Membrane Filtration methods are applied to treat the waste water for re-usage.
What filtration method is not a membrane filtration method?
Reverse osmosis
Microfiltration
Centrifugal filtration
In "Membrane Filtration", how do you call the purified water that can be reused in the washing process?
Retentate
Permeate
Feed
You have decided to select ultrafiltration membranes that are very robust against the very acidic and alkaline products in addition to high temperature conditions. Which UF membranes will you buy?
Tubular polymeric membranes
Ceramic membranes
Polysulfone polymeric membranes
Why is prefiltration so important when using membrane technology?
To avoid clogging up the membranes
To increase the yield (recovery) of the membrane filters
To avoid microbial growth on the membranes
You are trying to reduce the concentration of heavy metal ions such as zinc and lead in the effluent.What filtration method can be used to remove heavy metal ions?
Gravitary filtration
Microfiltration
Reverse osmosis
What yield (recovery) should we typically expect from a 2-stage reverse osmosis installation?
75%
100%
25%
What membrane filtration technique is often used in combination with RO filtration as a pretreatment step?
Vacuum filtration
Nanofiltration
Ultrafiltration
Why is it important to add an antiscalant product in a RO installation?
To prevent the formation of a biofilm
To prevent clogging up of the membrane by colloids
To prevent the build up of anorganic materials
What products can degrade a RO membrane if not neutralised?