亚硝氮停供及恢复供给对Anammox反应器中氮去除的影响

发布时间：2018-03-05 09:58

本文选题：厌氧氨氧化　切入点：氨氮“超量去除”　出处：《环境科学学报》2017年12期 　论文类型：期刊论文

【摘要】：在Anammox-UASB反应器中研究了亚硝氮停供及恢复供给后不同进水亚硝氮/氨氮比(R_I)对Anammox系统脱氮的影响,对Anammox系统停供亚硝氮培养后的污泥微生物群落进行了分析.结果表明,Anammox反应器在长期停供亚硝氮培养后,微生物多样性增加,氨氧化菌(Nitrosomonas)和Anammox菌都大量增殖,这两种微生物通过协同作用使得部分氨氮得以去除,NH_4~+-N最大去除速率可达68.77 mg·L~(-1)·d~(-1),出水p H低于进水.反应器恢复亚硝氮供给后,脱氮效果快速恢复.Anammox反应器中存在的氨氮"超量去除"现象是由氨氧化菌作用引起的,氨氧化菌活性易受亚硝氮浓度抑制.氨氮"超量去除"量占氨氮总去除量的百分比与R_I呈负相关关系.当R_I为0.17时,氨氮"超量去除"量占氨氮总去除量的百分比高达68.83%;当R_I增加到1.30∶1后,氨氮"超量去除"现象基本消失.
[Abstract]:The effect of different influent ratio of nitrite nitrogen / ammonia nitrogen on denitrification of Anammox system was studied in Anammox-UASB reactor. The microbial community of sludge cultured in Anammox system was analyzed. The results showed that the microbial diversity increased and the ammonia oxidizing bacteria Nitrosomonas and Anammox increased after the long term suspension of nitrite in Anammox reactor. The maximum removal rate of NH _ 4 ~ -N reached 68.77 mg 路L ~ (-1) 路D ~ (-1) 路D ~ (-1), and the effluent pH was lower than that of the influent. The "excess removal" of ammonia nitrogen in the anammox reactor was caused by the action of ammonia-oxidizing bacteria. The activity of ammonia-oxidizing bacteria was easily inhibited by nitrite concentration. The percentage of ammonia nitrogen "excess removal" in total ammonia-nitrogen removal was negatively correlated with R _ I. When the Ri was 0.17, there was a negative correlation between the activity of ammonia oxidizing bacteria and the total ammonia nitrogen removal. The percentage of "excess removal" of ammonia nitrogen to total ammonia nitrogen removal was 68.833.When the Rflesh I increased to 1.30: 1, the phenomenon of "excessive removal" of ammonia nitrogen basically disappeared.
【作者单位】：西安建筑科技大学陕西省环境工程重点实验室西北水资源与环境生态教育部重点实验室;
【基金】：国家自然科学基金(No.51278406)~~
【分类号】：X703

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