Metal-organic framework-derived porous metal oxide/graphene nanocomposites as effective adsorbents for mitigating ammonia nitrogen inhibition in high concentration anaerobic digestion of rural organic waste
文献类型： 外文期刊
作者： Jia, Zhaoyan 1 ; Ye, Xiaomei 1 ; Liu, Yang 1 ; Wang, Chengcheng 1 ; Cao, Chunhui 1 ; Du, Jing 1 ; Kong, Xiangping 1 ; Chen, Zhongbing 4 ; Xi, Yonglan 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Nanjing 210014, Peoples R China
2.Minist Agr & Rural Affairs, Jiangsu Collaborat Innovat Ctr Solid Organ Waste R, Key Lab Crop & Livestock Integrat, East China Sci Observing & Expt Stn Dev & Utilizat, Nanjing 210014, Peoples R China
3.Jiangsu Univ, Sch Agr Engn, Zhenjiang 212013, Peoples R China
4.Czech Univ Life Sci Prague, Fac Environm Sci, Dept Appl Ecol, Kamycka 129, Prague 16521, Czech Republic
关键词： Anaerobic digestion; Ammonia nitrogen inhibition; Metal -organic frameworks; Ammonia nitrogen adsorption
期刊名称：FUEL （ 影响因子：8.035； 五年影响因子：7.621 ）
ISSN： 0016-2361
年卷期： 2023 年 332 卷
页码：
收录情况： SCI
摘要： Anaerobic digestion (AD) is an efficient technology that can efficiently convert organic waste into biofuel, but excessive ammonia nitrogen concentration will lead to failure of AD. In this study, a metal-organic framework (MOF)-derived porous metal oxide/graphene nanocomposite (FeMn-MOF/G) was first applied in AD to inves-tigate the mitigation effect of ammonia nitrogen inhibition. Five total solids (TS) concentrations of 8 %, 10 %, 12 %, 15 % and 20 % were set up for AD experiment to investigate the effect of FeMn-MOF/G on AD. The results showed that the average ammonia nitrogen adsorption capacity of FeMn-MOF/G in AD with different TS con-centrations was 102.68 mg/g, and the ammonia nitrogen adsorption effect decreased with the increase of TS. When FeMn-MOF/G was added to AD, the ammonia nitrogen concentration of the experimental group could be reduced to 2,086.00 mg/L, and the VFAs concentration was reduced to 1,510.34 mg/L. The methane production in each experimental group increased significantly, and the experimental group MOF-8 obtained the highest cumulative methane production of 321.35 mL/gVS, indicating that FeMn-MOF/G effectively mitigated the ammonia nitrogen inhibition,which promoteed the successful operation of AD. We characterized the prepared FeMn-MOF/G. The results of the vibrating sample magnetometer show that FeMn-MOF/G has excellent super -paramagnetic properties. Magnetic recycling is a promising method for the recycling of FeMn-MOF/G materials, which provides a broad prospect for the application of FeMn-MOF/G in AD.
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