Development of simultaneous partial nitrification, anammox and denitrification (SNAD) process in a sequential batch reactor.
Simultaneous partial nitrification, anammox and denitrification (SNAD) process was developed in a sequential batch reactor (SBR) and the influence of hydraulic retention time (HRT) on the SNAD process was investigated. Around 96% NH(4)(+)-N removal and 87% COD removal were observed at 9 d HRT. Marginal decreases in the removal efficiencies were observed when the HRT was reduced to 3d or the loading rate was increased by three times. On the other hand, a drastic decrease in NH(4)(+)-N and COD removals were observed when the DO, pH and temperature were dropped shockingly. The response of the SNAD system towards the shock in substrate loading and operating conditions was evaluated by sensitivity index. Finally, the extent of total nitrogen (TN) removal by partial nitrification with anammox and denitrification was modeled using stoichiometric relationship. Modeling results indicated a TN removal of 85-87% by anammox with partial nitrification and 7-9% by denitrification.
Institute of Environmental Engineering, National Chiao Tung University, 1001 University Road, Hsinchu City 30010, Taiwan, ROC.
Chien-Ju
CJ
Lan
Mathava
M
Kumar
Chih-Cheng
CC
Wang
Jih-Gaw
JG
Lin
D000693:Anaerobiosis; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology*; D058440:Denitrification; D006863:Hydrogen-Ion Concentration; D008956:Models, Chemical; D058465:Nitrification; D010084:Oxidation-Reduction; D010100:Oxygen / Q000032:analysis; D000644:Quaternary Ammonium Compounds / Q000378:metabolism*; D012995:Solubility; D013997:Time Factors; D014865:Waste Disposal, Fluid; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods*
D000644:Quaternary Ammonium Compounds; D010100:Oxygen