MBR plants are a combination of a biological treatment stage and a subsequent filtration unit, such as the HUBER Membrane Filtration VRM®. This combination eliminates the need for conventional secondary clarification in a settling tank. The combined process is called "membrane bioreactor" (MBR).
We use the unique BIO-CEL® membrane laminate of MICRODYN-NADIR for our HUBER Membrane Filtration VRM® units.
In contrast to real plate membranes the membrane laminates are not welded onto a carrier plate but laminated onto a spacer fabric (see photo) and then tight welded to obtain trapezoidal membrane modules.
The high-quality BIO-CEL® modules of MICRODYN-NADIR excel for their long life and are inexpensive to clean. As ultrafiltration membranes they guarantee excellent effluent quality.
In contrast to conventional flat membrane modules BIOCEL® membrane modules can be backwashed like hollow fibre modules but are hardly susceptible to blockage.
Rotating Air Boost – energy-efficient, intensive membrane cleaning
To prevent the formation of covering layers on the membrane, a powerful cross flow with high turbulences is generated on the membrane surfaces by introducing air. The HUBER Membrane Filtration VRM® uses a unique and highly energy-efficient cleaning method for this purpose: the rotating air boost.
The trapezoidal membrane segments slowly rotate (at 1 rpm) around a centrally arranged air distributor. One after the other, the segments are exposed to the powerful air stream. Fouling and particles are removed effectively and reliably.
Compared to static plate systems the air can be blown in at only half the depth required otherwise and also only half the scouring air flow is necessary. As a result, total energy consumption of large VRM® units can be reduced to below 100 Wh/m³.