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Indexed by:期刊论文

Date of Publication:2012-06-01

Journal:BIORESOURCE TECHNOLOGY

Included Journals:SCIE、EI、PubMed、Scopus

Volume:114

Page Number:54-61

ISSN No.:0960-8524

Key Words:Anammox-denitrifying system; Nitrite; Nitrate; Temperature; Nitrogen removal approaches

Abstract: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 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. (C) 2012 Elsevier Ltd. All rights reserved.