Characterization of simultaneous ammonium and nitrate removal and microbial communities in airlift reactor using 3-hydroxybutyrate-co-3-hy-droxyvalerate (PHBV) as carbon source and biofilm carrier

文献类型： 外文期刊

第一作者： Li, Junchi

作者： Li, Junchi;Hu, Yiming;Ruan, Yunjie;Li, Junchi;Hu, Yiming;Chen, Guangsuo;Ruan, Yunjie;Zhang, Fan;Ma, Bin;Kong, Dedong

作者机构：

关键词： SND (simultaneous nitrification and; denitrification); Salinity; Particle size distribution; Microbial community; RAS effluent treatment

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.4； 五年影响因子：10.6 ）

ISSN： 0960-8524

年卷期： 2024 年 393 卷

页码：

收录情况： SCI

摘要： As a novel trend, solid carbon sources are applied to act as electron donors and biofilm carrier in biological denitrification process. In this study, simultaneous nitrate and ammonium removal process in an airlift sequencing batch reactor using 3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV) as carbon source and biofilm carrier under intermittent aeration conditions was established to treat effluent of synthetic marine recirculating aquaculture system. The results showed that maximum nitrate and ammonia nitrogen removal rates of 0.45 and 0.09 kg m- 3 d-1 were achieved. No significant nitrite accumulation was found during 200-day operation, while effluent dissolved organic carbon accumulation and particle size reduction significantly increased. Microbial community analysis and batch tests illuminate that the generated sludge and attached biofilm played important roles in nitrogen removal. This study demonstrates the potential mechanism for the nitrogen removal process mediated by 3-hydroxybutyrateco-3-hydroxyvalerate and provide a new idea for the alternative solutions of solid carbon sources.

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