氧化还原介体强化生物反硝化脱氮研究进展  

Enhanced biological denitrification by redox mediators: A review

作　　者：陈甜甜 王先宝 张雨笛 高楚玥 谢怡俐 张安龙 CHEN Tiantian;WANG Xianbao;ZHANG Yudi;GAO Chuyue;XIE Yili;ZHANG Anlong(School of Environmental Science and Engineering,Shaanxi University of Science and Technology,Xi’an,710021,China)

机构地区：[1]陕西科技大学环境科学与工程学院,西安710021

出　　处：《环境化学》2021年第10期3199-3206,共8页Environmental Chemistry

基　　金：国家自然科学基金(52000126);咸阳市科学技术研究计划(2018k02-32);陕西省重点研发计划(2017DXM-SF-096)资助。

摘　　要：传统的生物脱氮包括氨化、硝化、反硝化,而反硝化过程是去除污水中含氮污染物的关键步骤.在实际污水处理过程中,低反硝化速率影响了生物系统脱氮效果.研究发现反硝化反应涉及多重电子传递过程,电子传递速率是影响反硝化速率的重要因素.氧化还原介体是一类能够在电子供体和电子受体之间可逆地被氧化和还原,加速电子传递的化合物.研究表明,氧化还原介体可以促进反硝化的电子转移速率,降低反应的活化能从而提高脱氮效果.本文总结了反硝化作用中电子传递过程,在此基础上,论述了氧化还原介体定义及作用,重点分析氧化还原介体的种类及其在反硝化过程中的应用,并指出了今后的研究方向,以提高氧化还原介体在反硝化过程中的应用.The traditional biological nitrogen removal includes ammoniation, nitrification and denitrification. Denitrification is the key step in nitrogen removal. Slow denitrification rate is the bottleneck for nitrogen removal in practical wastewater. Denitrification involved multiple electron transfer processes, and electron transfer rate was the important factor for denitrification rate. Redox mediators were compounds that can be reversibly oxidized and reduced between an electron donor and an electron acceptor, thus electron transfer can be accelerated. The studies showed that the redox mediators can improve the denitrification by increasing the electron transfer rate and decreasing the activation energy of the reaction. This paper summarized the electron transfer process of denitrification and discussed the definition and functions of redox mediators. The kinds of redox mediators and their application in the denitrification process was reviewed. Moreover, the future research directions were pointed out to improve the application of redox mediators in denitrification.

关 键 词：生物脱氮 氧化还原介体 反硝化 电子传递 

分 类 号：X703[环境科学与工程—环境工程]