The MBR Blog
A very recent analysis courtesy of Ecologix in Taiwan deconstructed the MBR technology of a small-scale plant into its constituent parts. When the components of MBR technology were considered, it is the membrane which makes up the lion’s share of the capital cost.
There doesn't appear to be a single aspect or component of MBR technology that has not been declared innovative by someone: the membrane material, membrane module, membrane aeration, frame, overall design − you name it, somebody somewhere has innovated it.
The internet is awash with pie charts demonstrating that 50−55% of energy costs at a classical municipal WWTW are associated with aeration. The percentage is slightly larger for MBRs because of the requirement for membrane air scouring as well as process aeration.
The factors governing implementation of an MBR (or any other technology, for that matter) can largely be reduced to a single parameter: money. So here's a list of the top 10 key factors to take into consideration when implementing an MBR.