絮状-颗粒污泥单级自养脱氮系统启动及菌群结构分析

发布时间：2018-04-12 08:24

  本文选题：单级自养脱氮 + 低氨氮废水　； 参考：《中国给水排水》2017年17期

【摘要】：利用序批式反应器(SBR),以连续微量曝气方式快速启动单级自养脱氮系统,并对启动调控措施及稳定运行过程进行研究。结果表明,在连续微量曝气条件下,控制系统DO为0.24~0.35 mg/L、进水NH_4~+-N为50 mg/L、HRT为3 h、温度为28~32℃时,成功启动了单级自养脱氮系统。稳定运行时TN去除率保持在85%左右,平均容积去除负荷达到0.18 kg N/(m~3·d)。随着系统脱氮性能的提升,短程硝化与厌氧氨氧化酶促反应的关键酶AMO、HDH活性不断提高,稳定运行时分别为4.24μmol NO_2~-N/(mg Pro·min)和0.45μmol Cyto-c/(mg Pro·min)。采用16S r DNA高通量测序技术对不同时期的微生物种群结构进行检测后发现,絮状和颗粒污泥样品中Candidatus Brocadia(AAOB)相对丰度分别从1.9%、33.5%增加到5.8%、46.5%,Nitrosomonadaceace(AOB)主要存在于絮状污泥中,相对丰度从2.8%增至7.3%。
[Abstract]:The single stage autotrophic denitrification system was rapidly started by continuous micro aeration in a sequencing batch reactor, and the startup control measures and stable operation process were studied.The results show that the single stage autotrophic denitrification system has been successfully started under continuous micro aeration condition when the control system do is 0.24 mg / L, the influent NH4 ~ -N is 50 mg / L, HRT is 3 h, and the temperature is 2832 鈩，

本文编号：1738949