WarraniumSBR - Sequential Batch Reactor
The Sequential Batch Reactor (SBR) is one of the oldest forms
of sewage treatment. It is referred to as the WarraniumSBR
and is available for capacities from 10 - 50,000 m3 per day.
Either as prefabricated package plants for the smaller sizes or
using concrete tanks for the larger plants.
The simplicity of the plant is its winning feature, despite the
footprint being much larger than the MBR or SAF processes.
The complication arises in the control programme to ensure
all of the sequences, that all happen in a single tank, do so at
the correct time. These sequences are Filling, Aeration,
Settlement and Effluent Discharge.
Warranium Energy improved their decanter and now offer a
new variant of multi-weir, hydro-pneumatic decanter which is
permanently submerged thus eliminating complex weir lifting
motor/gearbox units.
The effluent decanter is the single most challenging design
aspect in an SBR plant. This is because it needs to discharge a
very large volume of water over a very short time to allow for
sufficient periods for aeration and settlement. The decanter
employs a collection weir and a scum baffle. The design of the
decanter must ensure the weir loading is within proper,
engineering design limits and this means they need to be very
long.