Achieving partial denitrification-anammox in biofilter for advanced wastewater treatment

被引：82
作者：
Cui, Bin [1 ]
Yang, Qing [1 ]
Liu, Xiuhong [1 ]
Wu, Wenjun [1 ]
Liu, Zhibin [1 ]
Gu, Pengchao [2 ]
机构：
[1] Beijing Univ Technol, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing 100124, Peoples R China
[2] Beijing Drainage Grp Co Ltd BDG, Beijing 100022, Peoples R China
来源：
ENVIRONMENT INTERNATIONAL | 2020年 / 138卷 / 138期
关键词：
Partial denitrification; Anammox; Microbial community structure; Functional gene; Nitrite accumulation; TERTIARY NITROGEN REMOVAL; ORGANIC-CARBON; (PD)-ANAMMOX PROCESS; NITRITE PRODUCTION; GRANULAR SLUDGE; NITRATE; PERFORMANCE; PATHWAYS; BACTERIA; GROWTH;
D O I：
10.1016/j.envint.2020.105612
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Recently, partial denitrification (PDN) - anaerobic ammonium oxidation (anammox) process has been widely studied in activated sludge for nitrate wastewater treatment. However, achieving PDN-Anammox in biofilter for domestic wastewater treatment was never reported. In this study, two lab-scale PDN biofilter and Anammox biofilter were built up to treat simulated domestic wastewater. The results showed that stable nitrogen removal performance was kept with averaged effluent nitrogen of 10.2 mg/L. Stable nitrite accumulation performance was achieved with low abundance of nitrite reductase gene, while influent composition influenced nitrogen transformation pathway in PDN biofilter. When treating domestic wastewater, nitrification and partial denitrification led to the higher nitrite accumulation ratio of 75.4%. The percentage contribution of anammox biofilter was 74.6% for nitrogen removal, and Candidatus Brocadia was dominant genus. After long-term operation, limited substrate concentration caused interspecific competition among various anammox bacteria, leading to an increasing proportion of Candidatus Brocadia fulgida. PDN-Anammox biofilter is a feasible process to advanced wastewater treatment, which could save aeration consumption and carbon source addition, and reduce sludge production.
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页数：9
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