Identification of novel strain Acinetobacter baumannii H1 and its improvement capacity for nutrient removal after coimmobilized on activated carbon and CaCO3 in real aquaculture wastewater

文献类型： 外文期刊

第一作者： Ma, Yonghao

作者： Ma, Yonghao;Shu, Hu;Zhou, Jiayi;Liu, Yuting;Lai, Xunheng;Lin, Junduo;Yue, Sha;Ma, Yonghao;Lu, Huijie;Zhao, Jichen;Liu, Fengkun;Guo, Qiang;Huang, Wen;Ma, Yonghao

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关键词： Bacterial immobilization; Aerobic nitrogen and phosphate removal; Wastewater treatment; Bacterial community

期刊名称：ENVIRONMENTAL RESEARCH （ 影响因子：7.7； 五年影响因子：7.7 ）

ISSN： 0013-9351

年卷期： 2025 年 279 卷

页码：

收录情况： SCI

摘要： A new strain H1, Acinetobacter baumannii, exhibited the 96 % nitrogen and 76 % phosphate removal efficiencies in suspension environment after 48 h, and the optimal conditions were obtained at pH of 7-8, temperature of 30 degrees C, carbon source of succinate, carbon-nitrogen ratio of 10 and phosphorus-nitrogen ratio of 0.2, respectively. The immobilization experiments with activated carbon and CaCO3 were carried out, the optimal formula was 30 g/L CaCO3, 15 g/L activated carbon-bacteria complex, 2 % CaCl2 and a 1:1 embedding agent ratio. The removal efficiency of NH4+-N, total nitrogen, total phosphorus and chemical oxygen demand in immobilized H1 was 288.89 %, 121.87 %, 135.69 % and 667.21 % higher than that by free strain in group With Indigenous Bacteria, respectively. Under the real water environment, the nitrogen concentrations in the immobilization groups were 3-4 times lower than those of the suspension groups, and the abundances of N and P metabolism-associated bacterial communities (Proteobacteria and Patescibacteria) were higher in the immobilization groups. These results provided an approach for the practical application in aquaculture tailwater treatment.

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