Rapid anaerobic culture and reaction kinetic study of anammox bacteria on microfluidic chip

Li, B., Mao, S., Zhang, C., Xu, T., Ma, X., Lin, H., Yin, H. and Qiu, Y. (2024) Rapid anaerobic culture and reaction kinetic study of anammox bacteria on microfluidic chip. Bioresource Technology, 396, 130422. (doi: 10.1016/j.biortech.2024.130422) (PMID:38320714)

Abstract

Anammox bacteria are being increasingly investigated as part of an emerging nitrogen removal technology. However, due to the difficulty in culturing, current understanding of their behavior is limited. In this study, anaerobic microfluidic chips were used to study anammox bacteria, showing great advantages over reactors. On-chip fluorescence in situ hybridization (FISH) showed the relative abundance of free form anammox bacteria increased by 56.1 % after one week’s culture, an increase that is three times higher than that of bioreactor (17.1 %). For granular form cultures, the nitrogen removal load reached 2.34 ∼ 2.51 kg-N/(m3·d), which was also substantially higher than the bioreactor (∼1.22 kg-N/(m3·d)). Furthermore, studying the kinetics of nitrite inhibition of granular sludge with different particle sizes (100–900 μm) showed that the maximum ammonia load and the nitrite semi-saturation coefficient noticeably decreased for smaller particle sizes. These results illustrate the usefulness of the microfluidic method for in-depth understanding anammox process and its implementation.

• Item Type: Articles
• Additional Information: This work was supported by the National Key Research and Development Program of China (2022YFC32031-04) and Foreign Experts Program of China (G2022105014L).
• Keywords: Anammox, microfluidic chip, kinetics, nitrite inhibition, granular sludge.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Yin, Professor Huabing

Creator Roles

Yin, H.: Conceptualization, Resources, Validation, Writing – review and editing

• Authors: Li, B., Mao, S., Zhang, C., Xu, T., Ma, X., Lin, H., Yin, H., and Qiu, Y.
• College/School: College of Science and Engineering > School of Engineering > Biomedical Engineering
• Journal Name: Bioresource Technology
• Publisher: Elsevier
• ISSN: 0960-8524
• ISSN (Online): 1873-2976
• Published Online: 05 February 2024