Continuous fed-batch alternating aerobic and anoxic system for biodegradation of Decontaminating Solution 2 with high nitrogen content
| Autor: | Jin Hyung Lee, Michael H. Kim, Joseph J. DeFrank, Hyunook Kim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
lcsh:TC401-506 lcsh:TD201-500 Denitrification Hydraulic retention time Chemistry lcsh:River lake and water-supply engineering (General) 010501 environmental sciences Biodegradation Pulp and paper industry lcsh:HD9502-9502.5 01 natural sciences Anoxic waters lcsh:Energy industries. Energy policy. Fuel trade 03 medical and health sciences 030104 developmental biology lcsh:Water supply for domestic and industrial purposes High nitrogen Denitrification process Degradation (geology) Nitrification 0105 earth and related environmental sciences |
| Zdroj: | Water-Energy Nexus, Vol 1, Iss 1, Pp 47-55 (2018) |
| ISSN: | 2588-9125 |
| Popis: | A continuous fed-batch alternating aerobic and anoxic (CFBAAA) activated sludge system was developed for biodegradation of the US Army’s Decontaminating Solution 2 (DS2). The high nitrogen content in DS2 (approximately 28.5% by weight) necessitated a new nitrification/denitrification process scheme for biological nitrogen removal. Nitrification, conversion of NH4+ from the DS2 degradation to NO3−, is accomplished simultaneously along with the DS2 degradation under aerobic conditions, and denitrification, conversion of accumulated NO3− to N2, is achieved under anoxic conditions in which the air supply is ceased. A one-day cycle with 16 h air-on and 8 h of air-off was used. Overall, the CFBAAA system could achieve COD removal of >97% and TN of >99% at a hydraulic retention time of 16 d, when 1% DS2 (equivalent to 17,500 mg COD L−1 and 2850 mg N L−1) was fed. In addition, due to its cyclic operation mode, the CFBAAA system could reduce 1/3 of electricity consumption compared to the conventional activated sludge system. |
| Databáze: | OpenAIRE |
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