The biological reactor works similarly to that of the biological plants but with a higher mixedliquor suspended solids (MLSS) concentration. The MBR relies on submerged membranes rather than clarifiers, eliminating sludge‐settling issues. This allows the biological process in an MBR to operate at longer sludge ages and to increase mixed‐liquor suspended solids (MLSS) concentrations, which leads to a better biological performance, less space requirements, and less sludge generation comparing to a conventional biological plant.
Membrane bio‐reactors are capable of meeting the most stringent effluent water quality standards, with no need to dose chemical products of any kind (flocculants, coagulants or oxidants). In fact, membranes are capable of removing suspended solids and even most bacteriae, to a level unreachable for a conventional biological system. The membrane used in DETEGASA MBR plants is the hollow fiber Mitsubishi‐Rayon SteraporeTM SUR membrane, with a 0.4 micron nominal pore size.
- Smaller dimensions comparing to a biological plant.
- Less complex design comparing to a physical chemical plant.
- High quality effluent standards.
- No need to dose chemical coagulants, flocculants and desinfectants (sodium hypochlorite).
- Highly reduced sludge production comparing to a traditional biological or physical chemical plant.
- No odour emissions due to biological process.