Bioresource Technology ( IF 11.4 ) Pub Date : 2021-10-12 , DOI: 10.1016/j.biortech.2021.125986 Yueru Zhao 1 , Qiong Zhang 1 , Yi Peng 2 , Yongzhen Peng 1 , Xiyao Li 1 , Hao Jiang 1
The start-up, efficient, and secure operation of Anammox treating low ammonia sewage, is an important research focus. In this study, a partial nitrification–denitrification coupled with simultaneous Anammox and denitrification (PND-SAD) process was achieved in sequencing batch reactor/up-flow anaerobic sludge bed (SBR-UASB). The key measures to maintain high efficiency PND were: (i) controlling dissolved oxygen in the SBR below 0.5 mg/L, which is not only conducive to PN, but also promotes the contribution of simultaneous nitrification and denitrification to nitrogen removal; (ii) monitoring the nitrate (NO3–-N) of SBR effluent and discharging sludge to wash out nitrate oxidation bacteria when the NO3–-N exceeds 1.0 mg/L. The nitrite accumulation rate reached 97.6%. SBR effluent and domestic sewage entered the UASB. Although Candidatus Brocadia only accounted for 0.8%, its contribution to nitrogen removal reached 76.8%. In PND-SAD system, the aerobic HRT was only 3.8 h, nitrogen removal efficiency up to 97.3%.
中文翻译:
通过两级部分硝化和反硝化(PND)结合同步厌氧氨氧化和反硝化(SAD)从生活污水中进行高级脱氮
厌氧氨氧化处理低氨污水的启动、高效、安全运行是一个重要的研究热点。在这项研究中,在序批式反应器/上流式厌氧污泥床(SBR-UASB)中实现了部分硝化-反硝化与同步厌氧氨氧化和反硝化(PND-SAD)工艺相结合。保持高效PND的关键措施是:(i)将SBR中的溶解氧控制在0.5mg/L以下,不仅有利于PN的产生,而且有利于同时硝化反硝化对脱氮的贡献;(ii) 监测SBR 出水的硝酸盐 (NO 3 – -N),当 NO 3 –-N 超过 1.0 毫克/升。亚硝酸盐积累率达到97.6%。SBR 污水和生活污水进入 UASB。虽然Candidatus Brocadia仅占0.8%,但其对脱氮的贡献达到了76.8%。在PND-SAD系统中,好氧HRT仅为3.8 h,脱氮效率高达97.3%。