Dual membrane bioreactor processes for wastewater treatment and reuse

浸没式膜生物反应器技术由于其优异的固体分离效率，在污水处理和回用方面得到了前所未有的发展。然而，为了将沉积的颗粒从膜表面剪切掉，需要剧烈的充气，从而导致高能量消耗。该研究的目的是开发和应用新的双膜生物反应器工艺（DMBR），该工艺由两套独立的膜组件淹没在生物反应器中组成。一组膜组件用于无泡曝气，以大幅提高氧传递效率和/或为生物膜生长提供介质，而另一组膜组件用于固体分离。另一个明显的特点是，DMBR工艺可以在单个系统中创建跨生物膜的好氧和厌氧环境，允许难降解有机微污染物的共同代谢，同时最大限度地减少空气剥离造成的损失

Submerged membrane bioreactor technologies have experienced unprecedented growth in wastewater treatment and reuse because of excellent solid separation efficiency. However, vigorous sparging aeration is required in order to shear the deposited particles away from the membrane surface, resulting in high energy consumption. The purpose of the proposed study is to develop and apply new dual membrane bioreactor processes (DMBR) consisting of two separate sets of membrane modules submerged in bioreactors. One set of membrane modules is used for bubbleless aeration to drastically increase the oxygen transfer efficiency and/or provide the media for biofilm growth while another remains for solid separation. Another distinct feature is that DMBR processes can be operated to create both aerobic and anaerobic environments across the biofilm in a single system, allowing the co-metabolism of refractory organic microppolutants while minimizing their loss from air stripping