硫酸盐还原环境下氮硫的生物转化及相互影响  

Biotransformation and Interaction of Nitrogen and Sulfur in Sulfate Reduction Environment

作　　者：冷钢 袁林江[1,2,3] 李梦博 杨丰丰 LENG Gang;YUAN Linjiang;LI Mengbo;YANG Fengfeng(School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;Key Laboratory of Environmental Engineering of Shanxi Province,Xi'an 710055,China;Key Laboratory of Northwest Water Resources and Environmental Ecology,Ministry of Education,Xi'an 710055,China)

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：《环境科学与技术》2023年第6期52-61,共10页Environmental Science & Technology

基　　金：国家自然科学基金资助项目(51878538)。

摘　　要：该文采用含氨态氮和硫酸盐的有机废水作为UASB反应器(R1)和厌氧污泥床反应器(R2)进水,研究了两反应器内NH4+-N和SO42-的转化途径、转化关联性及相互影响。结果表明,在进水COD为100 mg/L条件下,反应器对SO42-持续去除过程中R1出现平均15 mg/L、最高20 mg/L的NH4+-N脱除,R2出现平均10 mg/L、最高15 mg/L的NH4+-N脱除。研究认为,反应器中硫酸盐型厌氧氨氧化(SRAO)反应协同氨氧化、异养反硝化、异养硫酸盐还原(SR)及硫氧化反应共同完成同步脱氮除硫过程,且在SO42-缺乏条件下,NH4+-N和SO42-转化呈同步下降趋势。当增加进水COD至200 mg/L,引发SR活性剧烈增长,系统脱氮能力受抑制;而采用0.5~1.5 mmol/L Na2MoO4部分抑制SR活性可有效提升系统脱氮能力。Organic wastewater containing ammonia nitrogen and sulfate was used as influent of UASB reactor(R1)and anaerobic sludge bed reactor(R2).The transformation pathway,transformation correlation and interaction of NH-N and SO_(2)in the two reactors were studied.The results show that,under the condition of influent COD of 100 mg/L,the average NH+-N removal of R1 was 15 mg/L and the highest was 20 mg/L,while that of R2 was 10 mg/L and the highest was 15 mg/L during the continuous removal of SO_(4)^(2-).It is considered that the sulfate reduction and ammonium oxidation(SRAO)reaction in the reactor cooperates with ammonia oxidation,heterotrophic denitrification,heterotrophic sulfate reduction(SR)and sulfides oxidation to complete simultaneous denitrification and sulfate removal.And the transformation of NH-N and SO_(4)^(2-)showed a synchronous downward trend under the condition of lack of SO,.When the influent COD was increased to 200 mg/L,the SR activity increased sharply and the denitrification capacity of the system was inhibited.However,the partial inhibition of SR activity by NazMoO4 from 0.5 mmol/L to 1.5 mmol/L can effectively improve the denitrification capacity of the system.

关 键 词：硫酸盐还原 同步脱氮除硫 转化途径 关联性 相互影响 

分 类 号：X703[环境科学与工程—环境工程]