期刊
BIORESOURCE TECHNOLOGY
卷 297, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.122467
关键词
Partial-denitrification; Anammox; Granular sludge; Mainstream; Wastewater treatment plants (WWTPs); Biological nitrogen removal
资金
- Key Research and Development Plan of Hainan Province [ZDYF2018241]
- National Natural Science Foundation of China [51868015]
- General Program of Science and Technology Development Project of Beijing Municipal Education Commission [KM201710005001]
- State Key Laboratory of Pollution Control and Resource Reuse Foundation [PCRRF13005]
- Hainan University [KYQD(ZR)1867]
The partial-denitrification/anammox (PDA) process is a promising method to achieve mainstream anammox in wastewater treatment plants (WWTPs). To investigate the feasibility of developing a granule-based process for effective nitrogen removal via PDA, an upflow anaerobic sludge bed reactor was used as a PDA reactor treating low C/N sewage for over 200 days. Granules were formed with an average particle size of 1.92 mm. Metagenomic analysis revealed that the two most abundant genera in granules were Thauera (17.46%) and Candidatus Brocadia (6.24%) which played important roles in achieving partial-denitrification and anammox, respectively. Effective nitrogen removal was achieved with an average effluent TN concentration of 8.74 mg/L when influent TN concentration and COD/TN ratio were 42.56 mg/L and 1.52, respectively. Nitrogen removal via anammox accounted for 90% of dinitrogen production in the PDA reactor. Finally, a granule-based combined process of PDA with nitrification was proposed for achieving anammox in mainstream WWTPs.
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