Xu Jin-Lan, Chen Zi-Wei, Zhang Shao-Feng, Wei Yi-Ni
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 710055, China.
Huan Jing Ke Xue. 2019 Sep 8;40(9):4177-4184. doi: 10.13227/j.hjkx.201903012.
The effects of combined with signal molecules on the removal of sulfide and nitrate was investigated. By adding signal molecules and at the same, the total number of microorganisms increased, the removal of sulfide and nitrate was accelerated, and an increase in nitrogen gas and more stable accumulation of elemental sulfur was observed. The total number of microorganisms after the reaction was detected using fluorescence hybridization (FISH) technique. In this experiment, the optimal concentration for the stable accumulation of elemental sulfur from six concentrations of signal molecules was revealed. Further, the effects of adding signal molecules, , and their combination were analyzed at this concentration. The results showed that it was easier to accumulate elemental sulfur after the addition of 1.0 μmol·L signal molecule. After adding both and 1.0 μmol·L signal molecules at a sulfide concentration of 200 mg·L, the removal of sulfide and nitrate increased to 99.8% and 96.9% at 72 h, respectively, and increases in nitrogen gas and sulfur were observed. The amounts of elemental sulfur and nitrogen gas reached to 59.0 mg and 80.0 mL, respectively, after adding 2.5 μmol·L signal molecules at 72 h when the sulfide concentration was 300 mg·L. Under those conditions, the removal efficiency of sulfide and nitrate reached 99.0% and 93.9%, and the production of elemental sulfur and nitrogen reached 63.1 mg and 79.5 mL, respectively.
研究了信号分子组合对硫化物和硝酸盐去除的影响。通过添加信号分子，同时微生物总数增加，硫化物和硝酸盐的去除加速，观察到氮气增加以及元素硫更稳定的积累。使用荧光原位杂交（FISH）技术检测反应后微生物的总数。在本实验中，揭示了六种信号分子浓度下元素硫稳定积累的最佳浓度。此外，在此浓度下分析了添加信号分子、以及它们组合的影响。结果表明，添加1.0 μmol·L信号分子后更容易积累元素硫。在硫化物浓度为200 mg·L时同时添加和1.0 μmol·L信号分子，72 h时硫化物和硝酸盐的去除率分别提高到99.8%和96.9%，并观察到氮气和硫的增加。当硫化物浓度为300 mg·L时，在72 h添加2.5 μmol·L信号分子后，元素硫和氮气的量分别达到59.0 mg和80.0 mL。在这些条件下，硫化物和硝酸盐的去除效率分别达到99.0%和93.9%，元素硫和氮气的产量分别达到63.1 mg和79.5 mL。
