Enhancement of simultaneous algicidal and denitrification of immobilized Acinetobacter sp. J25 with magnetic Fe3O4 nanoparticles

Su, Jun feng; Liang, Dong hui; Huang, Ting lin; Wei, Li; Ma, Min; Lu, Jinsuo

Enhancement of simultaneous algicidal and denitrification of immobilized Acinetobacter sp. J25 with magnetic Fe3O4 nanoparticles

2017

In this study, immobilization technique was employed to improve simultaneous algicidal and denitrification of immobilized Acinetobacter sp. J25 with magnetic Fe₃O₄ in eutrophic landscape water. After 7 days of operation, the maximum superoxide dismutase (SOD) activity (54.43 U mg⁻¹), nitrate removal efficiency (100% (0.2127 mg L⁻¹ h⁻¹)), and chlorophyll-a removal efficiency (89.71%) were obtained from the immobilized J25 with magnetic Fe₃O₄. The results suggest that immobilized J25 with magnetic Fe₃O₄ had better nitrogen removal efficiency and algicidal activity in eutrophic landscape water. High-throughput sequencing data profiled the strain J25 that was immobilized with magnetic Fe₃O₄ which changed the composition of the microbial community. The results indicated a novel concept of enhancing the algicidal and denitrification property of immobilized bacteria with magnetic Fe₃O₄ in eutrophic landscape water.

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