hello professor it seems that you have not uploaded the third video, incase you are still keeping track of this channel i just wanted to point out that there is at least one person out there who is now looking forward to it.
Dear Naren, Thanks for your comment and also that you found the video informative. Vbr/Magnus PS Not a Professor but with some interesting research I managed to reach PhD in 2007 😀 DS
There are several different membrane suppliers so best way too Google and then contact. However, there are two different type of membranes for MBR - Flat sheet (eg supplier Kubota) and hollow fibre (eg supplier Koch). So when you Google you can add the term flat sheet or hollow fibre. Good luck Br Magnus