As clean-water plants strive to become resource recovery facilities, energy neutrality is a key goal. There are two components to get there: using less energy (through efficiency) and producing more energy (by using biogas).An example of the first component is ZeeLung membrane aerated biofilm reactor (MABR) technology from GE Power & Water. The system is designed to use oxygen much more efficiently than conventional fine-bubble aeration in the activated sludge process.The technology transfers oxygen by diffusion through a membrane to a biofilm that grows on the outside membrane surface. The microorganisms in the biofilm then metabolize the nutrients and organic
