Water Corporation, 629 Newcastle St, Leederville, WA 6007, Australia E-mail:
Faculty of Science and Engineering, Curtin University, Kent St, Bentley, WA 6102, Australia.
Water Sci Technol. 2022 Feb;85(4):1155-1166. doi: 10.2166/wst.2022.045.
A 630 m/d pilot plant was installed at Subiaco WRRF to determine design and operational parameters of a hybrid Modified Ludzack-Ettinger - Membrane Aerated Biofilm Reactor (MLE-MABR) configuration. Two commercial ZeeLung MABR cassettes were installed in series in the anoxic zone and the pilot was fed with primary effluent (averaging COD 601 mg/L, TKN 68.5 mg/L and 17-29 °C). A nitrifying biofilm was developed within 3 weeks and the nitrous oxide (NO) gas emissions from the MABR exhaust gas proved to be a reliable parameter to assess biofilm development. Both MABRs achieved the average nitrification rate (NR) of 3.7 gNH-N/m.d when air flow was 8.6 and 11.2 Nm/h to MABR1 and MABR2 respectively, which reached a maximum oxygen transfer rate of 17.4 gO/m.d. Biofilm thickness was controlled via air scouring and intermittent coarse bubble mixing (90 s on/90 s off). This paper discusses the startup strategy, minimum requirements for process monitoring, impact of different air flow conditions, ORP and mixing patterns on performance efficiency over a 22-week period.
在苏比亚科污水处理厂建立了一个 630 立方米/天的中试工厂，以确定混合式改良 Ludzack-Ettinger-膜曝气生物膜反应器（MLE-MABR）构型的设计和运行参数。两个商业 ZeeLung MABR 模块串联安装在缺氧区，中试工厂以原水（平均 COD 601mg/L、TKN 68.5mg/L 和 17-29°C）为进水。在 3 周内形成了硝化生物膜，并且 MABR 尾气中的氧化亚氮（NO）气体排放被证明是评估生物膜发展的可靠参数。当空气流量分别为 8.6 和 11.2 Nm/h 时，两个 MABR 分别达到了 3.7 gNH-N/m.d 的平均硝化速率（NR），达到了 17.4 gO/m.d 的最大氧转移速率。通过空气冲刷和间歇粗气泡混合（90s ON/90s OFF）来控制生物膜厚度。本文讨论了启动策略、过程监测的最低要求、不同空气流量条件、ORP 和混合模式对 22 周内性能效率的影响。
