Three four-liter packed-bed anaerobic digesters were designed and fabricated to study the resource recovery and epidemiology of a pathogenic bacteria species in a controlled ecological life support system (CELSS). The digesters were operated at 35 +- 2 deg C, pH around 7, and hydraulic retention time (HRT) of 20, 10 and 5 days. Polypropylene pall rings with 5/8" size were used as the packing material to immobilize the anaerobic bacteria. Anaerobic seeding from alocal municipal wastewater plant was used for acclimation and study. Simulated wastewater was used as the feeding solution.
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