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.

中文翻译：

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具有铁剂量和侧流共发酵的集成膜生物反应器系统，用于增强营养物去除和回收：系统性能和微生物群落分析


开发了集成膜生物反应器 (MBR) 系统，用于增强废水处理中营养物（N 和 P）的去除和有效的 P 回收。该系统由加铁 MBR 和用于去除和回收 P 的侧流发酵以及用于去除 N 的侧流反硝化组成。废水中约98.1%的总磷(TP)通过好氧MBR中的三价铁诱导沉淀和膜过滤被去除，并且近53.4%的TP可以通过MBR污泥的厌氧发酵回收。此外，发酵罐与餐厨垃圾进行产酸共发酵，为生物反硝化提供了充足的可溶性有机物，通过侧流反硝化实现了总氮去除率91.8%。应用高通量测序对集成系统中的微生物群落进行分析，通过系统的不同组成部分鉴定出硝化、反硝化、产酸发酵和异化铁还原的重要功能细菌。