Абстрактный

Effect of Oxygen Content on NO Removal and Microbial Communities of a Hybrid Catalytic Membrane Biofilm Reactor

Z.S. Wei, J.L. Pei, Z.S. Huang, X.L. Xiao, M.R. Tang, B.L Li, X. Zhang

The effect of oxygen content on NO removal and microbial communities of a hybrid catalytic membrane biofilm reactor (HCMBR) has been investigated. NO removal efficiency reached 84.8%, 85.1%, 94% and 94.5% at oxygen content of 2%, 6%, 10% and 17% in flue gas (H₂, H₆, H₁₀ and H₁₇), respectively. NO removal increased with increasing oxygen content.

Denitrification was dominant in H₂, H₆; simultaneous nitrification and denitrification occurred in H₁₀, H₁₇. Oxygen content influenced the microbial community in HCMBR as shown by 16S rDNA, metagenomics sequencing method. The dominant phylum was Fluviicola, Arcobacter, Brachymonasin H₂, H₆, H₁₀, while Brachymonas, denitrificans, vadinCA02 in H₁₇. Fluviicola, Acrobacter, Brachymonas and Brachymonas were dominant denitrifiers in H₂, H₆, H₁₀ and H₁₇, respectively. Primary coordinate analysis (PcoA) indicated phylogenic structures in H₁₀ and H₁₇ were highly alike but dissimilar to those in H₂ and H₆. Canonical correlation analysis (CCA) classified visualized oxygen content dependence distinction of bacterial genera.