Treatment Performance of Membrane Aerated Biofilm Reactor on Domestic Wastewater for Manned Space Missions
A membrane-aerated biofilm reactor(MABR)was established to test the feasibility of treating the wastewater generated in planetary base or long-term flight.The performance test on the synthetic space wastewater from urine and hygiene wastewater was conducted.During the 376-day experimental period,the reactor was initiated,acclimated,and fed with planetary base wastewater and transit wastewater containing different fraction volume of urine to investigate the treatment per-formance.The experimental results suggested that the MABR could achieve 97%TOC removal and 83%TN removal for domestic wastewater with 10 vol%of urine;it could achieve 99%TOC removal and 92%TN removal for domestic wastewater with 40 vol%of urine;and it could achieve 98%TOC removal and 65%TN removal for transit wastewater.Denitrifying bacteria with high abundance,to-gether with some anammox bacteria were detected from the sludge samples.MABR exhibited a steady performance of TOC and TN removal for 286 days,indicating its potential as a wastewater treatment unit in manned space missions.
Membrane Aerated Biofilm Reactorplanetary base domestic wastewaterbiological ni-trogen removalEnvironmental Control and Life Support System
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