Enhanced direct interspecies electron transfer with transition metal oxide accelerants in anaerobic digestion

被引：70

作者：

Yun, Sining ^{[1
]}

Xing, Tian ^{[1
]}

Han, Feng ^{[1
]}

Shi, Jing ^{[1
]}

Wang, Ziqi ^{[1
]}

Fan, Qingyang ^{[1
]}

Xu, Hongfei ^{[1
]}

机构：

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

来源：

BIORESOURCE TECHNOLOGY | 2021年 / 320卷

基金：

国家重点研发计划;

关键词：

Anaerobic digestion; Electron carrier; First-principle DFT; Electron exchange capacity; Gene sequencing; TOTAL-ENERGY CALCULATIONS; METHANE PRODUCTION; CO-DIGESTION; METHANOGENIC PROPIONATE; COUNTER ELECTRODES; BIOGAS YIELD; DAIRY MANURE; WASTE-WATER; NANOPARTICLES; SLUDGE;

D O I：

10.1016/j.biortech.2020.124294

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Transition metal compounds have been widely used to enhance the anaerobic digestion (AD) performance, while the role of transition metal compounds in enhancing AD performance remains unclarified. In this work, the function of transition metal oxide accelerants (tantalum oxide, niobium oxide, hafnium oxide, and tungsten oxide) in enhanced AD systems was investigated from experimental and theoretical standpoints. Higher biogas production (565.01-617.85 mL/g VS), chemical oxygen demand degradation rate (67.17%-70.45%), total solids and volatile solids reduction rates (29.76%-34.71%, 51.83%-60.88%) were achieved in AD systems with transition metal oxide accelerants than the control (327.08 mL/g VS, 56.65%, 22.65%, and 41.18%). The first principle density functional theory calculations, electron exchange capacity analysis, and the 16S rRNA gene pyrosequencing demonstrated superior electron transfer and exchange capacities as well as microbial consortia development in transition metal oxides-induced DIET mechanism. This work provides a promising strategy for understanding the function of high-performance accelerants in AD systems.

引用

页数：12

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Abbas Y., 2021, RENEW SUSTAIN ENERGY, V135

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