Thanks for all the responses, some great info.
The Lufthansa Cyclean system seems to be the one that comes up allot.
Easaman, thanks for the link to those videos.
Boeing_eng, The Ecopower system is an interesting looking product. And they have some great info on their website also, which I'm going to check out. The crushed nut shells sounds like a ingenious solution, must have been a great job preparing all the shells....a full day eating pistachio nuts.
Imperial shifter, thanks for your post, and the info about assessing the effectiveness of the procedure. I get what your saying about pleasing greenies, it'll be the first time I ever been accused of that
I would be very interested if anyone has any info on the procedure, like a standard operating procedure that is currently in use. Also if anyone has any info about the intervals between washes it'd be greatly appreciated.
Thanks,
P