缺氧水域
曝气
氮气
无氧运动
水力停留时间
污水
制浆造纸工业
化学
环境工程
碳纤维
污水处理
环境科学
环境化学
废物管理
材料科学
生物
工程类
复合材料
有机化学
复合数
生理学
作者
Xiyue Zhang,Xiyao Li,Liang Zhang,Yongzhen Peng
标识
DOI:10.1016/j.biortech.2023.129979
摘要
Advanced nitrogen removal cannot be achieved through the conventional biological nitrogen removal process, which requires higher carbon sources and aeration energy. The proposal of intermittent aeration in the aerobic chambers offered an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio (C/N) municipal sewage, using a plug-flow reactor with anaerobic/aerobic/anoxic (AOA) process. Due to the effective utilization of internal carbon sources through the intermittent aeration, the total inorganic nitrogen removal efficiency (NRE) increased to 77.9 ± 3.2 % with the mean aerobic hydraulic retention time of only 3.2 h and a low C/N of 3.3 during the operation of 210 days. Polyhydroxyalkanoates dominated the nitrogen removal in this AOA system, accounting for 48.0 %, primarily occurring in the alternant aerobic/anoxic chambers. Moreover, the microbial community structure remained unchanged while the NRE increased to 77.9 %. This study provided an efficient and economic strategy for the continuous plug-flow AOA process.
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