不同电子供体用于混养反硝化系统强化脱氮研究  

Different electron donors for enhanced nitrogen removal in mixotrophic denitrification system

作　　者：刘兆瀛 李海燕 张紫阳[1,2,3] 简美鹏 LIU Zhaoying;LI Haiyan;ZHANG Ziyang;JIAN Meipeng(Beijing Energy Conservation&Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center,School of Environment and Energy Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044;Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control,School of Environment and Energy Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044;Key Laboratory of Urban Stormwater System and Water Environment,Ministry of Education,Beijing University of Civil Engineering and Architecture,Beijing 100044)

机构地区：[1]北京建筑大学,环境与能源工程学院,北京节能减排与城乡可持续发展省部共建协同创新中心,北京100044 [2]北京建筑大学,环境与能源工程学院,北京市可持续城市排水系统构建与风险控制工程技术研究中心,北京100044 [3]北京建筑大学,城市雨水系统与水环境教育部重点实验室,北京100044

出　　处：《环境科学学报》2023年第12期327-335,共9页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.51978032,52270086);青年北京学者计划(No.024);北京市教委-市自然基金委联合资助项目(No.21JH0024);北京建筑大学金字塔人才工程-建大领军培养计划(No.JDLJ20200301)。

摘　　要：针对雨水径流中NO_(3)^(-)-N含量较高易引起受纳水体富营养化的问题,利用植物碳源和硫作为电子供体构建混养反硝化系统强化脱氮.通过对比不同植物碳源(芦苇、马蔺、黄菖蒲、鸢尾)的脱氮效能和释碳性能,优选芦苇作为混养反硝化系统的有机电子供体.基于芦苇构建的不同硫碳比(0.2、0.6、0.8、1.0)混养反硝化系统运行效能表明,高硫碳比系统在运行后期NO_(3)^(-)-N去除率(98.14%)相对稳定且反硝化条件较为适宜,但硫添加量的提高不利于芦苇持续释碳,还导致了较为明显的NH_(4)^(+)-N和SO_(4)^(2-)积累现象.运行效果评价显示出0.2硫碳比系统具有最低的综合污染指数,表现出最佳的脱氮同步副产物控制能力.本研究结果可为雨水径流混养反硝化脱氮技术提供理论支撑.Aiming at the problem of high NO_(3)^(-)-N content in stormwater runoff,causing eutrophication in receiving water bodies,the mixotrophic denitrification system was constructed using plant carbon source and sulfur as electron donors to enhance nitrogen removal.Reed was selected as the preferred organic electron donor for mixotrophic denitrification system by comparing the denitrification efficiency and carbon release performance of different plant carbon sources(Reed,Malus,Acorus calamus,and Iris).Reed-based mixotrophic denitrification systems with different sulfur to carbon ratios(0.2,0.6,0.8,and 1.0)were compared,in which the results showed that the systems with high sulfur to carbon ratio had relatively stable NO_(3)^(-)-N removal efficiencies(98.14%)and suitable denitrification conditions in the late operation stage.However,the increase in sulfur addition was detrimental to the sustained carbon release from reed and led to a more pronounced accumulation of NH4+-N and SO_(4)^(2-).The evaluation of operational performance showed that the system with a sulfur to carbon ratio of 0.2 had the lowest comprehensive pollution index,achieving superior nitrogen removal efficiency and by-products control.These results provide theoretical support for the nitrogen removal from stormwater runoff in the mixotrophic denitrification system.

关 键 词：雨水径流 氮污染 混养反硝化 电子供体 植物碳源 硫碳比 

分 类 号：X703[环境科学与工程—环境工程]