Prediction of the circulation velocity in a membrane bioreactor

Membrane fouling in membrane bioreactors—Characterisation, contradictions, cause and cures

“…Both these aspects were taken into account by modifying the Chisti model accordingly [166,169]. In contrast to the slender airlift reactors studied by Chisti et al, MBR tanks typically have significantly different width/height and riser/downcomer cross-section area ratios.…”

Relationships between mechanically induced hydrodynamics and membrane fouling in a novel rotating membrane bioreactor

“…the turbulence is generated by aeration. However, turbulence promotion by aeration needs large bubbles [7], leading to a low oxygen transfer efficiency. Intense aeration may also damage flocs structure through releasing extracel-*Corresponding author.…”

Hydraulic optimization of membrane bioreactor via baffle modification using computational fluid dynamics

“…In order to control fouling with a minimal energy cost, it should be of great significance to optimize the hydraulic condition in the aerated membrane tanks. Baffles play a vital role in the commonly applied airlift MBRs (Liu et al, 2003;Prieske et al, 2008). They divide the membrane tank into a downcomer and an aerated riser section where membranes are usually located.…”

“…However, membrane fouling remains as a challenge for the practical application of MBRs. An important issue associated with membrane fouling is the high energy consumption involved in aeration in membrane tank for fouling control (Liu et al, 2000;Prieske et al, 2008). The power used for aeration in membrane tank could take up about 30-50% of the overall energy consumption for MBR operation.…”