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[Nitrification performance and microbial community analysis in carbon membrane-aerated biofilm reactor].
- Source :
-
Huan jing ke xue= Huanjing kexue [Huan Jing Ke Xue] 2007 Sep; Vol. 28 (9), pp. 2123-8. - Publication Year :
- 2007
-
Abstract
- A carbon membrane-aerated biofilm reactor was developed to treat nitrogenous inorganic wastewater. Influent NH; -N concentrations and HRT were changed to investigate nitrification performance of reactor,oxygen utilization and NH4+ -N's removal loading. Biofilm's surface characteristics and dominant bacteria of nitrifier were analyzed. The results show that under the conditions of intra-membrane pressure of 0.017 MPa, influent NH4+ -N of 50 mg/L and HRT of 8 h NH4+ -N removal efficiency reaches 96% and effluent average nitrite is 17 mg/L, which benefits short-cut nitrification to a certain extent. The bacteria within biofilm consume all oxygen supplied through carbon membrane. The maximum specific removal rate of NH4+ -N is 9.7 g/(m2 x d), which is limited by the amount of bacteria grown onto carbon membrane's surface. Fluorescent in situ hybridization analysis indicates that within the biofilm Nitrosomonas and Nitrosospira are main ammonia-oxidizing bacteria and occupy about 19% and 21% of the total bacteria number, respectively. The Nitrobacter are not observed and Nitrospira are dominant nitrite-oxidizing bacteria, the fraction of which is 20% of total bacteria.
- Subjects :
- Ammonia chemistry
Nitrites chemistry
Nitrosomonadaceae classification
Nitrosomonadaceae metabolism
Nitrosomonas metabolism
Nitrosomonas physiology
Population Dynamics
Waste Disposal, Fluid methods
Biofilms
Bioreactors microbiology
Carbon chemistry
Nitrogen chemistry
Nitrosomonadaceae physiology
Subjects
Details
- Language :
- Chinese
- ISSN :
- 0250-3301
- Volume :
- 28
- Issue :
- 9
- Database :
- MEDLINE
- Journal :
- Huan jing ke xue= Huanjing kexue
- Publication Type :
- Academic Journal
- Accession number :
- 17990569