Synergistic removal of nitrate by a cellulose-degrading and denitrifying strain through iron loaded corn cobs filled biofilm reactor at low C/N ratio: Capability, enhancement and microbiome analysis

被引：13

作者：

Li, Jiawei ^{[1
,2
]}

Ali, Amjad ^{[1
,2
]}

Su, Junfeng ^{[1
,2
]}

Huang, Tinglin ^{[1
,2
]}

Zhai, Zhenyu ^{[1
,2
]}

Xu, Liang ^{[1
,2
]}

机构：

[1] Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Peoples R China

[2] Xian Univ Architecture & Technol, Shaanxi Key Lab Environm Engn, Xian 710055, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2023年 / 369卷

基金：

中国国家自然科学基金;

关键词：

Bacterial synergism; Biofilm bioreactor; Cellulose decomposition; Denitrification; Low C; N ratio;

D O I：

10.1016/j.biortech.2022.128433

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Optimization of nitrate removal rate under low carbon-to-nitrogen ratio has always been one of the research hotspots. Biofilm reactor based on functional carrier and using interspecific synergic effect of strains provides an insight. In this study, iron-loaded corn cob was used as a functional carrier that can contribute to the cellulose degradation, iron cycling, and collaborative denitrification process of microorganisms. During biofilm reactor operation, the maximum nitrate removal efficiency was 99.30% and could reach 81.73% at no carbon source. Dissolved organic carbon and carrier characterization showed that strain ZY7 promoted the release of carbon source. The crystallinity of cellulose I and II in carrier of experimental group increased by 31.26% and decreased by 21.83%, respectively, in comparison to the control group. Microbial community showed the synergistic effect among different strains. The vitality and metabolic activity of the target microorganisms in bioreactor were increased through interspecific bacterial cooperation.

引用

页数：9