摘要
采用序批式生物反应器(SBR)处理模拟低C/N污水,通过优化操作模式,实现了同步短程硝化反硝化脱氮。考察了水质条件和曝气时间对短程硝化启动的影响,结果表明:利用溶解氧(DO)的一阶导数作为控制参数,精准控制曝气时间,可实现短程硝化的快速启动,并能长期保持NAR高于95%。探究了SBR的间歇曝气和分段进水次数对SSND脱氮效率的影响,结果表明:分段进水次数的增加有利于提高脱氮效率,次数为3时最优,SBR出水TN浓度为15 mg/L左右。各实验阶段污泥样本的高通量测序结果表明:氨氧化细菌Nitrosomonas相对丰度增加,亚硝酸盐氧化菌Nitrospira相对丰度减少至未检出、具有异养硝化-好氧反硝化功能的Paracoccus成为SBR内优势菌属,实验结果和微生物高通量测序结果均验证了本研究的控制方法的有效性。
In this study,a sequencing batch bioreactor(SBR)was used to treat simulated low C/N wastewater,and simultaneous short-cut nitrification denitrification was achieved by optimising the operation mode.The effects of water quality conditions and aeration time on the start-up of short-cut nitrification were investigated,and the results showed that using the first-order derivative of dissolved oxygen(DO)as a control parameter and precise control of aeration duration could achieve rapid start-up of short-cut nitrification and maintain NAR above 95%for a long time.The effect of intermittent aeration and step feed of the SBR on the denitrification efficiency of SSND was investigated.The results showed that the increase in the number of step feeds was beneficial to improve the denitrification efficiency,and the optimum number was 3.The TN concentration of the SBR effluent was about 15 mg/L.High throughput sequencing of sludge samples at each stage of the experiment showed that the relative abundance of Nitrosomonas increased,the relative abundance of Nitrospira decreased to non-detect,and Paracoccus with heterotrophic nitrification-aerobic denitrification function became the dominant genus in the SBR,the experiment results verifying the effectiveness of the control method in this study.
作者
吴朕君
杜亚飞
王艺涵
陈莉杰
郭婷
杨耀党
李顺义
Wu Zhenjun;Du Yafei;Wang Yihan;Chen Lijie;Guo Ting;Yang Yaodang;Li Shunyi(Henan Xin’anli Safety Technology Co.Postdocral program,Zhenghzou 450001,China;School of Environmental Engineering,Henan University of Technology,Zhengzhou 450001,China;School of Ecology and Environment,Zhengzhou University,Zhengzhou 450001,China)
出处
《环境工程》
CAS
CSCD
北大核心
2023年第S02期118-124,共7页
Environmental Engineering
基金
河南省博士后科研项目(202001050)
河南省高等学校重点科研项目应用研究计划(21B610005)
河南省自然科学基金项目-青年科学基金项目(202300410107)
河南省重点研发与推广专项(科技攻关)(212102310070)
关键词
同步短程硝化反硝化
序批式生物反应器
低C/N污水
脱氮性能
微生物机理
simultaneous short-course nitrification denitrification
sequencing batch reactor
low C/N wastewater
N removal performance
microbial mechanism
作者简介
第一作者:吴朕君(1985-),男,博士,讲师,主要研究方向为污水生物脱氮技术。wuzhenjun@haut.edu.cn
