Spatiotemporal Assembly and Immigration of Heterotrophic and Anammox Bacteria Allow a Robust Synergy for High-Rate Nitrogen Removal

Du Rui; Liu Qingtao; Li CongLi XiangchenCao ShenbinPeng Yongzhen

首页> 外文期刊>Environmental Science & Technology: ES&T >Spatiotemporal Assembly and Immigration of Heterotrophic and Anammox Bacteria Allow a Robust Synergy for High-Rate Nitrogen Removal

【24h】

Spatiotemporal Assembly and Immigration of Heterotrophic and Anammox Bacteria Allow a Robust Synergy for High-Rate Nitrogen Removal

机译：Spatiotemporal Assembly and Immigration of Heterotrophic and Anammox Bacteria Allow a Robust Synergy for High-Rate Nitrogen Removal

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

Thisarticle revealed the significant role of bacterialaggregation and spatiotemporal immigration in a novel partial denitrification/anammoxsystem for stable nitrogen removal. The novel partial denitrification-driven anammox (PD/A)is an energy-efficientmethod for nitrogen removal from wastewater. However, its stabilityand efficiency are impeded by the competition between heterotrophicdenitrifying bacteria and relatively slow-growing anammox bacteria.In this study, a PD/A granular sludge system was developed, whichachieved a nitrogen removal efficiency of 94% with 98% anammox contribution,even as the temperature dropped to 9.6 degrees C. Analysis of bacterialactivity in aggregates of different sizes revealed that the largestgranules (>2.0 mm) exhibited the highest anammox activity, 2.8timesthat of flocs (<0.2 mm), while the flocs showed significantly highernitrite production rates of PD, more than six times that of the largestgranules. Interestingly, fluorescent in situ hybridization (FISH)combined with confocal laser scanning microscopy (CLSM) revealed anest-shaped structure of PD/A granules. The Thauera genus, a key contributor to PD, was highly enriched at the outeredge, providing substrate nitrite for anammox bacteria inside thegranules. As temperature decreased, the flocs transformed into smallgranules to efficiently retain anammox bacteria. This study providesmultidimensional insights into the spatiotemporal assembly and immigrationof heterotrophic and autotrophic bacteria for stable and high-ratenitrogen removal.

著录项

来源
《Environmental Science & Technology: ES&T》 |2023年第24期|9075-9085|共11页
作者
Du Rui; Liu Qingtao; Li CongLi XiangchenCao ShenbinPeng Yongzhen;
展开▼
作者单位

Beijing Univ Technol;

展开▼
收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
granular sludge; partial denitrification; anammox; size fraction; spatial distribution; EXTRACELLULAR POLYMERIC SUBSTANCES; GRANULAR SLUDGE; BIOFILM; SEWAGE; CORE;

Spatiotemporal Assembly and Immigration of Heterotrophic and Anammox Bacteria Allow a Robust Synergy for High-Rate Nitrogen Removal

摘要

著录项

相关主题

期刊订阅