有机条件下硫酸盐型厌氧氨氧化生物反应机理研究  

Study on the biological reaction mechanism of sulfate reduction and ammonia oxidation under organic condition

作　　者：杨江伟 袁林江[1,2,3] 王茹 杨丰丰 YANG Jiangwei;YUAN Linjiang;WANG Ru;YANG Fengfeng(School of Environmental and Municipal Engineering,Xi’an University of Architecture and Technology,Xi’an Shaanxi 710055;Shaanxi Key Laboratory of Environment Engineering,Xi’an Shaanxi 710055;Key Laboratory of Northwest Water Resources and Environment Ecology,Ministry of Education,Xi’an Shaanxi 710055)

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]陕西省环境工程重点实验室,陕西西安710055 [3]西北水资源与环境生态教育部重点实验室,陕西西安710055

出　　处：《环境污染与防治》2024年第1期68-75,共8页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.51878538)。

摘　　要：为探究有机条件下硫酸盐型厌氧氨氧化(SRAO)生物反应机理,在上流式厌氧污泥床(UASB)反应器中,建立了SRAO反应体系,实现氨氮与硫酸盐同步去除。通过物质衡算、活性测定、微生物分析等,总结获得UASB反应器中SRAO过程分步分层进行的特点。首先,在中下层污泥中,氨氮与硫酸盐在微生物作用下发生反应,生成硫离子和硝态氮;随后,在中上层污泥中,硫离子与硝态氮发生硫自养反硝化反应,生成硫酸盐和氮气。反应器中硫离子的积累会抑制SRAO微生物活性,因此,第二步反应是整体反应的限速步骤。破解硫离子对SRAO微生物的活性抑制,是SRAO技术发展面临的一大难题。To investigate the biological reaction mechanism of sulfate reduction and ammonia oxidation(SRAO)under organic condition,the SRAO reaction system was established in an up-flow anaerobic sludge bed(UASB)reactor,where ammonia nitrogen and sulfate could be removed simultaneously.The SRAO process in the UASB was found to be carried out in steps and layers after mass balance calculation,activity measurement and microbial analysis.First,in the middle and lower sludge,ammonia nitrogen reacted with sulfate under the action of microorganisms to produce sulfur ion and nitrate nitrogen.Subsequently,in the upper and middle sludge,sulfur ion reacted with nitrate nitrogen by sulfur-dependent autotrophic denitrification microbes to form sulfate and nitrogen.Since the accumulation of sulfur ion in the reactor inhibited SRAO microbial activity,the second reaction step was the rate-limiting step of the overall reaction.To solve the inhibition of sulfur ion to the SRAO microbes is a big challenge in future for the development of SRAO.

关 键 词：上流式厌氧污泥床 硫酸盐型厌氧氨氧化 硫自养反硝化 微生物菌群分析 

分 类 号：X703[环境科学与工程—环境工程]