Just spent 4day's over in Portugal teaching someone how to make bio.
When I got there I was met by a few home brewers and the guy I went to teach , all standing round a new 500L machine full of crap wet oil and soap. These guys had had a go before I got there and felt really pleased that they had made really good bio.
The way they test it is to do a 50/50 test and if the water phase is resly white and soapy then it's a pass , then they water wash and use. I did ask how they dry the bio but was told this is not something they do.
I think I have a lot of work to do over the next few months
They did think I was crazy when I told them I would convert oil for them that titrated at 85 but after 3days and some good bio I think they will trust me
What a week
Paul