Research Papers by Anja Drews

The role of EPS is not clear to date. A literature review suggests that its importance is greater at lower SRTs and during unsteady operation. Fluctuating levels of dissolved oxygen and nitrate appear to have a profound impact on EPS uptake rate and thereby on EPS concentration. However, higher diss

[4] for dead-end cake filtration and pore blockage and the model of Fradin and Field [3] for crossflow cake filtration. Although the filterability of activated sludge was determined in a crossflow test cell, we usually observed the mechanism of dead-end cake filtration. The crossflow filtration mech

Extracellular polymeric substances (EPS) are considered as the major cause of membrane fouling in membrane bioreactors. Recent studies have revealed a linear relationship between fouling rate (increase of filtration resistance over time) and polysaccharide (PS) concentration [1]. Several factors lik

Fermentations, utilizing a membrane bioreactor (MBR) can be advantageous as cells are retained in the vessel while soluble products are continuously withdrawn. It can be operated at high cell density, which allows increased productivity. Since hydraulic and solids residence times are independent of