Does it cost more or less to build an MBR plant as compared to say an SBR, a ditch or a conventional activated sludge plant?

Of 41 Ovivo®MBRs surveyed, larger than 0.5 MGD, the average total installed cost was less than $9/gal and 49% cost less than $8/gal to build. MBR now routinely pencils out to be competitive with conventional technologies even with less stringent effluent requirements and in the case where footprint is not a driver.