FOST 2 testing using grey water and bioreactor effluent as the feed
Mangado, Jaione Romero
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The FOST 2 system is designed as a post treatment system to process the effluent from the Membrane Aerated Biological Reactor (MABR) that is under development at NASA Johnson Space Center (JSC), and its function is to remove residual dissolved solids, ammonia, suspended solids, and to provide a physical barrier to microbial and viral contamination. Besides treating the bioreactor’s effluent, the FOST 2 has been tested using grey water collected from the Sustainability Base Building at NASA Ames Research Center (ARC) as the feed solution in order to investigate its capability to be potentially used as a primary treatment system. The FOST 2 system is an integrated membrane system that incorporates a forward osmosis (FO) subsystem and a reverse osmosis (RO) subsystem working in parallel. Differently from its previous version, the FOST 2 integrates a new customized FO membrane module. This paper documents the performance of the system at water recovery rates higher than 90% using both the effluent from the MABR and grey water as the feed.