Nitrite accumulation characteristics of high strength ammonia wastewater in an autotrophic nitrifying biofilm reactor

Yun, Ho-Joon and Kim, Dong-Jin (2003) Nitrite accumulation characteristics of high strength ammonia wastewater in an autotrophic nitrifying biofilm reactor. Journal of Chemical Technology and Biotechnology, 78 4: 377-383. doi:10.1002/jctb.751


Author Yun, Ho-Joon
Kim, Dong-Jin
Title Nitrite accumulation characteristics of high strength ammonia wastewater in an autotrophic nitrifying biofilm reactor
Journal name Journal of Chemical Technology and Biotechnology   Check publisher's open access policy
ISSN 1097-4660
0268-2575
Publication date 2003-04
Sub-type Article (original research)
DOI 10.1002/jctb.751
Volume 78
Issue 4
Start page 377
End page 383
Total pages 7
Place of publication Chichester, United Kingdom
Publisher John Wiley & Sons for Society of Chemical Industry
Collection year 2003
Language eng
Subject C1
290699 Chemical Engineering not elsewhere classified
710702 Waste management and recycling
Formatted abstract
Selective nitrification was carried out to accumulate nitrite from high strength ammonia wastewater in an autotrophic nitrifying biofilm reactor. Nitrification efficiencies and nitrite accumulation characteristics were investigated at various operating conditions such as ammonium load, oxygen supply and free ammonia concentration. The biofilm reactor showed very stable nitrification efficiencies of more than 90% at up to 2kgNH4-Nm-3 d-1 and the nitrite content was maintained at around 95%. Inhibition by free ammonia on nitrite oxidizers seems to be the major factor for nitrite accumulation. Batch kinetic analyses of ammonium and nitrite oxidation showed that nitrite oxidation activity was selectively inhibited in the presence of free ammonia. However, the activity recovered quickly as the free ammonia concentration decreased below the threshold inhibition concentration. Examination of specific ammonia and nitrite oxidation activities and the most probable number indicated that the number of nitrite-oxidizing microorganisms in the nitrite-accumulating system was less than that in the normal nitrification system due to long-term free ammonia inhibition of the nitrite oxidizers. The reduced population of nitrite oxidizers in the biofilm system was also responsible for the accumulation of nitrite in the biofilm reactor. © 2003 Society of Chemical Industry.

Language of Original Document
Keyword Ammonia inhibition
Biofilm
MPN
Nitrification
Nitrite accumulation
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
2004 Higher Education Research Data Collection
 
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Created: Wed, 15 Aug 2007, 01:37:28 EST