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Bioregenerative Waste Water Reclamation Using an Activated Sludge Waste Water Processor With Cross-Flow Filtration Biomass Recycle
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Abstract
Activated sludge waste water processing is one of the most common technologies used in municipal waste water treatment facilities. Bioregenerative waste water treatment research at the NASA Johnson Space Center has, however, focused on the use of attached growth bioreactors due to their advantageous solids retention capability. The development of cross flow filtration methodologies in recent years has provided a means for significantly increasing solids retention time of activated sludge reactors. The settling tank traditionally used in municipal activated sludge processes for biomass retention is replaced with a microgravity compatible cross-flow biomass filter. The resulting activated sludge reactor has entirely independent solids and hydraulic retention times that may be modified as necessary to enhance processing performance. This paper describes the development of such an activated sludge bioreactor and the performance characteristics achieved to date.
Results of an activated sludge reactor without biomass filtration indicated that at a Hydraulic Retention Time (HRT) of 5 days, TOC reduction was maintained at or above 95% and ammonium conversion at about 75%. When the HRT was reduced to 2 days, TOC reduction remained above 90%, but ammonium nitrification dropped to less than 10%. With the addition of the biomass cross-flow filter at an HRT of 2 days, the activated sludge reactor was able to maintain a TOC reduction of greater than 91% and an ammonium conversion near 60%. Ammonium conversion rates were more than double that of the filterless configuration even at the 5 day HRT. Flow across the filter element decreased significantly (3.2 to 1 L/day) over the weekly regeneration cycle implemented, but no permanent loss of performance was observed. Results were complicated by the development of simultaneous nitrification and denitrification reactions occurring in the bioreactor. This novel behavior is thought to have hampered the ability of the ASR to completely convert ammonium in the waste water feed stream.
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Citation
Schweickart, R. and McFadden, C., "Bioregenerative Waste Water Reclamation Using an Activated Sludge Waste Water Processor With Cross-Flow Filtration Biomass Recycle," SAE Technical Paper 961571, 1996, https://doi.org/10.4271/961571.Also In
References
- Henninger, D.L. Tri, T.O. Advanced Life Support Project Plan in Support of the Office of Life and Microgravity Sciences and Applications Advanced Life Support Program NASA JSC Houston, TX June 1994
- Bacskay, A.S. DaLee, R.C. Space Station Freedom ECLSS Design Configuration: A Post Restructure Update SAE Paper No. 911414 Space Station ECLSS and Thermal Control SAE Warrendale, PA July 1991
- Carraquillo, R.L. Carter, D.L. Holder, D.W. McGriff, C.F. Ogle, K.Y. ECLSS Regenerative Systems Comparative Testing and Subsystem Selection SAE Paper No. 911415 Space Station ECLSS and Thermal Control SAE Warrendale, PA July 1991
- Jolly, C. D. Bagdigian, R. M. Application of Biocatalysts to Space Station ECLSS and PMMS Water Reclamation SAE Paper No. 891442 International Congress and Exposition Detroit, MI Feb 27 Mar 3 1989
- Petrie, G.E Nacheff-Benedict, M.S. Development of Immobilized Cell Bioreactor Technology for Water Reclamation in a Regenerative Life Support System SAE Paper No. 911503 Regenerative Life Support Systems and Processes SAE Warrendale, PA July 1991
- Verostko, C.E. Edeen, M. A. Packham, N.J.C. A Hybrid Regenerative Water Recovery System for Lunar/Mars Life Support Applications SAE Paper No. 921276 22nd International Conference on Environmental Systems Seattle, WA July 13-16 1992
- Kumagai, G.H. Detailed Bioreactor Computer Model Overview and Results NASA JSC October 1994
- Petrie, G.E. Dismer, B.G. Zinger, E.F. Nacheff-Benedict, M.S. Immobilized Cell Bioreactors for Water Reclamation: Process Stability and Effects of Bioreactor Design SAE Paper No. 921227 22nd International Conference on Environmental Systems Seattle, WA July 13-16 1992
- Nacheff-Benedict, M.S. Kumagai, G.H. Petrie, G.E. Schweickart, R.W. McFadden, C.D. Edeen, M.A. An Integrated Approach to Bioreactor Technology Development for a Regenerative Life Support Primary Water Processor SAE Paper No. 941397 24th International Conference on Environmental Systems Friedrichshafen, Germany June 20-23 1994
- Suidan, Makram T. University of Cincinnati 1996
- Supra, L.N. Kumagai, G.H. Landau, L.M. Zinger, E.F. Schweickart, R.W. McFadden, C.D. Advancements in Regenerative Life Support Waste Water Bioprocessing Technology SAE Paper No. 961572 26th International Conference on Environmental Systems Monterey, CA July 8-11 1996
- Bailey, J.E. Ollis, D.F. Biochemical Engineering Fundamentals McGraw-Hill Book Co. New York, NY 1977
- Edeen, Marybeth NASA Crew Thermal Systems Division 1996
- Robertson, L.A. Advanced Courses on Environmental Biotechnology Delft University of Technology The Netherlands 1994
- Munch, E.V. Lant, P. Keller, J. Simultaneous Nitrification and Denitrification in Bench-Scale Sequencing Batch Reactors Water Research 30 277 284 1996
- Kugelman, I.J. Spector, M. Harvilla, A. Parees, D. Aerobic Denitrification in Activated Sludge Environmental Engineering Special Conference Krenkel, P.A. 312 318 Am. Soc. Civil Engrs. 1991