Correlation between nitrite accumulation and the concentration of AOB in a nitritation reactor

Title
Correlation between nitrite accumulation and the concentration of AOB in a nitritation reactor
Authors
임지열정진영배효관김대익길경익
Keywords
Nitrifiaction; 16s rDNA; nitrite accumulation; Recycle water; Nitrite; Ammonia oxidizing bacteria (AOB); Municipal wastewater treatment plant (MWTP); Nitritation
Issue Date
2014-07
Publisher
Environmental earth sciences
Citation
VOL 72, NO 1, 289-297
Abstract
Nitritation is an innovative biological nitrogen removal method in wastewater, and it has the advantages of energy and economy. The correlation between a nitrite conversion rate and the gene copy numbers of ammonia oxidizing bacteria (AOB) in a nitritation reactor was examined to measure the effectiveness of removing a nitrogen content in a biological nitrogen removal process, using a biological process of nitritation. A laboratory scale reactor was prepared and operated for over a year, using digester supernatant to induce a stable nitritation, and to optimize the operational conditions by adjusting various operating factors. The relationship between operational results of nitritation reactor and the AOB gene copies was approximated through identification and quantitative analysis of AOB. A stable nitritation can be artificially led with the control of SRT, while treating anaerobic digester supernatant from MWTPs. And AOB gene copies showed a correlation with free ammonia (FA) inhibition and performance of nitritation, and AOB activity. Thus, AOB gene copies were found important when it comes to analyzing nitritation.
URI
http://pubs.kist.re.kr/handle/201004/47727
ISSN
18666280
Appears in Collections:
KIST Publication > Article
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