Bioburden Control for Space Station Freedom's Ultrapure Water System

Bioburden Control is one of the challenges for the Ultrapure Water System on Space Station Freedom. Bioburden Control must enable the system to deliver water with a low bacterial count (≤ 1 CFU/100 ml), as well as maintain biological contamination at a manageable level, to permit continued production of quality water. Ozone has been chosen as the primary means of Bioburden Control. Planned tests to determine the effectiveness of ozone on free-floating microbes and biofilms are described.