Our newest project...
Sludge storage tank cover replacement
The GRP odour containment cover to the Beckton Sludge Storage Tank No. 2 had suffered damaged during the operation and was in danger of failure. As the tank had to be drained and emptied for maintenance, it was decided to replace the damaged cover with a more user-friendly GRP beam and infill cover. The new design necessitated the installation of a tank strengthening kit to support the revised covered loading.
Redundant Cover Removal
Due to space restrictions on site, wit was not possible to remove the cover as a
complete assembly. The cover was supported from a scaffold gantry so that
individual covers could be removed safely.
The replacement cover was a low-profile Beam and Infill GRP cover, 22.2m diameter
c/w access platform around the inspection hatch and instrument mounting points.
This design was chosen for several reasons:
Minimal air gap – Reduces the volume of odour to be extracted and treated
Ease of installation in a confined space – Cover can be assembled on the tank
Easier tank maintenance – Infill panels can be removed leaving beams in place
This design of cover concentrates the loads at the ends of the main support beams.
To prevent the steel tank from being over stressed, the tank was fitted with a set of
steel supports to transfer the loads down into the main body of the tank walls.
New beam and infill cover fitted with Heavy Duty access platform complete
with handrail protection.
Goddards Green 2020
Corporate Engineering provided fully self-supporting Beam and Infill covers running parallel to the bridge. Due to restricted headroom below the bridge end, the rotating covers are designed such that they are connected to the half-bridge scraper and are driven by the bridge motor.
Corporate Engineering provided fully self-supporting Beam and Infill covers running parallel to the bridge. Due to restricted headroom below the bridge and coping level
the beams were modified to facilitate the fitting of flat decking panels.
This project represents all aspects of Corporate Engineering's manufacturing, designing and installation processes.
Perth in Western Australia is one of the most remote cities in the world. New water treatment works were required prior to the building of a new town 45 miles to the north of Perth. Perth in Western Australia is one of the most remote cities in the world. A new water treatment works was required prior to the building of a new town 45 miles to the north of Perth.
To provide Odour Control covers to 2 number Picket fence thickeners. Access is required around the perimeter of the tank to inspect the launder channel. Flush fitting inspection hatches were required at regular intervals. We selected a totally self-supporting Beam and Infill type cover to fit the 15.2m
diameter glass coated tanks. As access was required around the periphery of the cover, the GRP support beams were modified to create a step-over which was
highlighted in yellow.
The initial agreement was set to cover the inlet works to contain the odours below from where they could be connected to a new odour control plant. A major consideration was the regular flooding of the area. The covers would need to not only contain odour but be able to withstand flood water in excess of 2 metres depth. Working with the Client and the consultant, a solution was developed utilising an array of “flood pressure relief hatches” to balance water pressure above and below the covers.
with Southern Water and GallifordTry Infrastructure Ltd.
Odour containment covers to various tanks and chambers to reduce odour emissions from the site as part of a large housing development in the area.
Primary Settlement Tanks 2 x 20m diameter beam and infill covers
PST De-sludge chamber 2.4m dia Heavy Duty pump chamber cover
PST Collection chamber 2.5m x 2.5m Heavy Duty cover
Anoxic Distribution chamber 4.0m x 2.7m Heavy Duty cover
Sludge Reception Tank 6.3m dia Beam and Infill cover
Sludge Hopper Pump Hatches 2 no. 4.0m x 1.2m hinged covers
Inlet Works Refurbishment of existing covers and addition of a large GRP enclosure to the Inlet Chamber
Prior to the project, the PSTs were fitted with conventional rotating half-bridge scrapers. These were replaced with fixed half-bridges to allow fixed GRP covers to be fitted underneath. Fixed GRB covers were chosen as they were considered to be less complex and more robust than rotating designs. Operations, such as launder and scum-box cleaning, are easier to carry out with a fixed cover design.
The beam and infill covers have a low profile and were designed to fit under the GMS bridges. The bridges were then isolated from the corrosive atmosphere created by the tank contents.
Covers were fitted with Heavy Duty platforms and walkways with GMS handrailing to allow operations personnel to access the peripheral launder, scumbox and central diffusion drum.
PST De-sludge chamber
The GRP de-sludge chamber cover replaced GMS open mesh decking to create an odour seal. The cover incorporated a large hatch to allow the deployment of the submersible pumps. The cover was designed to fit around existing penstocks, valves and davit socket.
Sludge Reception Tank
The circular GRP beam and infill cover was required to replace a failed pitched cover. The new cover was designed to incorporate the inspection hatch and sensor mounting flanges that were fitted to the original cover but were difficult for the site personnel to access safely. This necessitated the supply and installation of a new GMS access platform that was also part of Corporate Engineering’s scope of supply.
Pump Removal Hatches
The client needed weatherproof covers over apertures in a concrete slab that were used to remove large pumps from a dry-well. The covers consisted of lightweight hinged panels mounted on a GRP upstand that were easily operated from behind the safety handrailing.
As well as general repair and refurbishment of the existing GRP odour covers, CEL were asked to provide a suitable cover to the inlet chamber that could accommodate large effluent plumes emitted from the inlet bell mouths during pumping operations. CEL’s solution was to design a removable enclosure that provided additional headroom for the plumes that had damaged the original low-level cover panels.
Sludge Reception Tank
Pump Removal Hatches
Pump Removal Hatches