Dual membrane bioreactor processes for wastewater treatment and reuse

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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