Critical Flux Evaluation Based on Flux Cycling and Flux Stepping Methods

Abstract

In the present study, the effect of filtration methods on critical flux assessment was investigated including flux stepping method and flux cycling method.  Experiments were carried out on a pilot-scale membrane bioreactor (MBR) treated wastewater.  The results indicated a decline in critical flux values as the step height increased based upon the flux cycling method, while there is a positive relationship between critical flux values and step height presenting in the flux stepping filtration.  On the other hand, the step length has no obvious effect on critical flux values evaluated by both critical flux determination methods.