Nitrogen removal is crucial in wastewater treatment process as excessive nitrogen content could result in eutrophication and degradation of aquatic ecosystems. Moreover, to satisfy the fast-growing need of fertilizers due to an increase in human population, recovering nitrogen from wastewater is of the most sustainable approach. Currently, the membrane technique integrated with biological processes namely bio-membrane based integrated system (BMIS) is a promising technology for recovering nitrogen from wastewater, including osmotic membrane bioreactors, bioelectrochemical systems and membrane photobioreactors. In this review study, the nitrogen recovery in different BMHSs, the role of operational parameters and the nitrogen recovery mechanism were discussed. Apart from this, the implementation of nitrogen recovery at pilot- and full-scale was summarized. Perspectives on the major challenges and recommendations of the BMIS for the nitrogen recovery in wastewater treatment were proposed, in which the integrated technologies and more scale-up studies regarding nitrogen recovery by the BMISs were also highlighted and recommended.

除氮在废水处理过程中至关重要，因为过多的氮含量可能导致水体生态系统富营养化和退化。此外，为了满足由于人口增加而导致的快速增长的肥料需求，从废水中回收氮是最可持续的方法。当前，与生物过程集成的膜技术，即基于生物膜的集成系统（BMIS），是一种从废水中回收氮的有前途的技术，废水包括渗透膜生物反应器，生物电化学系统和膜光生物反应器。在这项综述研究中，讨论了不同BMHS中的氮回收，操作参数的作用和氮回收机理。除此之外，总结了中试和全规模氮回收的实施情况。提出了有关BMIS在废水处理中氮回收方面的主要挑战和建议的观点，并着重介绍了BMIS的综合技术和有关氮回收的更多研究。