In 2000, ATS was contracted to design, supply, manufacture, install and
commission the supply and extraction system for the pre-treatment
building and inlet works for Scottish Water’s Plant at Levenmouth.
Jetflo
- ATS’s jet system was selected to tackle the skip areas to thoroughly
mix the noxious air and transport it effectively to the exhaust
systems. Air from grit classifiers, washpactors, screens and pump
chambers was also extracted.
Once
the first phase had proved a success, ATS was selected to design,
supply, manufacture, install and commission the supply and odour
exhaust systems for the sludge building, dryer room, centrifuges, DAF,
aeration tanks, sludge flotation building and blower room. Ductwork was
manufactured using a combination of GRP, PVC, aluminium and galvanised
sheet metal – materials selected for their long life and value for
money.
An underground
ductwork system with four large centrifugal fans is now responsible for
taking the air to the odour control building. Fans then discharged
through a biological filter and via a stack to the atmosphere.
The
third and final phase of the project was for the cross-site ductwork
scheme. This phase involved covering the aeration lanes, UV
disinfection tanks and other assorted storm tanks that are spread
across the site and to provide additional Odourflo, odour control
systems. Originally, large areas of the site outside the buildings were
left without odour control.
ATS’s
alliance partner Europe Environnement supplied the odour control
equipment. GRP clad uPVC ductwork was selected for the project which
also included pipe bridges across four roadways. The existing odour
control plant was extended with the addition of a new two stage
chemical scrubbing system. Two new dedicated odour control plants were
installed to treat highly odorous air from the sludge treatment
building. The first system was a three stage chemical scrubbing system
followed by carbon polishing filters to treat general air extracted
from centrifuges and general areas of the building. The second system
was a two stage chemical scrubbing system followed by a thermal
oxidation plant to treat the dryer offgas. The project was completed to
the total satisfaction of the client.
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