LIGuang-lei,LIJun.Manganese Oxide Mediated Autotrophic Denitrification：Startup，Efficiency and Mechanisms[J].China Water & Wastewater,2024,40(19):16-24.
Manganese Oxide Mediated Autotrophic Denitrification：Startup，Efficiency and Mechanisms
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第19期
Page:
16-24
Column:
Date of publication:
2024-10-01
- Abstract:
- Manganese oxide mediated autotrophic denitrification is a promising method for treating ammonia wastewater under anaerobic conditions. The anaerobic reactor was activated by adjusting pH, adding trace elements (EDTA and Fe2+), and reducing ammonia nitrogen load. The manganese oxide mediated autotrophic denitrification process and the role of microorganisms was analyzed. It was found that the ammonia nitrogen removal load (ARR) and total nitrogen removal load (NRR) of the reactor were (0.031 ± 0.009) kg/(m3·d) and (0.025 ± 0.010) kg/(m3·d) respectively after successful startup, and the addition of EDTA and Fe2+ promoted the conversion of ammonia nitrogen. As the granular sludge formed, manganese oxides gradually transform from Mn (Ⅳ) to Mn (Ⅱ), and then formed complex biological manganese oxides through the manganese autotrophic denitrification process (NDMO). There were various bacterial communities in the reactor, including manganese redox bacteria such as Acinetobacter, Bacillus, Anaeromyxobacter and Geothrix, Anammox bacteria（Candidatus_Brocadia）, and the nitrification denitrification microbial communities Ellin6067, Nitrospira, norank_f__ PHOS?HE36, Nitrosomonas and Denitratisoma. Manganese oxide enriches the diversity of microorganisms and generates multiple denitrification pathways.
Last Update:
2024-10-01