The development of simultaneous partial nitrification, ANAMMOX and denitrification (SNAD) process in a single reactor for nitrogen removal

The simultaneous partial nitrification, ANAMMOX and denitrification (SNAD) process was validated to potentially remove ammonium and COD from wastewater in a single, oxygen-limited, non-woven rotating biological contactor (NRBC) reactor. An ammonium conversion efficiency of 79%, TN removal efficiency...

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Vydané v:	Bioresource technology Ročník 100; číslo 4; s. 1548 - 1554
Hlavní autori:	Chen, Huihui, Liu, Sitong, Yang, Fenglin, Xue, Yuan, Wang, Tao
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Kidlington Elsevier Ltd 01.02.2009 [New York, NY]: Elsevier Ltd Elsevier
Predmet:	analysis ANAMMOX Bacteria Bacteria - metabolism Bacteria - ultrastructure Biodegradation, Environmental Biofilm Biofilms Biological and medical sciences Bioreactors Biotechnology chemical oxygen demand Denitrification denitrifying bacteria Environmental Restoration and Remediation Environmental Restoration and Remediation - methods fish fluorescence in situ hybridization Fundamental and applied biological sciences. Psychology In Situ Hybridization, Fluorescence isolation & purification metabolism methods nitrification nitrogen Nitrogen - isolation & purification Nitrogen - metabolism Nitrogen Compounds Nitrogen Compounds - analysis Oxidation-Reduction Partial nitrification Quaternary Ammonium Compounds Quaternary Ammonium Compounds - metabolism scanning electron microscopy Sewage Simultaneous nitrogen and COD removal Time Factors ultrastructure Simultaneous nitrogen and COD removal Denitrification Biofilm Partial nitrification ANAMMOX Nitrification Nitrogen Reactor Denitrogenation
ISSN:	0960-8524, 1873-2976, 1873-2976
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Popis
Shrnutí:	The simultaneous partial nitrification, ANAMMOX and denitrification (SNAD) process was validated to potentially remove ammonium and COD from wastewater in a single, oxygen-limited, non-woven rotating biological contactor (NRBC) reactor. An ammonium conversion efficiency of 79%, TN removal efficiency of 70% and COD removal efficiency of 94% were obtained with the nitrogen and COD loading rate of 0.69 kg N/m 3 d and 0.34 kg/m 3 d, respectively. Scanning electron microscopy (SEM) observation and fluorescence in situ hybridizations (FISH) analysis revealed the existence of the dominant groups of bacteria. As a result, the aerobic ammonia-oxidizing bacteria (AOB), with a spot of aerobic heterotrophic bacteria were mainly distributed in the aerobic outer part of the biofilm. However, ANAMMOX bacteria with denitrifying bacteria were present and active in the anaerobic inner part of the SNAD biofilm. These bacteria were found to exist in a dynamic equilibrium to achieve simultaneous nitrogen and COD removal in NRBC system.
Bibliografia:	http://dx.doi.org/10.1016/j.biortech.2008.09.003 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0960-8524 1873-2976 1873-2976
DOI:	10.1016/j.biortech.2008.09.003