Guangdong Province Engineering Research Center for Urban Water Recycling and Environmental Safety, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
Research Centre for Environmental Quality Management, Kyoto University, 1-2 Yumihama, Otsu, Shiga 520-0811, Japan.
J Hazard Mater. 2018 Sep 5;357:226-234. doi: 10.1016/j.jhazmat.2018.06.005. Epub 2018 Jun 2.
Effect of dosing ferroferric oxide (FeO) on the anaerobic treatment of azo dye Reactive Red 2 (RR2) was investigated in two anaerobic sequencing batch reactors (ASBRs). System performance, dye degradation pathways, and microbial activities and structure were examined. The addition of FeO significantly improved treatment efficiency, with the removal efficiency of RR2 increased by 116%, the maximum methane (CH) yield potential and the peak CH production rate improved by 7.7% and 22.3%, and the lag phase shortened by 39.6%, respectively. The activity of the electron transport system was significantly enhanced by dosing FeO, with the maximum value increased by 77% and conductivity of the anaerobic sludge increased by 178%. According to the proposed pathway for the degradation of RR2, the degradation products from complete cleavage of the NN bond in RR2 were obtained at the presence of FeO, while were absent without FeO. At high initial dye concentrations, the dosage of FeO alleviated the inhibition to microbes by RR2, and high degradation rate and removal efficiency were maintained. The microbial community structure changed during the long-term acclimation with the dosage of FeO. Paludibacter, Trichococcus and Methanosarcina were predominant and their relative abundances increased with the addition of FeO.
在两个厌氧序批式反应器（ASBR）中研究了铁酸亚铁（FeO）投加量对偶氮染料活性红 2（RR2）厌氧处理的影响。考察了系统性能、染料降解途径以及微生物活性和结构。FeO 的添加显著提高了处理效率，RR2 的去除效率提高了 116%，最大甲烷（CH）产率潜力和 CH 最大产率分别提高了 7.7%和 22.3%，滞后期缩短了 39.6%。FeO 的投加显著增强了电子传递系统的活性，最大值增加了 77%，厌氧污泥的电导率增加了 178%。根据 RR2 完全裂解 NN 键的提出的降解途径，在有 FeO 的情况下获得了 RR2 的 NN 键完全裂解的降解产物，而没有 FeO 则没有。在高初始染料浓度下，FeO 的投加缓解了 RR2 对微生物的抑制作用，保持了较高的降解速率和去除效率。微生物群落结构在长期驯化过程中发生了变化，FeO 的投加增加了 Paludibacter、Trichococcus 和 Methanosarcina 的相对丰度。
