Quick-Scan: Selection of micro- and ultrafiltration membranes

SUR test used for optimisation of membrane filtration plants treating wastewater effluents

“…Filtration and fouling phenomena in UF of WWTP effluent depend both on membrane and feedwater characteristics [ 13 ]. The SUR is especially useful when this interaction is taken into account.…”

“…The time interval between two back flushes is normally 15 up to 30 rain of filtration. It has been suggested that the filtration and fouling phenomena that occur during this short time interval influence the long-term fouling [12,13]. To characterise the short-term effect of interaction between feedwater and membrane with the SUR, the calculated value has to be stable within a time interval of 15 up to 30 min.…”

“…Finally, in dead-end UF the filtration time is 15-30 min, after which the membrane is backflushed. The filtration characteristics of the effluent have to be optimised for this time interval, as a high level of resistance increase during this time interval frequently indicates increased fouling of the membrane over the long run [12,13].…”