| One the
country's largest "advanced waste water treatment
plants" elected to use Drum Screens for the final
process. The plant is located in the Southeast and is
being expanded in reaction to the swelling population.
The existing plant has the ability to treat 20 MGD and
is being expanded to handle 60 MGD with the final effluent
being essentially equal to potable water.
Drum Screens were specifically chosen
for several distinct reasons including the complete
elimination of debris carry over, the extremely high
mechanical reliability and the seal patter to eliminate
debris by passing. Other types of screens reviewed could
potentially allow debris to by pass the screens thus
either damaging or interfering with the membrane process.
The Drum Screens will be of the Double
Entry Single Exit type where the influent enters the
drum on either side and the effluent must exit through
the screen. Each drum screen is designed to pass 50
MGD with screen aperture of zero point five millimeter
(0.5 mm). The drums will be constructed of mainly 316
stainless steel with polyester mesh for corrosion resistance.
The existing plant already has 3 of 7
Brackett Green CF 200® Fine Band Screens in operation
(5mm screening) and we also have numerous drum screens
operating within 50 miles so it was a natural for the
design team to turn to us for the ultra fine filtration
requirements to suit the membrane. |
