP) procedures using bench-scale equipment is severely restricted by the short testing times (typically 1-3 days) compared with the normal lifespans of industrial membrane materials (years). In our research, industrially used polyethersulfone membrane material (aged membrane) was migrated to a lab-scale filtration apparatus. Performance (flux) of aged membranes was found to be 10% lower compared to new membranes of the same specification. For each set of membranes, performance was on the same level during multiple filtrations with intermediate CIPs. Reducing the CIP from a three-step procedure (caustic, enzymatic, acid) to only one step (caustic) had no influence on subsequent filtration performance even though flux recovery after reduced CIP was as low as 38% compared to 90% after three-step CIP. Consequences of reduced cleaning could first be observed in the subsequent CIP where the level of resistance during the respective CIP steps was increased.

U2 - 10.1515/ijfe-2014-0240

DO - 10.1515/ijfe-2014-0240

M3 - Journal article

SN - 1556-3758

VL - 11

SP - 447

EP - 455

JO - International Journal of Food Engineering

JF - International Journal of Food Engineering

IS - 4

ER -