| The Howden SBR (Submerged Biological Reactor) combines
key features of fixed film and extended aeration reactors in a very
effective yet simple design. The range is ideally for customers, such
as small communities, caravan parks, works sites, etc, requiring a
high standard of treatment from a process which is particularly easy
to manage and maintain. Primary zones in a SBR retain settleable
solids in sewage and recycled sludge liquor, and also trap floating
contaminants (rags, bags, fats, grease, etc). This eliminates the
need for inlet works or screening equipment. Biological treatment
is well catered for in a two pass down flow and up flow aerated
media reactor system. These twin reactors provide an extensive surface
area for growth of biomass which is essential to the process. Biomass
is established and supported by oxygen in air which is introduced
via diffusers. The selection of high voidage media and appropriate
air distribution components ensures the system remains free of any
blockage.
Clarification is achieved in a settling zone where sludge is induced
to concentrate in a hopper base allowing clear liquor to rise to
a surface collection system. The sludge liquor is recycled on timer
controlled airlift back to the primary zones. A sterilization/contact
tank completes the treatment process.
The SBR is designed to run with just on to rotating assembly –
a blower set which provides air for reactors and also for the airlift.
The blower and controls are located externally for easy access and
diffusers can be checked and even handled without stopping the process.
Final effluent quality is in line with standards as generally sought
by local and international authorities |
