The promising sustainability and potential in carbon neutrality of the anaerobic membrane bioreactor (AnMBR) integrated with partial nitritation-anammox (PN/A) was assessed using a large pilot-scale plant. The entire pilot-scale system was conducted for a long-term continuous operation of 217 days, succeeding in the effective carbon-neutral treatment of low-strength real municipal wastewater with excellent COD removal efficiency of higher than 90 %. The major proportion of the organic matter was converted into bio-methane which can be recovered as bio-energy or bio-fuel. The residual ammonium contained in the digestate effluent of the AnMBR was further treated by a pilot-scale one-stage PN/A reactor. The long-term operation of the pilot-scale AnMBR was compared with the empirical assumption of the anaerobic-anoxic-oxic (A²/O) process, exhibiting splendid feasibilities in both ecological and economical perspectives including energy conservation and recovery, reduction of CO₂ emission and electricity expenditure saving for municipal wastewater treatment. The application of AnMBR-PN/A process helps reducing the energy consumption of 0.416 kWh/m³ during the wastewater treatment process engineering of municipal wastewater, accounting for 90 % of that for the A²/O. The AnMBR-PN/A is also capable of reducing the CO₂ emission reduced by 74.9 %. A full-scale wastewater treatment plant implemented with the AnMBR-PN/A process could save the electricity expenditure by 0.80 million CNY annually. The results of this work are solid evidence that the AnMBR-PN/A process is a remarkable sustainable technology, also giving new insights into the concept of carbon-neutral treatment of municipal wastewater in future studies.

使用大型中试工厂评估了与部分亚硝化-厌氧氨氧化 (PN/A) 相结合的厌氧膜生物反应器 (AnMBR) 的可持续性和碳中和潜力。整个中试系统长期连续运行217天，成功实现了低强度真实城市污水的有效碳中和处理，COD去除率高达90%以上。大部分有机物转化为生物甲烷，可作为生物能源或生物燃料进行回收。AnMBR 的沼渣流出物中含有的残留铵通过中试规模的一级 PN/A 反应器进一步处理。将中试规模 AnMBR 的长期运行与厌氧-缺氧-好氧 (A ²_{/O)工艺，在城市污水处理中的节能回收、减少CO 2}排放和节省电费等生态和经济方面均具有很好的可行性。应用AnMBR-PN/A工艺，市政污水污水处理工艺工程能耗降低0.416 kWh/m ³，占A ² /O能耗的90%。AnMBR-PN/A 还能够减少 CO ₂排放量减少了 74.9%。采用 AnMBR-PN/A 工艺的全规模污水处理厂每年可节省电费 80 万元。这项工作的结果有力地证明了 AnMBR-PN/A 工艺是一项非凡的可持续技术，也为未来研究中城市废水的碳中和处理概念提供了新的见解。