I have only been to one Belgian brewery Lindemans, back before their was even a tour. You just showed up and they let you walk wherever you wanted in the facility. It didn't look very low oxygen with the huge koelschip but one thing I am sure of is the Belgians are teaching it to their brewery course students, at least at Ku Leuven. Low oxygen practices are all over the Science of Brewing course I took online. Anyone taking this course cannot escape the fact that oxygen is bad at all points in the beer making process. Here are two particularly noteworthy quotes from the classwork:
"Take care of the oxygen ingression during the brewing and of the heat impact during brewing. Grain contains an enormous amount of anti-oxidants that is a gift from Mother Nature. If you destroy it already by having lots of oxygen and a lot of time at really high temperature, there are no natural preservatives anymore in your final beer. For us, that seems a little bit stupid these days, we have it from Mother Nature, why don't we use it? Make sure that, no matter what brewing system you choose, take care of oxygen ingression. Take care about the heat impacts. You need heat, you cannot do anything about that, but try to minimize it as much as you can."
"Since oxygen/ROS is so important in these reactions, oxygen uptake should be avoided at all times in every step of the brewing process, except during wort aeration before yeast fermentation. Oxygen ingress during the brewing process should be avoided: the oxygen content during wort boiling should be limited, as this process step has been shown to be the main step of autoxidation of unsaturated fatty acids."