Identifier
ALS-NSCORT:WM2k
Abstract
Resource recovery is one of the most crucial aspects of long-term survival in interplanetary space travel, and a key aspect of resource recovery lies in urine processing for a potable source of water. Currently, there is a need for an independent, energetically efficient process that achieves a high efficiency of water recovery without a high degree of cleaning problems. Through research initiatives, LiFT technology has taken several forms in the freeze-thaw and in the sublimation regime. While both sides have their own advantages and disadvantages, the former has proven itself as a more efficient process technology. A freeze-thaw technique known as freeze concentration seems to be the optimal method for water extraction from urine. Freeze concentration is a low energy process that focuses on the nucleation of pure ice crystals followed by a ripening effect of those crystals and subsequent washing to achieve high extraction efficiencies. A theoretical water recovery value of approximately 90% has been determined based on the eutectic points of urine constituents. This research effort will focus on four aspects of freeze concentration as follows: Detailed evaluation of inorganic contaminant migration to product ice/water; Detailed evaluation of organic contaminant migration to product ice/water; Detailed evaluation of possible biological contaminant migration to product ice/water; Detailed evaluation of biocidal impacts during freeze concentration
1 slide
Related Documents:WM1, WM2, WM3, WM8
Document Provided By:
Dave Kotterman
Project Lead
James E. Alleman
Date of this Version
November 2004
ALS NSCORT Project Number
Project 1 - Solid Thermophilic Aerobic Reactor (STAR)
Format
.pdf version 1.4 (Acrobat 5.x)
Publisher
ALS-NSCORT
Project Administrator
David Kotterman; dkotter@purdue.edu
ALS NSCORT Series
Internal Documents: Management: External Advisory
Language
English
Rights
Copyright 2004, ALS-NSCORT. All Rights Reserved.
Access
This item is password protected and only available to authorized individuals. To inquire about authorization please contact the project administrator.
Comments
Poster presentation looking at water extraction from urine. Part of Project 1 - Solid Thermophilic Aerobic Reactor (STAR). One presentation in "EAC Presentation 2004" entry.