当前位置: X-MOL 学术Int. Biodeterior. Biodegrad. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The importance of integrated fixed film activated sludge reactor and intermittent aeration in nitritation-anammox systems: Understanding reactor optimization for lagoon supernatant treatment
International Biodeterioration & Biodegradation ( IF 4.8 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.ibiod.2020.104938
Sen Yang , Shengnan Xu , Yun Zhou , Abdul Mohammed , Nicholas J. Ashbolt , Yang Liu

Abstract A single stage nitritation-anammox process was studied in a continuous flow reactor fed with raw lagoon municipal-sludge supernatant containing 835 ± 45 mg N L−1 of NH4+-N in the feed. Reactor operation was divided into five periods for a total of 438 days. Application of intermittent aeration with a 105 min aeration phase followed by a 15 min non-aeration phase reduced the aerobic nitritation rate by 13% but enhanced the anammox activity by 1.9 times. Under the dual effect of IFAS and intermittent aeration, the nitrogen removal rate (NRR) was improved from 0.12 ± 0.012 kg N (m3 d)−1 to 0.28 ± 0.03 kg N (m3 d)−1, representing an increased removal of NH4+ from 56 ± 4.3% to 92.2 ± 2.1%. The evolution of bacterial activity and communities showed that anammox activity significantly improved with the addition of the non-aeration phase, and the AOB population was largely improved with an increase of suspended biomass concentration in the reactor. Microbial community composition through 16S rRNA gene sequencing analysis showed that Nitrosomonas was the predominant AOB in the flocs phase, while Candidatus Brocadia was the dominant anammox bacteria in the biofilm phase.

中文翻译:

集成固定膜活性污泥反应器和间歇曝气在亚硝化-厌氧氨氧化系统中的重要性:了解泻湖上清液处理的反应器优化

摘要 在连续流动反应器中研究了单级亚硝化-厌氧氨氧化工艺,该反应器用原料泻湖市政污泥上清液进料,进料中含有 835 ± 45 mg NL-1 的 NH4+-N。反应堆运行分为五个阶段,共计 438 天。应用间歇曝气,105 分钟曝气阶段,然后是 15 分钟非曝气阶段,将好氧亚硝化率降低了 13%,但将厌氧氨氧化活性提高了 1.9 倍。在IFAS和间歇曝气的双重作用下,氮去除率(NRR)从0.12±0.012 kg N(m3 d)-1提高到0.28±0.03 kg N(m3 d)-1,代表NH4+的去除增加从 56 ± 4.3% 到 92.2 ± 2.1%。细菌活性和群落的演变表明,随着非曝气阶段的加入,厌氧氨氧化活性显着提高,并且随着反应器中悬浮生物量浓度的增加,AOB种群得到了很大的改善。通过16S rRNA基因测序分析微生物群落组成表明,在絮凝期以亚硝化单胞菌为优势的AOB,而在生物膜期以Candidatus Brocadia为优势的厌氧氨氧化菌。
更新日期:2020-04-01
down
wechat
bug