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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.
In the Anammox-UASB reactor, the effects of nitrite / ammonia nitrogen ratio (R_I) on denitrification of Anammox system after stopping supply of nitrite nitrogen and supplying resupply of nitrite were studied. The results showed that the diversity of microorganisms in Anammox reactor after long-term suspension of nitrite-nitrogen culture increased with the proliferation of Nitrosomonas and Anammox bacteria, Ammonia nitrogen can be removed, the maximum removal rate of NH_4 ~ + -N can reach 68.77 mg · L -1 · d -1, and the effluent p H is lower than that of the influent. After the reactor resumes the supply of nitrite nitrogen, The effect of rapid recovery.Anammox reactor presence of ammonia nitrogen “excess removal ” phenomenon is caused by the role of ammonia oxidizing bacteria, ammonia oxidizing bacteria activity susceptible to nitrite concentration inhibition. When the R_I was 0.17, the percentage of ammonia nitrogen “excess removal” accounted for 68.83% of the total removal of ammonia nitrogen; when R_I increased to 1.30:1, ammonia nitrogen “Excess removal” phenomenon disappeared.