PMID- 22446054 OWN - NLM STAT- MEDLINE DCOM- 20120829 LR - 20131121 IS - 1873-2976 (Electronic) IS - 0960-8524 (Linking) VI - 114 DP - 2012 Jun TI - The contrast study of anammox-denitrifying system in two non-woven fixed-bed bioreactors (NFBR) treating different low C/N ratio sewage. PG - 54-61 LID - 10.1016/j.biortech.2012.02.113 [doi] AB - Two non-woven fixed-bed bioreactors (NFBR) based on different substrates (nitrite and nitrate) were constructed to study the environmental adaptability for temperature and organic matter of anammox-denitrifying system and nitrogen removal performance. The two reactors were successfully operated for 200 days. The average removal rates of nitrogen and COD of R2 were 81% and 93%, respectively. Besides, the nitrogen removal rate of R1 was 95% under not more than 105 mg/l of COD. The experimental results indicated that the R2 based on nitrate had a good nitrogen removal performance at room temperature (25 degrees C). Additionally, the analysis results of fluorescence in situ hybridization (FISH) showed that the percentage compositions of anammox in R1 and R2 were 84% and 65% on day 189. Finally, the possible nitrogen removal model of anammox-denitrifying system was constructed. According to nitrogen balance and C/N ratios of denitrification, the nitrogen removal approaches of R1 and R2 were obtained. CI - Copyright (c) 2012 Elsevier Ltd. All rights reserved. FAU - Gao, Fan AU - Gao F AD - Key Laboratory of Industrial Ecology and Environmental Engineering, MOE, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China. FAU - Zhang, Hanmin AU - Zhang H FAU - Yang, Fenglin AU - Yang F FAU - Qiang, Hong AU - Qiang H FAU - Zhang, Guangyi AU - Zhang G LA - eng PT - Journal Article DEP - 20120307 PL - England TA - Bioresour Technol JT - Bioresource technology JID - 9889523 RN - 0 (Nitrates) RN - 0 (Nitrites) RN - 0 (Sewage) RN - 7440-44-0 (Carbon) RN - N762921K75 (Nitrogen) SB - IM MH - Bacteria, Anaerobic/*metabolism MH - Bioreactors/*microbiology MH - Carbon/*chemistry MH - Nitrates/isolation & purification/*metabolism MH - Nitrites/isolation & purification/*metabolism MH - Nitrogen/*chemistry MH - Refuse Disposal/*methods MH - Sewage/*microbiology EDAT- 2012/03/27 06:00 MHDA- 2012/08/30 06:00 CRDT- 2012/03/27 06:00 PHST- 2011/10/30 00:00 [received] PHST- 2012/02/25 00:00 [revised] PHST- 2012/02/26 00:00 [accepted] PHST- 2012/03/27 06:00 [entrez] PHST- 2012/03/27 06:00 [pubmed] PHST- 2012/08/30 06:00 [medline] AID - S0960-8524(12)00364-1 [pii] AID - 10.1016/j.biortech.2012.02.113 [doi] PST - ppublish SO - Bioresour Technol. 2012 Jun;114:54-61. doi: 10.1016/j.biortech.2012.02.113. Epub 2012 Mar 7.