Membrane Activated Sludge (IMAS)
membrane fouling rates
IMAS process maintains separate biological
and membrane unit processes, allowing for
maximum total system performance to be achieved.
Each process is individually controlled
and optimized, without the many compromises
dictated by conventional MBR direct membrane
IMAS MLSS particles both settle well and
characteristically exhibit a low membrane
settling characteristics enable pre-membrane
particle management to efficiently and effectively
remove membrane foulants and reduce the
level of MLSS to the membrane by 97+%. This
significant reduction in the concentration
of foulants directly increases the membrane
flux, lowering the membrane area required
and minimizing capital and operating costs.
IMAS Particle Management- The Key to Optimizing
Membrane Performance Particle management
reduces both the concentration of foulants
and their chemical and physical ability
to foul the membrane.
size (surface area / mass) management
particles inherently have a lower surface
area / mass ratio. This minimizes the particle
/ membrane surface area contact rate, effectively
reducing the membrane fouling rate.
foulants commonly found in a biological
process such as colloidal and inert materials
and organics are bound within the larger
particles. These bound foulants are shielded
from the membrane and reduce the fouling
high rate gravity settling process efficiently
reduces the MLSS by 95+%, removing foulants
such as colloidal material, extracellular
polysaccharides and organics from the process
prior to the membrane. While substantially
reducing the membrane fouling rate, the
particle reduction step occupies much less
space than a conventional activated sludge
flux rates Minimizing overall membrane fouling
rates by individually optimizing the biological
and membrane processes results in an operating
flux rate which is much higher than a conventional
MBR design. Less membrane equals lower costs.
combination of ultra low transmembrane pressure
operation and particle management minimizes
membrane fouling, resulting in IMAS being
the most energy efficient combination of
biological and membrane processes available.
low operating pressure
immersed, pump suction driven design operates
at a maximum of -10 psi.
contacct ForeverPure for detailed information.