Role of biomass-derived carbon-based composite accelerants in enhanced anaerobic digestion: Focusing on biogas yield, fertilizer utilization, and density functional theory calculations

被引：76

作者：

Chen, Jiageng ^{[1
]}

Yun, Sining ^{[1
]}

Shi, Jing ^{[1
]}

Wang, Ziqi ^{[1
]}

Abbas, Yasir ^{[1
]}

Wang, Kaijun ^{[1
]}

Han, Feng ^{[1
]}

Jia, Bo ^{[1
]}

Xu, Hongfei ^{[1
]}

Xing, Tian ^{[1
]}

Li, Bingjie ^{[1
]}

机构：

[1] Xian Univ Architecture & Technol, Sch Mat Sci & Engn, Funct Mat Lab FML, Xian 710055, Shaanxi, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2020年 / 307卷

关键词：

Anaerobic digestion; Composite accelerants; Biogas yield; Fertilizer utilization; First-principle calculations; INTERSPECIES ELECTRON-TRANSFER; GENERATION INTEGRATED DEVICES; COUNTER ELECTRODES; METHANOGENIC PROPIONATE; METHANE PRODUCTION; DAIRY MANURE; CO-DIGESTION; WASTE; NANOPARTICLES; DEGRADATION;

D O I：

10.1016/j.biortech.2020.123204

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The performance of anaerobic digestion (AD) can be improved by the addition of accelerants. Three types of biomass-derived carbon-based composites (Co/C, CoO/C, and Co3O4/C) were used as accelerants to investigate the effect on AD systems in this work. These accelerants significantly improved the cumulative biogas yield (576585 mL/g VS), and the total chemical oxygen demand degradation rate (68.48-71.11%) compared to the reference group (435.8 mL/g VS, 50.74%). The digestates with accelerants exhibited exceptional stability (59.24-63.67%) and superior fertilizer utilization (3.50-4.55%). In addition, first-principle density functional theory (DFT) calculations were conducted to provide the theoretical basis for the direct interspecies electron transfer (DIET), and a general strategy was proposed to help understand the enhanced methanogenesis pathway induced by the biomass-derived carbon-based composites. These important findings provide a novel avenue for the development of composite accelerants for AD systems.

引用

页数：11