Anaerobic ammonium oxidation (ANAMMOX) is a promising technology for sewage treatment. Alternating aerobic/anoxic conditions have been widely adopted to achieve partial nitrification (PN), so as to provide substrates for ANAMMOX. In this study, the feasibility of PN with the strategy of intermittent aeration was investigated under mainstream conditions. At a low dissolved oxygen (DO) concentration, the nitrogen conversion characteristic under different intermittent aeration modes was evaluated by mathematical simulation and experimental method with (1) ordinary activated sludge, (2) mixed sludge with anaerobic ammonia-oxidizing bacteria (AnAOB), and (3) PN sludge, as seed sludge. The existence of functional microorganisms, such as AnAOB and denitrifying bacteria, which can utilize nitrites, was the prerequisite for NOB activity inhibition in the alternating aerobic/anoxic condition. Therefore, low nitrite may be an important factor in NOB activity inhibition under alternating aerobic/anoxic conditions. This study demonstrated a key controlling factor for NOB activity inhibition with alternating aerobic/anoxic condition.

厌氧氨氧化（ANAMMOX）是一种很有前途的污水处理技术。交替好氧/缺氧条件已被广泛采用以实现部分硝化（PN），从而为厌氧氨氧化提供底物。在本研究中，研究了在主流条件下采用间歇曝气策略进行 PN 的可行性。在低溶解氧（DO）浓度下，通过数学模拟和实验方法评估了不同间歇曝气模式下的氮转化特性（1）普通活性污泥，（2）厌氧氨氧化细菌（AnAOB）混合污泥， (3) PN污泥，作为种子污泥。存在可利用亚硝酸盐的功能性微生物，如 AnAOB 和反硝化细菌，是在好氧/缺氧交替条件下抑制 NOB 活性的先决条件。因此，低亚硝酸盐可能是交替需氧/缺氧条件下 NOB 活性抑制的重要因素。该研究证明了在有氧/缺氧交替条件下抑制 NOB 活性的关键控制因素。