Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China.
Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China.
Bioresour Technol. 2019 Nov;291:121874. doi: 10.1016/j.biortech.2019.121874. Epub 2019 Jul 24.
Anaerobic digestion is widely employed for treating phenol-containing wastewater, but there are still some drawbacks such as slow phenol degradation rate and vulnerable acetoclastic methanogens. Coupling of magnetite (FeO) and zero valent iron (ZVI) was firstly used to enhance anaerobic digestion of phenol. The results indicated an obvious synergistic effect was generated with coupling of FeO and ZVI during the whole anaerobic digestion of phenol. The phenol degradation rate and methane production of FeO/ZVI-added group were increased by 8.8-23.1% and 11.9-31.6%, respectively compared with FeO-added group, and enhanced by 5.9-17.1% and 4.4-18.3%, respectively compared with ZVI-added group. ZVI improved the growth of hydrogenotrophic methanogens and FeO enhanced the growth of syntrophic acetate-oxidizing bacteria. Finally, the syntrophic interaction between acetate-oxidizing bacterium and hydrogenotrophic methanogens played a vital role on the synergistic effect of FeO and ZVI on the whole anaerobic phenol digestion.
厌氧消化广泛应用于处理含酚废水，但仍存在一些缺点，如苯酚降解速率慢和乙酸营养型产甲烷菌易受影响。首次将磁铁矿（FeO）和零价铁（ZVI）耦合用于强化苯酚的厌氧消化。结果表明，在整个苯酚厌氧消化过程中，FeO 和 ZVI 的耦合产生了明显的协同作用。与仅添加 FeO 的组相比，添加 FeO/ZVI 的组的苯酚降解率和甲烷产量分别提高了 8.8-23.1%和 11.9-31.6%，与仅添加 ZVI 的组相比，分别提高了 5.9-17.1%和 4.4-18.3%。ZVI 促进了氢营养型产甲烷菌的生长，而 FeO 促进了产乙酸菌的生长。最后，乙酸氧化菌和氢营养型产甲烷菌之间的共营养相互作用对 FeO 和 ZVI 对整个厌氧苯酚消化的协同作用起着至关重要的作用。
