Journal article
Energy efficient COD and N-removal from high-strength wastewater by a passively aerated GAO dominated biofilm
Bioresource Technology, Vol.283, pp.148-158
2019
Abstract
Conventional aerobic treatment of high-strength wastewater is not economical due to excessively high energy requirement for compressed air supply. The use of passive aeration avoids the use of compressed air and enables energy efficient oxygen supply directly from the air. This study evaluates a passively aerated simultaneous nitrification and denitrification performing biofilm to treat concentrated wastewater. The biofilm reactor was operated >5-months under alternating anaerobic/aerobic conditions. For 4-times concentrated wastewater, >80% COD (2307 mgL-1h-1) and >60% N (60 mgL-1h-1) was removed at a hydraulic retention time (HRT) of 7h. A double application in the same reactor enabled > 95% COD and 85% N-removal, at an overall HRT of 14h which is substantially shorter than what traditional activated sludge-based systems would require for the treatment of such concentrated feeds. Microbial community analysis showed Candidatus competibacter (27%) and nitrifying bacteria (Nitrosomonas, and Nitrospira) as key microbes involved in COD and N-removal, respectively.
Details
- Title
- Energy efficient COD and N-removal from high-strength wastewater by a passively aerated GAO dominated biofilm
- Authors/Creators
- M.I. Hossain (Author/Creator)L. Cheng (Author/Creator)R. Cord-Ruwisch (Author/Creator)
- Publication Details
- Bioresource Technology, Vol.283, pp.148-158
- Publisher
- Elsevier BV
- Identifiers
- 991005544630207891
- Copyright
- © 2019 Elsevier Ltd.
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.83 Bioengineering
- 3.83.466 Activated Sludge
- Web Of Science research areas
- Agricultural Engineering
- Biotechnology & Applied Microbiology
- Energy & Fuels
- ESI research areas
- Biology & Biochemistry