The SBR system accomplishes equalization, biological treatment and settling in a timed
sequence. A sequence consists of five main phases:
Fill React Settle Decant Idle These main phases can be divided further into sub phases depending on the treatment. The
result is a very simple and flexible system that can be adapted to the specific conditions.
In the system the reaction tank is filled with raw wastewater. During the fill phase and the
subsequent react phase, the wastewater is treated biologically. The reaction tank can perform
both nitrification and denitrification which means that the plant can offer the needed
conditions where the water is instead of pumping the water to another tank with the right
conditions. As a result, the need for an internal recirculation is eliminated.
After the biological treatment a settling phase is initiated. As the system includes internal
sedimentation, the need for an external clarifier with recirculation of sludge is also eliminated.
After sedimentation the treated water is discharged from the system before new
wastewater is admitted. As it is seen the water volume in a SBR system varies during a
We offer lamella clarifier to achieve solid-liquid separation by
directing the liquid between a series of inclined plates
called lamella. The settling surface of each plate is
equivalent to its horizontal projection. Lamellae are
normally spaced approx. 50 mm apart, with the result
that large settling surfaces are concentrated within a
relatively small floor area.
Stacking the inclined plates results in the separator
having upto ten times the clarification area of a
conventional circular settling tank occupying the same
floor space. In other words, for the same liquid flow,
the lamella clarifier would occupy 1/10th the floor area
of a conventional clarifier.