School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
Bioresour Technol. 2021 Jul;331:125065. doi: 10.1016/j.biortech.2021.125065. Epub 2021 Mar 27.
The co-existence of nitrate, manganese (Mn), and antibiotics are of a wide concern. In this study, a denitrifying and manganese-oxidizing Zoogloea Q7 bacterium was immobilized using polyvinyl alcohol/sodium alginate with sponge cube (PVA/SA@sponge cube) in the reactor. The optimal operation parameters of the bioreactor were explored. Maximum nitrate, Mn(II), and tetracycline (TC) removal efficiencies of 93.00, 72.34, and 57.32% were achieved with HRT of 10 h, pH of 6.5, Mn(II) concentration of 20 mg L, and TC of 1 mg L, respectively. Fluorescence excitation-emission matrix (EEM) proved that the microorganism in the bioreactor was greatly active. Scanning electron microscope (SEM) images demonstrated that Zoogloea Q7 was commendably immobilized on the novel material. X-ray diffraction (XRD) analysis suggested that the bioprecipitate was mainly composed of MnO and MnCO Through high-throughput analysis, Zoogloea sp. Q7 was considered to be the dominant bacteria present in the bioreactor.
硝酸盐、锰 (Mn) 和抗生素共存的问题受到广泛关注。在本研究中，采用聚乙烯醇/海藻酸钠固定化海绵载体（PVA/SA@sponge cube）固定化具有反硝化和锰氧化功能的动胶菌 Q7。对生物反应器的最佳操作参数进行了探索。在水力停留时间为 10 h、pH 值为 6.5、Mn(II)浓度为 20 mg/L 和 TC 浓度为 1 mg/L 的条件下，该生物反应器对硝酸盐、Mn(II)和四环素 (TC) 的去除率分别达到了 93.00%、72.34%和 57.32%。荧光激发-发射矩阵（EEM）表明生物反应器中的微生物具有很高的活性。扫描电子显微镜（SEM）图像表明 Zoogloea Q7 被很好地固定在新型材料上。X 射线衍射（XRD）分析表明生物沉淀主要由 MnO 和 MnCO3 组成。通过高通量分析，认为动胶菌 Q7 是生物反应器中占优势的细菌。
