4.4 Article

Microbial activity along the depth of biofilm in the simultaneous partial nitrification, anammox and denitrification (SNAD) system

期刊

ENVIRONMENTAL TECHNOLOGY
卷 -, 期 -, 页码 -

出版社

TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2022.2128889

关键词

Anammox; SNAD; microbial community; microelectrode; organic carbon

资金

  1. Natural Science Foundationof Chongqing [cstc2019jcyj-msxmX0562, cstc2018jszxzdyfxmX0001]
  2. Scientific Research Project of Chongqing Ecology Environment Bureau [2019-91]
  3. Science and Technology Research Program of Chongqing Municipal Education Commission [KJQN202001515]
  4. Provincial and Ministerial Co-constructive of Collaborative Innovation Center for MSW Comprehensive Utilization [shljzyh2021-09, shljzyh2021-22]

向作者/读者索取更多资源

This study evaluated the influence of organic carbon on the microenvironment and microbial growth in the SNAD biofilm system. The results showed that the ORP distribution of the SNAD system was positively correlated with anammox activity and had an impact on microbial community structure. The synergistic effect of anammox bacteria and denitrifiers could be achieved when the abundance ratio of anammox bacteria to denitrifying bacteria is greater than 1.2.
Simultaneous partial nitrification, anammox and denitrification (SNAD) is a sustainable and cost-effective technology for nitrogen removal from low-strength wastewater. However, knowledge of the biofilm microenvironment of the SNAD system is currently unsatisfactory. The purpose of this study was to evaluate organic carbon effects on the microenvironment and microbial growth in the SNAD biofilm system. Microelectrodes were used to investigate microbial activity in-depth within biofilms. ORP distribution of the SNAD system was positively related to anammox activity(R-2 = 0.9), and had some influence on microbial community structure. The synergistic effect of anammox bacteria and denitrifiers could be achieved when the abundance ratio of anammox bacteria to denitrifying bacteria is greater than 1.2.

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