Mineral Recovery Systems for Humans in a CELSS 921237
The recovery of important minerals, salt (NaCI) and potassium (K), in a closed system, namely CELSS is discussed. NaCI is needed for humans, but is potentially harmful to plants. Salt is recovered after wet oxidation of urine. Since Na and K have similar chemical and physical properties, their recovery or separation may require sophisticated methods. Na, CI and K ions are separated from other ions by electrodialysis with univalent selective ion-exchange membranes and then NaCI is obtained separately by a crystalization process. Preliminary experiment on crystalization of NaCI-KCl mixed solutions showed a good separation result.
Citation: Kurokawa, H., Sawa, T., Ashida, A., Hamano, N. et al., "Mineral Recovery Systems for Humans in a CELSS," SAE Technical Paper 921237, 1992, https://doi.org/10.4271/921237. Download Citation
