Abstract An anaerobic ammonium oxidation (anammox) membrane bioreactor operated at 25 °C was used to investigate nitrogen removal under different operation conditions, namely, different sludge retention time (SRT) and nitrogen loading rate (NLR). The inhibition processes caused by high substance concentrations and over-loading were able to be circumvented by various adjustment methods. Furthermore, specific anammox activity (SAA) tests were performed to evaluate the effects of ammonium and nitrite on the anammox sludge. Over an SRT of 500 d, the content of volatile suspended solids (VSS) gradually increased from 125 mg/L to 5590 mg/L, and the maximum nitrogen removal rate (NRR) reached 1.18 kg N/m3/d. When the SRT was decreased to 50 d, the sludge concentration declined gradually, which necessitated an increase in the sludge loading rate (SLR), and the maximum sludge nitrogen removal rate (SNRR) of 0.67 g total nitrogen (TN)/g VSS/d was achieved at this time.

中文翻译：

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在 25 °C 下运行的厌氧氨氧化膜生物反应器中，在高污泥负荷率下提高脱氮率的策略

摘要 采用厌氧氨氧化（anammox）膜生物反应器在25 ℃下运行，研究了不同操作条件下的脱氮效果，即不同污泥停留时间（SRT）和氮负荷率（NLR）。高物质浓度和过载引起的抑制过程可以通过各种调整方法来规避。此外，还进行了厌氧氨氧化比活性 (SAA) 测试以评估铵和亚硝酸盐对厌氧氨氧化污泥的影响。经过 500 d 的 SRT，挥发性悬浮固体 (VSS) 的含量从 125 mg/L 逐渐增加到 5590 mg/L，最大脱氮率 (NRR) 达到 1.18 kg N/m3/d。当 SRT 降低到 50 d 时，污泥浓度逐渐下降，这就需要增加污泥装载率（SLR），