An integrated membrane bioreactor (MBR) system was developed for enhanced nutrient (N and P) removal and effective P recovery in wastewater treatment. The system consisted of an iron-dosing MBR and side-stream fermentation for P removal and recovery and side-stream denitrification for N removal. Around 98.1% of the total phosphorus (TP) in wastewater was removed by ferric iron-induced precipitation and membrane filtration in the aerobic MBR, and nearly 53.4% of the TP could be recovered via anaerobic fermentation from the MBR sludge. In addition, the fermenter that allowed acidogenic co-fermentation with food waste provided sufficient soluble organics for biological denitrification, and an overall 91.8% total N removal was achieved through the side-stream denitrification. High-throughput sequencing was applied to analyse the microbial communities in the integrated system, and important functional bacteria were identified for nitrification, denitrification, acidogenic fermentation and dissimilatory iron reduction through the different components of the system.

开发了集成膜生物反应器（MBR）系统，以提高废水处理中的营养素（N和P）去除率和有效的P回收率。该系统由一个供铁的MBR和用于P去除和回收的侧流发酵以及用于N去除的侧流反硝化组成。在好氧的MBR中，铁的沉淀和膜过滤去除了废水中总磷（TP）的约98.1％，通过厌氧发酵可从MBR污泥中回收近TP的53.4％。此外，允许与食物残渣进行产酸共发酵的发酵罐为生物反硝化提供了足够的可溶性有机物，并且通过侧流反硝化实现了91.8％的总氮去除率。