Low carbon-to-nitrogen ratio digestate from high-rate anaerobic baffled reactor facilitates heterotrophic/autotrophic nitrifiers involved in nitrogen removal

被引：5

作者：

Zhou, Xiangtong ^{[1
]}

Arslan, Muhammad ^{[3
]}

Liu, Zhigang ^{[1
]}

Li, Da ^{[2
]}

Xi, Haipeng ^{[1
]}

Feng, Yujie ^{[2
]}

Li, Shanwei ^{[1
]}

Wei, Jing ^{[1
]}

Rong, Xinshan ^{[1
]}

Liang, Zhishui ^{[4
]}

Wang, Xiaochun ^{[1
]}

Wu, Zhiren ^{[1
]}

El-Din, Mohamed Gamal ^{[3
]}

机构：

[1] Jiangsu Univ, Inst Environm Hlth & Ecol Safety, Zhenjiang 212013, Peoples R China

[2] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, 73 Huanghe Rd,Nangang Dist, Harbin 150090, Peoples R China

[3] Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB T6G 1H9, Canada

[4] Southeast Univ, Sch Civil Engn, 2 Sipailou, Nanjing 210096, Jiangsu, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2022年 / 359卷

关键词：

Domestic wastewater; Biomass entrapment; Baffled anaerobic -aerobic reactor; Bio-nest; Metagenomics; Nitrogen metabolic pathway; DOMESTIC WASTE-WATER; EXTRACELLULAR POLYMERIC SUBSTANCES; ACTIVATED-SLUDGE; BASALT FIBER; PERFORMANCE; CARRIER; NITRIFICATION; STABILITY; GENOMES;

D O I：

10.1016/j.biortech.2022.127346

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

In this study, baffled anaerobic-aerobic reactors (AOBRs) with modified basalt fiber (MBF) carriers and felt were used to treat domestic wastewater (DWW). The influent was first treated in anaerobic compartments, with the NH4+-N containing digestate refluxed into aerobic compartment for nitrification. The nitrified liquid was channeled to the anaerobic compartments for further denitrification. Under optimal conditions, AOBR with MBF carriers could remove 91% chemical oxygen demand (COD) and 81% total nitrogen (TN), with biomass production increased by 7.6%, 4.5% and 8.7% in three successive anaerobic compartments compared to the control. Biological viability analysis showed that live cells outnumbered dead cells in bio-nests. Metagenomics analysis showed that multiple metabolic pathways accounted for nitrogen conversion in anaerobic and aerobic compartments. More importantly, low COD/TN ratio digestate facilitated heterotrophic nitrification-aerobic denitrification (HN-AD) species growth in aerobic compartment. This study provides a promising strategy to source treatment of DWW from urban communities.

引用

页数：9

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