Each period where antifoam was added in the influent
Each BGB-324 where antifoam was added in the influent feedstock was followed by a foam regeneration period where no antifoam was added. This was done in order to investigate the long term capability of antifoams in preventing foaming. Surprisingly, it was recorded that shortly after the discontinuation of antifoams (approximately 2 days) the foam was regenerated at almost equal quantities as in the initial stated (i.e. before any addition of antifoam).