期刊
JOURNAL OF WATER PROCESS ENGINEERING
卷 12, 期 -, 页码 105-110出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jwpe.2016.07.002
关键词
Microbial community; Anaerobic ammonium oxidation (ANAMMOX); Sewage; Ambient temperature; Biofilter
资金
- National Natural Science Foundation of China [51408293]
- China Postdoctoral Science Foundation [2014M562114]
- Educational Commission of Hunan Province in China [14B154]
- Research Fund for Doctoral Program of University of South China [2013XQD10]
- Key discipline of Municipal Engineering of Hunan Province
Anaerobic ammonium-oxidizing (anammox) process is considered to be a sustainable option for nitrogen removal. Application of this process, however, is limited by the availability of high strength nitrogen. In this study, an anaerobic ammonium oxidation (ANAMMOX) biofilter to treat sewage was deployed at ambient temperatures (18-21.5 degrees C), and the corresponding microbial community was investigated. The ammonia and nitrite initial loading rates were 0.154 kgN/(m(3) d) and 0.2 kgN/(m(3) d), respectively. ANAMMOX bacteria were rapidly enriched within 25 days and achieved a sustainable increase in the nitrogen removal rate (NRR) for sewage treatment. A final NRR of 0.99 kgN/(m(3) d) was seen at the 80 day point. Observations that combined fluorescence in situ hybridization (FISH) analysis with scanning electron microscopy (SEM) observations confirmed that ANAMMOX bacteria were dominant in the cultivated biofilm, accounting for 39.5 (+/- 1.6)% of total bacteria. Denaturing gradient gel electrophoresis (DGGE) and phylogenetic analysis identified five genera of bacteria: Pseudomonas, Acinetobacter, Nitrosomonas, Candidatus Brocadia fulgida and Ferruginibacter. Of these, Candidatus Brocadia fulgida was the functional ANAMMOX bacteria in the reactor. Candidatus Brocadia fulgida could survive comfortably in sewage, and co-existed with Nitrosomonas and denitrifying bacteria. (C) 2016 Elsevier Ltd. All rights reserved.
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