Brine Processor Assembly (BPA) (IMAGE) NASA/Johnson Space Center Caption Brine Processor Assembly (BPA). The BPA's dual-membrane bladder works to recover additional water from urine brine. Credit NASA/Robert Markowitz Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.