Kubota Membrane Design Advantages
Compact plan
Membrane bioreactors have a number of
inherent advantages. The system does not require flocs to
be formed to remove the solids by sedimentation and therefore
the biomass can operate at very high levels of Mixed Liquor
Suspended Solids (MLSS), generally in order of 10,000-18,000
mg/L. This high concentration of MLSS allows for a small
tank volume and the generation of a long sludge age. This
reduces sludge volume, which allows for a small plant footprint
and a 50% reduction in aeration tank volume.
Easy maintenance control
The process is designed to run without
supervision and by using high quality plastics and stainless
steel, the membrane panels and cases have long life expectancies.
By minimizing the effect of fouling through controlled cross
flow velocities over the membrane surface, insitu, membrane
cleaning is normally restricted to twice a year.
Less excess sludge production
The long sludge age process produces less
surplus sludge than conventional treatment processes. Hence,
sludge handling and disposal costs are reduced and the sludge
is highly stabilized.
Reliable quality of treated water
because of membrane separation.
Because of the small pore size of
the membrane (0.1-micros effective pore size)
bacteria and most viruses are removed by the process.
High quality of treated water is reliably achieved.
Turbidity of the effluent is less
than 0.2 NTU and suspended solids are less than 3mg/l. |
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Kubota Membrane design features
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The submerged unit comprises cartridges
with fine porous membranes fixed to both sides of a
supporting plate and tubes for removing treated water
from the cartridges. |
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The membrane case can store a large number of membrane
cartridges, as well as diffusers and a diffuser case
in the lower portion. |
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The membrane cartridges can be removed one by one
for easy inspection and replacement. |
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Gravity flow system, no requirement for vacuum abstraction.
A negative pressure system is available. |
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Robust design and minimal operator intervention. |
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Low requirement for regular cleaning – typically
twice yearly only. |
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No pulsed backwash system required. |
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Not clogged by hairs or fibres. |
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Rigid design prevents damage through fatigue –
membranes do not abrade each other. |
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Modular designs for easy upgrade. |
Main applications for the Kubota system.
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Solid-liquid separation for high concentration
activated sludge treatment. |
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Domestic and Municipal wastewater treatment. |
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Wastewater effluent reuse systems. |
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High quality treatment for sensitive areas. |
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Industrial wastewater treatment and recycle. |
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