SBIR 95-1 SOLICITATION

PROJECT SUMMARY

Proposal Number:

12.08-8008D

Project Title:

MEMBRANE FOR SELECTIVE REMOVAL OF AMMONIUM IONS FROM SPACECRAFT RECYCLED WATER

Technical Abstract:

This proposed program addresses the use of an ammonium ion-selective mem- branes in a flow cell configuration to remove low levels of ammonium ions from the effluent stream . Future extended manned space missions will require regenerable life support systems utilizing bioreactors, plants and micro- organisms for recycling water. Regenerative techniques are needed to remove ammonium ion from bioreactor process effluent streams without generating expendables. The concentrations occur in the range of 500 to less than 1 ppm. The ammonium ion is generated as a decomposition product of urea and over time will build in concentration, thus rendering the water unsuitable for human con- sumption. In a self contained system such as a space shuttle recycling of all water for human consumption will be primary to the success of long term missions. The proposed program will address the removal of ammonium ion from effluent streams without the co-production of expendables by using an ammonium ion selective membrane in a two compartment electrodialysis cell. The ammonium ion selective membrane was developed for use in an ion selective electrode.

Potential Commercial Applications:

Groundwater treatment, wastewater treatment, water purification

Name and Address of Offeror:

Eltron Research, Inc.
2830 Wilderness Place
Boulder, CO 80301