Standard features of A&J Fabtech suction
the unique site geometry and a total of 32
two removable working platforms which
lift scrapers include an automatic greasing
scum removal systems were installed on
provided safe access to the working area
system for the slew-ring bearing; loss of
the submerged rotating truss structures,
– as well as reducing scaffold costs and
motion detection, over-torque protection
thus concentrating surface scum towards
speeding up time to completion. As the
and loss of suction or blockage detection
new dipping scumboxes and outlet pipes.
final detail of the project A&J Fabtech
to protect the core scraper functions.
A&J Fabtech usually delivers its scrapers
with all on-bridge equipment pre-wired
to reduce the need for on-site work. As
with all of A&J Fabtech equipment, suction
lift scrapers can be adapted to suit the
specific requirements of the site by the
use of bespoke designs or the addition of
optional features such as electrical control
equipment, launder cleaning systems,
scum control systems and in-tank baffles
and diffusers.
Another element of the
Crossness project was the
automation of the aeration
lanes launder trough through
the addition of two activated
sludge tank flow-regulating
outlet launderers to the existing
sixteen activated sludge plant
aeration lanes. The launders selfregulate using electric actuators to
match the outgoing flow rate.
fabricated six galvanised motor control
centre support frameworks.
These were located above cable pits at
various locations associated with large
motor control centres or LV/HV (low
voltage/high voltage) power distribution
panels.
Since the completion of the project A&J
Fabtech has been presented with the
Tamesis "Shining Contractor Award" and
has received a Letter of Commendation
However, a risk assessment showed that
from Thames Water for the development
A&J Fabtech was also able to provide a
the need to access the aeration lane floor
and implementation of improved working
bespoke retrofit scum removal solution
during the construction phase would
practices that also delivered tangible cost
to solve issues that were specific to the
have major health and safety implications
savings.
site's existing final settlement tank fixed
for both the scaffold teams and site
full-bridge scrapers. Its proven scum
engineering team. To overcome these
removal technology was adapted to meet
A&J Fabtech designed and manufactured
www.ajfabtech.com
A&J Fabtech has been commended
for developing a new safer, quicker
and lower cost method of installing
rotating full-bridge suction lift
scrapers, a procedure it used when
working on Thames Water's London
Tideway Improvement scheme.