Zhao Xin, Li Xuejie, Qi Nan, Fu Zhongtian, Chen Meng, Jiang Binhui, Hu Xiaomin
School of Resource & Civil Engineering, Northeastern University, Shenyang 110819, China E-mail:
Water Sci Technol. 2018 Dec;78(9):1852-1860. doi: 10.2166/wst.2018.335.
An anaerobic photosynthetic bacterium, with chemical oxygen demand (COD), ammonia nitrogen (NH-N), total phosphorus (TP) and sulfide (S) simultaneous removal ability, strain SU6, was isolated and identified as belonging to Ectothiorhodospira magna. Its removal efficiencies were simultaneously evaluated in batch culture and influenced in sequencing batch culture. The maximum COD, NH-N, TP and S removal rates of 93.04%, 86.70%, 37.55% and 99.99% were obtained in batch culture with an initial pH 8.0 at 35 °C after 72 h. The simultaneous removal efficiency was enhanced in sequencing batch culture, and 789.27 mg/L COD, 68.91 mg/L NH-N, 70.20 mg/L S and 5.26 mg/L TP were removed by the end of the last cycle within 24 h. This was the first time of reporting contaminants' simultaneous removal by a pure-cultured photosynthetic bacterium. The experimental results demonstrate that E. magna can efficiently serve as a good candidate in anaerobic wastewater contaminants' simultaneous removal, and maybe as another model anaerobic photosynthetic microorganism for water purification investigations.
分离出一株具有同时去除化学需氧量（COD）、氨氮（NH-N）、总磷（TP）和硫化物（S）能力的厌氧光合细菌菌株SU6，并鉴定其属于大外硫红螺菌（Ectothiorhodospira magna）。在分批培养中对其去除效率进行了同步评估，并在序批式培养中对其进行了影响研究。在35℃、初始pH 8.0的分批培养中，72小时后COD、NH-N、TP和S的最大去除率分别达到93.04%、86.70%、37.55%和99.99%。序批式培养提高了同步去除效率，在24小时内的最后一个循环结束时，去除了789.27mg/L的COD、68.91mg/L的NH-N、70.20mg/L的S和5.26mg/L的TP。这是首次报道纯培养光合细菌同时去除污染物。实验结果表明，大外硫红螺菌可有效地作为厌氧废水污染物同步去除的良好候选菌株，也可能成为水净化研究中的另一种模式化厌氧光合微生物。
