Nitrification-denitrification co-metabolism in an algal-bacterial aggregates system for simultaneous pyridine and nitrogen removal

被引：14

作者：

Zhang, Xiaoyu ^{[1
]}

Chen, Dan ^{[1
]}

Hou, Xinying ^{[1
]}

Jiang, Na ^{[1
]}

Li, Yan ^{[1
]}

Ge, Shijian ^{[1
]}

Mu, Yang ^{[2
]}

Shen, Jinyou ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Sch Environm & Biol Engn, Key Lab Environm Remediat & Ecol Hlth, Minist Ind & Informat Technol, Nanjing 210094, Peoples R China

[2] Univ Sci & Technol China, Dept Environm Sci & Engn, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2023年 / 460卷

基金：

中国国家自然科学基金;

关键词：

Algal-bacterial aggregates system; Pyridine biodegradation; Nitrification-denitrification; Microenvironment; Co-metabolism; KEY ROLE; WASTE; BIOAUGMENTATION; BIODEGRADATION; GRANULATION; CONSORTIUM; MICROALGAE; FEASIBILITY; DEGRADATION; INHIBITION;

D O I：

10.1016/j.jhazmat.2023.132390

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Photosynthetic oxygenation in algal-bacterial symbiotic (ABS) system was mainly concerned to enhance contaminant biodegradation by developing an aerobic environment, while the role of nitrification-denitrification involved is often neglected. In this study, an algal-bacterial aggregates (ABA) system was developed with algae and activated sludge (PBR-1) to achieve simultaneous pyridine and nitrogen removal. In PBR-1, as high as 150 mg center dot L-1 pyridine could be completely removed at hydraulic residence time of 48 h. Besides, total nitrogen (TN) removal efficiency could be maintained above 80%. Nitrification-denitrification was verified as the crucial process for nitrogen removal, accounting for 79.3% of TN removal at 180 mu mol center dot m(-2)center dot s(-1). Moreover, simultaneous pyridine and nitrogen removal was enhanced through nitrification-denitrification co-metabolism in the ABA system. Integrated bioprocesses in PBR-1 including photosynthesis, pyridine biodegradation, carbon and nitrogen assimilation, and nitrification-denitrification, were revealed at metabolic and transcriptional levels. Fluorescence in situ hybridization analysis indicated that algae and aerobic species were located in the surface layer, while denitrifiers were situated in the inner layer. Microelectrode analysis confirmed the microenvironment of

引用

页数：11

共 52 条

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