Journal
BIORESOURCE TECHNOLOGY
Volume 202, Issue -, Pages 101-106Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.11.088
Keywords
EPSs in aerobic granular sludge; Adsorbed various nitrogen forms; Simultaneous nitrification and; denitrification; Enhanced nitrogen removal
Funding
- National Natural Science Foundation of China [51208084]
- Young Academic Backbone Support Project of Heilongjiang Province [1254G010]
- Northeast Agricultural University [15XG07]
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In this study, role of extracellular polymeric substances (EPSs) in enhancing nitrogen-removal from ammonium-nitrogen-rich wastewater using aerobic granular sludge (AGS) technology were analyzed. AGS enabled ammonium oxidation and denitrification to occur simultaneously. Air stripping and simultaneous nitrification-denitrification contributed to total-nitrogen removal. Clone-library analysis revealed that close relatives of Nitrosomonas eutropha and heterotrophic denitrifiers were dominant in the AGS, whereas anammox bacteria were not detected. EPSs adsorption of ammonium, nitrite, and nitrate nitrogen results in improved removal of nitrogen in batch experiments. (C) 2015 Elsevier Ltd. All rights reserved.
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