期刊
BIORESOURCE TECHNOLOGY
卷 247, 期 -, 页码 259-266出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.09.070
关键词
Anammox; Non-woven fabric; Substrate removal model; Microbial community dynamics; High-throughput sequence
资金
- National Natural Science Foundation of China [21477063, 21777086]
- National Key Research and Development Program of China [2017YFF0206702]
- Taishan Scholar Program [ts201511003]
- Key R & D project of Shandong Province [2016GSF117032]
- Young Scholars Program of Shandong University [2016WLJH16]
- Fundamental Research Funds of Shandong University [2016JC031]
- Jinan Science and Technology Project [201401364]
- Shenzhen Science and Technology Research and Development Funds [JCYJ20170307092918052]
Membrane bioreactor with non-woven fabric membranes (NWMBR) is developing into a suitable method for anaerobic ammonium oxidation (anammox). As a carrier, non-woven fabric membrane divided total biomass into biofilm and suspended flocs gradually. Total nitrogen removal efficiency was maintained around 82.6% under nitrogen loading rate of 567.4 mg N/L/d after 260 days operation. Second-order substrate removal and Stover-Kincannon models were successfully used to simulate the nitrogen removal performance in NWMBR. High-throughput sequence was employed to elucidate the underlying microbial community dynamics. Candidatus Brocadia, Kuenenia, Jettenia were detected to affirm the dominant status of anammox microorganisms and 98.2% of anammox microorganisms distributed in biofilm. In addition, abundances of functional genes (hzs, nirK) in biofilm and suspended flocs were assessed by quantitative PCR to further investigate the coexistence of anammox and other microorganisms. Potential nitrogen removal pathways were established according to relevant nitrogen removal performance and microbial community.
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