Separation Technology of On-Orbit Liquid and Excrement (STOOLE)

The Paragon Space Development (Paragon) Separation Technology of On-Orbit Liquid and Excrement (STOOLE) extends our successful, NASA and Boeing Brine Processor Assembly (BPA), and Humidity Control System (HCS) to create a feces and mixed waste water recovery system. This technology uses low grade heat and low-power air motivation and has met NASArsquo;s goal for 98% water recovery from liquid waste. While NASA has stated the system does not need to purify the water, STOOLE uses chemically selective membranes to limit concern for undesirable constituents in the product vapor, allowing it to be condensed and processed locally or by the Environmental Control and Life Support System (ECLSS). STOOLE replaces the expendable TKO canister with a reusable system with functional elements isolated from the solid waste to ensure long duration, low cost operation. The STOOLE product is anticipated to be very low in free water and our Phase I study includes an investigation into solid product upcycling though torridification, use as 3D printing filler, or filler in a fused polymer product.