Principles for quorum sensing-based exogeneous denitrifier enhancement of nitrogen removal in biofilm: a review

IF 11.4 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Critical Reviews in Environmental Science and Technology Pub Date : 2022-11-11 DOI:10.1080/10643389.2022.2136932

Ying Zhu, Jinfeng Wang, Qiuju Liu, Ying Jin, L. Ding, H. Ren

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引用次数: 1

Abstract

Abstract Denitrifying bacteria play critical roles in enhancing biological biofilm denitrification for nitrogen removal in industrial and municipal wastewater treatment and groundwater remediation. Evidence intensively confirms that exogenous quorum sensing (QS) bacteria prompt biofilm formation and denitrification. Yet, exogenous bacteria forfeiting during bioaugmentation may occur despite of its priority effect and improved community function, because of open, intricate traits in wastewater treatment system. Critical topics include regulating signal-based microecological structure, effectively assembling 3D biofilm, and regulating carbon and nitrogen metabolization of denitrifiers to reduce CO2 and N2O emissions. This review demonstrates classifications of denitrifiers and the vital role of QS in regulating biofilm denitrification. Furthermore, the ecological principles of microbial community construction with the addition of exogenous denitrifiers are summarized. Moreover, the effects of signaling molecules on carbon and nitrogen transcription and metabolization are discussed. In conclusion, technologies based on quorum sensing for enhanced denitrification have high application potential and challenges. Herein, we provide a guideline for enhancing nitrogen removal by exogenous quorum-sensing bacteria and synthetic biofilms design during upgrading of municipal wastewater treatment plants. GRAPHICAL ABSTRACT

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基于群体感应的外源反硝化菌增强生物膜脱氮的原理综述

摘要在工业和城市污水处理和地下水修复中，反硝化菌在增强生物膜反硝化脱氮方面发挥着关键作用。有证据有力地证实了外源群体感应（QS）细菌促进生物膜的形成和反硝化作用。然而，由于废水处理系统的开放性和复杂性，外源细菌在生物强化过程中可能会丧失作用，尽管其具有优先作用和改善的群落功能。关键主题包括调节基于信号的微生态结构，有效组装3D生物膜，以及调节反硝化菌的碳和氮代谢以减少CO2和N2O排放。本文综述了反硝化菌的分类以及QS在调节生物膜反硝化中的重要作用。此外，还总结了添加外源反硝化菌构建微生物群落的生态学原理。此外，还讨论了信号分子对碳氮转录和代谢的影响。总之，基于群体感应的强化反硝化技术具有很高的应用潜力和挑战。在此，我们为在城市污水处理厂升级过程中通过外源群体感应细菌和合成生物膜设计来提高脱氮效果提供了指导。图形摘要

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来源期刊

Critical Reviews in Environmental Science and Technology 环境科学-环境科学

CiteScore

27.30

自引率

1.60%

发文量

审稿时长

2 months

期刊介绍： Two of the most pressing global challenges of our era involve understanding and addressing the multitude of environmental problems we face. In order to tackle them effectively, it is essential to devise logical strategies and methods for their control. Critical Reviews in Environmental Science and Technology serves as a valuable international platform for the comprehensive assessment of current knowledge across a wide range of environmental science topics. Environmental science is a field that encompasses the intricate and fluid interactions between various scientific disciplines. These include earth and agricultural sciences, chemistry, biology, medicine, and engineering. Furthermore, new disciplines such as environmental toxicology and risk assessment have emerged in response to the increasing complexity of environmental challenges. The purpose of Critical Reviews in Environmental Science and Technology is to provide a space for critical analysis and evaluation of existing knowledge in environmental science. By doing so, it encourages the advancement of our understanding and the development of effective solutions. This journal plays a crucial role in fostering international cooperation and collaboration in addressing the pressing environmental issues of our time.