One-dimensional multispecies model on membrane-aerated biofilm (MAB) containing ammonia-oxidizing archaea (AOA), nitrite-oxidizing bacteria (NOB) and heterotrophic bacteria (HB), the initial fraction of which were 55%, 15% and 30%, respectively, was successfully developed and simulated by AQUASIM 2.1 to comprehend effects of temperature, aeration pressure and influent COD/N ratio on the nitrogen removal performance for the wastewater treatment of low-leveled ammonia nitrogen (5 gN/m³). Results indicated that it’s applicable to decrease the aeration pressure for inhibiting the NOB activity and maintaining the total nitrogen (TN) removal efficiency under higher temperatures. Microbial distribution inside the MAB revealed that through moderately increasing the COD/N ratio at 293 K and the aeration pressure of 0.1 atm, the oxygen competition among AOA, NOB and aerobic HB could be better balanced with TN removal efficiency improved, demonstrating the feasibility of simultaneous nitrification and denitrification via nitrite. It’s been evaluated that with increased aeration pressures, higher TN removal efficiency could be achieved through the short-cut denitrification by improving the COD/N ratio to enhance the outperformance of aerobic HB over NOB for oxygen while substantially maintaining the AOA activity. And the denitrification process could be better performed in the biofilm adjacent to the bulk liquid by anaerobic HB utilizing soluble organics from the hydrolysis of slowly-degradable particulates to reduce the nitrite. The simulation results would be of great importance for the design, operation and optimization of AOA-dominating MAB applied in the nitrogen removal from micro-polluted wastewater.

包含氨氧化古细菌（AOA），亚硝酸盐氧化细菌（NOB）和异养细菌（HB）的膜充气生物膜（MAB）的一维多物种模型，其初始分数分别为55％，15％和30％分别通过AQUASIM 2.1成功开发和模拟，以了解温度，曝气压力和进水COD / N比对低水平氨氮（5 gN / m ^3）废水处理中脱氮性能的影响）。结果表明，在较高温度下，降低曝气压力可抑制NOB活性并保持总氮（TN）去除效率是适用的。MAB内部的微生物分布表明，通过适度提高293 K时的COD / N比和0.1 atm的曝气压力，可以更好地平衡AOA，NOB和有氧HB之间的氧竞争，同时改善TN去除效率，证明了该方法的可行性。通过亚硝酸盐同时硝化和反硝化。据评估，随着曝气压力的增加，通过改善COD / N比值来提高有氧HB的性能优于NOB的氧气，同时基本保持AOA活性，通过短程反硝化可以实现更高的TN去除效率。利用厌氧乙肝，利用可缓慢降解的颗粒水解产生的可溶性有机物还原亚硝酸盐，可以在与大块液体相邻的生物膜中更好地进行反硝化过程。该模拟结果对于设计，操作和优化以AOA为主的MAB在微污染废水脱氮中的应用具有重要意义。