净水技术2025，Vol.44Issue(7)：78-86,114,10.DOI:10.15890/j.cnki.jsjs.2025.07.009
硫自养动态膜生物反应器脱氮性能及其膜污染行为
Nitrogen Removal Performance and Membrane Fouling Behavior of Sulfur Autotrophic Dynamic MBR
摘要
Abstract
[Objective]Recently,nitrate contamination still exists in water bodies in China,which not only leads to frequent eutrophication,but also potentially endangers human health.Therefore,this study aims to effectively address nitrogen-containing water pollution issues.[Methods]In the experiment,autotrophic denitrification process of elemental sulfur powder was combined with gravity-driven dynamic membrane bioreactor technology to investigate the denitrification potential and membrane fouling behavior of the coupling system at different hydraulic retention times(HRTs).[Results]When the initial sulfur powder/sludge ratio was 4 and the influent NO3-N was approximately 22 mg/L,the HRT was shortened from 12 h to 4 h,and the removal rate of NO3--N reached 100％in a short time.However,when the HRT was 2 h,the operating effect of the reactor began to deteriorate,the NO3--N removal rate decreased significantly,and the accumulation of NO2--N was serious.During the whole operation,the transmembrane pressure difference increased from 0 to 1 470 Pa.Meanwhile,the disparity in pollutant concentration between supernatant and effluent revealed that the dynamic membrane exhibited notable secondary removal performance of NO3--N,indicating that the dynamic membrane had formed stably and had good metabolic activity.The observation of dynamic membranes at different stages by scanning electron microscopy showed that a large number of bacilli and filamentous bacteria adhering to the sulphur powder accumulated within the dynamic membrane mesh,ultimately resulting in severe irreversible membrane contamination.[Conclusion]The sulfur-autotrophic dynamic membrane bioreactor proposed in this study demonstrates high denitrification performance and resilience to shock loads.The findings are expected to provide a certain technological foundation for the development of green and low-consumption wastewater denitrification technologies.关键词
膜生物反应器(MBR)/硫自养反硝化/动态膜反应器/水力停留时间(HRT)/膜污染/悬浮污泥Key words
membrane bioreactor(MBR)/sulfur autotrophic denitrification/dynamic membrane reactors/hydraulic retention time(HRT)/membrane fouling/suspended sludge分类
资源环境引用本文复制引用
顾旭,余思成,陈志豪,蒲映霏,程鸿,王静,周忠波..硫自养动态膜生物反应器脱氮性能及其膜污染行为[J].净水技术,2025,44(7):78-86,114,10.基金项目
2021年国家重大水利工程建设基金(三峡后续工作)(Z165070000005) （三峡后续工作）
重庆市自然科学基金(CSTC2021JCYJMSXMX0399,CSTB2022NSCQ-BHX0038) （CSTC2021JCYJMSXMX0399,CSTB2022NSCQ-BHX0038）
西南大学大学生创新训练计划(202210635113) （202210635113）
重庆市万州科技计划(wzstc20210309) （wzstc20210309）
