Autotrophic denitrification by nitrate-dependent Fe(II) oxidation in a continuous up-flow biofilter
Autotrophic denitrification by nitrate-dependent Fe(II) oxidation in a continuous up-flow biofilter
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DOI：
10.1007/s00449-015-1511-7
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发表时间：
2016-02
影响因子：
3.8
通讯作者：
Jun Zhou;Hongyu Wang;Kai Yang;Bin Ji;Dan Chen;Huining Zhang;Yuchong Sun;Jun Tian
中科院分区：
文献类型：
--
作者：
Jun Zhou;Hongyu Wang;Kai Yang;Bin Ji;Dan Chen;Huining Zhang;Yuchong Sun;Jun Tian
以海绵铁为填料，构建了一个连续升流式生物滤池，在厌氧条件下对硝酸盐进行了去除。将硝酸盐还原和Fe（II）氧化菌株W5作为接种物添加到生物过滤器中。当NO3−-N浓度为30 mg/L，Fe 2+浓度为800 mg/L时，效果最好。进水中的亚硝酸盐会抑制硝酸盐的去除，而Fe 2+会导致结垢。Fe（II）EDTA能有效防止细胞结垢，当Fe（II）EDTA浓度为1100 mg/L时，脱氮率最高可达90%左右。硝酸盐还原遵循一级反应动力学。用X射线荧光光谱分析了生物膜的特性。
A continuous-upflow biofilter packed with sponge iron was constructed for nitrate removal under an anaerobic atmosphere.Microbacteriumsp. W5, a nitrate reducing and Fe(II) oxidizing strain, was added to the biofilter as an inoculum. The best results were achieved when NO3−-N concentration was 30 mg/L and Fe2+was 800 mg/L. Nitrite in influent would inhibit nitrate removal and aqueous Fe2+resulted in encrustation. Fe(II)EDTA would prevent cells from encrustation and the maximum nitrogen removal efficiency was about 90 % with Fe(II)EDTA level of 1100 mg/L. Nitrate reduction followed first-order reaction kinetics. Characteristics of biofilms were analyzed by X-ray fluorescence spectroscopy.