中文关键词厌氧氨氧化(ANAMMOX)硝酸盐零价铁(Fe⁰)自养反硝化钝化 英文关键词anaerobic ammonia oxidation (ANAMMOX)nitratezero-valent iron (Fe⁰)autotrophic denitrificationpassivation

作者	单位	E-mail
张文静	城市生活污水资源化利用技术国家地方联合工程实验室, 苏州 215009 苏州科技大学环境科学与工程学院, 苏州 215009 苏州科技大学环境生物技术研究所, 苏州 215009	807687815@qq.com
黄勇	城市生活污水资源化利用技术国家地方联合工程实验室, 苏州 215009 苏州科技大学环境科学与工程学院, 苏州 215009 苏州科技大学环境生物技术研究所, 苏州 215009
毕贞	城市生活污水资源化利用技术国家地方联合工程实验室, 苏州 215009 苏州科技大学环境科学与工程学院, 苏州 215009 苏州科技大学环境生物技术研究所, 苏州 215009	bzhen.xi@163.com
胡羽婷	苏州科技大学环境科学与工程学院, 苏州 215009 苏州科技大学环境生物技术研究所, 苏州 215009
董石语	苏州科技大学环境科学与工程学院, 苏州 215009 苏州科技大学环境生物技术研究所, 苏州 215009

中文摘要 在非严格厌氧的连续流反应器中，通过调节进水pH、外加一定浓度的Fe²⁺以及定期更换新鲜铁粉这3种运行方式探讨维持厌氧氨氧化（ANAMMOX）菌利用零价铁去除硝酸盐反应体系长期稳定运行的适宜条件.结果表明，随着反应进行、受零价铁表面钝化的影响，该体系硝酸盐去除率逐渐下降，反应器难以持续运行.在一定范围内降低进水pH （5~7），或者额外投加一定量的Fe²⁺对改善该反应体系的稳定性效果不显著.通过定期更换新鲜铁粉的方式，可以有效提高硝酸盐去除率、增强反应器稳定性.相比对照组可稳定运行7 d，实验组可至少稳定运行60 d，硝酸盐平均去除率提高22.23%.因此，采取适宜措施保证体系内有足够具有活性的零价铁、消除零价铁钝化的不利影响，是ANAMMOX菌利用零价铁去除硝酸盐反应体系高效、稳定运行的关键. 英文摘要 Fe⁰-dependent autotrophic denitrification mediated by anaerobic ammonia oxidation (ANAMMOX) bacteria was carried out in continuous flow reactors under non-strict anaerobic conditions. Three strategies, including adjusting the influent pH, adding Fe²⁺, and regular renewal with fresh iron powder, were used to investigate the appropriate conditions to maintain the long-term stability of this process. The results showed that the nitrate removal efficiency declined due to Fe⁰ passivation over time, and this ultimately led to the reaction becoming unsustainable. Neither reducing the influent pH (within the pH range 5-7) nor adding a quantity of Fe²⁺ had an obvious effects on the sustainability of this process. Instead, the nitrate removal efficiency and the sustainability of the reactor was enhanced significantly by regular renewal with fresh Fe⁰ powder. Compared with the control group (with a 7-day stable operation), the experimental setup was run steadily for at least 60 days, and the average nitrate removal efficiency was increased by 22.23%. Consequently, maintaining an adequate amount of activated Fe⁰ and eliminating the adverse effects of Fe⁰ passivation are vital for the sustainable operation of Fe⁰-dependent autotrophic denitrification as mediated by ANAMMOX bacteria.

PDF全文下载地址:

https://www.hjkx.ac.cn/hjkx/ch/reader/create_pdf.aspx?file_no=20190728&flag=1&journal_id=hjkx&year_id=2019