膜生物反应器(MBR)工艺是膜分离技术与生物技术有机结合的新型废水处理技术。它利用膜分离设备将生化反应池中的活性污泥和大分子有机物质截留住，省掉二沉池。活性污泥浓度因此大大提高，水力停留时间(HRT)和污泥停留时间(SRT)可以分别控制，而难降解的物质在反应器中不断反应、降解。
Membrane bioreactor (MBR) is a new wastewater treatment technology which combines membrane separation technology and biotechnology. It uses the membrane separation equipment to intercept and retain the activated sludge and macromolecular organic matter in the biochemical reaction tank, thus eliminating the secondary sedimentation tank. As a result, the concentration of activated sludge is greatly increased. HRT and SRT can be controlled respectively, while the refractory substances are continuously reacted and degraded in the reactor.
因此，膜生物反应器(MBR)工艺通过膜分离技术大大强化了生物反应器的功能。与传统的生物处理方法相比，是目前最有前途的废水处理新技术之一。
Therefore, the membrane bioreactor (MBR) process greatly enhances the function of the bioreactor through membrane separation technology. Compared with the traditional biological treatment method, it is one of the most promising new wastewater treatment technologies.