Backwashing With Special Pump & Disconnected Feed Pump; Adjustment Of Filtrate Flow - MANN+HUMMEL MICRODYN MD020CP2N User Manual

5.4.3 Backwashing with Special Pump & Disconnected Feed Pump
In some cases, backwashing is better than back pulsing. It is not used often – typically performed once every hour, but for a longer
period of time (between 10 – 60 seconds). Backwashing is also done with the feed pump disconnected. For this procedure, a
bigger filtrate storage vessel is needed and may require a sterile air vent filter.
Figure 14.. Flow diagram of PBP with the second filtrate socket.
5.5

ADJUSTMENT OF FILTRATE FLOW

At very high filtrate flow (high membrane permeability) there is a high potential for mechanical blocking or fouling of the
membranes. To maintain good membrane performance, it is best to limit and control the flow of filtrate by throttling the regulator
valve (VR).
Timer
Deaeration
Compressed Air
Permeate
VR
FI
PI TI PI
Concentrate
Feed
®
SEPRODYN
Module
Circulation Pump
Figure 15. Flow diagram showing the adjustment of filtrate flow with regulator valve VR.
MICRODYN CAPILLARY MODULES | USER MANUAL
MANN+HUMMEL Water & Fluid Solutions | REVISION DATE: 09/09/2021 16