Advanced nitrogen removal with simultaneous Anammox and denitrification in sequencing batch reactor

•A simultaneous Anammox and denitrification was achieved in the SBR system.•The Anammox biomass aggregated as wall growth in SBR.•The maximum nitrogen removal efficiency of 97.47% was realized at C/N of 2.•The Anammox activity recovered rapidly after suppression of high organic matter concentration....

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Bibliographic Details
Published in:Bioresource technology 2014-06, Vol.162, p.316-322
Main Authors: Du, Rui, Peng, Yongzhen, Cao, Shenbin, Wu, Chengcheng, Weng, Dongchen, Wang, Shuying, He, Jianzhong
Format: Article
Language:English
Subjects:
Ammonia - metabolism
Anaerobiosis
Anammox
Bacteria
Batch Cell Culture Techniques - instrumentation
Biodegradation, Environmental
Biological and medical sciences
Bioreactors
Bioreactors - microbiology
Biotechnology
Denitrification
Dosing
Fundamental and applied biological sciences. Psychology
Genes
Methods. Procedures. Technologies
Nitrates
Nitrogen - isolation & purification
Nitrogen removal
Organic Chemicals - isolation & purification
Organic matter
Oxidation-Reduction
Reactors
Sequencing
Sequencing batch reactor
Various methods and equipments
Walls
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Summary:•A simultaneous Anammox and denitrification was achieved in the SBR system.•The Anammox biomass aggregated as wall growth in SBR.•The maximum nitrogen removal efficiency of 97.47% was realized at C/N of 2.•The Anammox activity recovered rapidly after suppression of high organic matter concentration. In this study, a sequencing batch reactor (SBR) was used to achieve advanced nitrogen removal by simultaneous Anammox and denitrification processes. During the entire experiment, the Anammox microorganisms aggregated in the reactor as wall growth. Nitrogen removal was improved due to the reduction of nitrate, and the maximum total nitrogen (TN, including ammonia, nitrite and nitrate nitrogen) removal efficiency of 97.47% was obtained at C/N of 2. However, the sequentially increased organic matter resulted in a poor TN removal performance due to the suppression of Anammox. Fortunately, the Anammox activity completely resumed quickly after stopping dosing organic matter. PCR analysis results revealed that the Anammox bacteria gene copy number was not significantly reduced during the inhibition, which might explain the quick recover.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2014.03.041