Hydrok built FOG tanks head North from Cornwall

Hydrok were commissioned to design and manufacture two bespoke FOG reception basins for a new Bio-oil processing plant at Ellesmere Port in the Wirral. The plant will be recycling Fats, Oil and Grease from around the UK to create a usable bio-fuel. The process requires heating the FOG to 85 degrees Celsius to melt the reclaimed material, with screw pumps transporting the melted liquid to the next stage of the processing.

Hydrok built FOG tanks head North from Cornwall

Hydrok manufactured two tanks constructed from stainless steel, the design was progressed to minimise cost of fabrication by using 4mm 304 stainless steel sheets which are panted (folded) for strength & stability. To prevent solids building up on the panting the sloped sections in the base was panted vertically with the horizontal side panting sloped at 60°. Each tank incorporates a screw pump set at a 42° incline and each tank has a total working volume of 92m³, a final drain is fitted at the bottom of each tank as a draw off connection. The overall size for each tank is 10m long 6.1m high 4.2m wide and weighs approximately 10 tonnes. The overall dimensions were designed to minimise transportation costs whist achieving the required volumes, strength and support. A finite element analysis for structural integrity was carried out with a Hydrostatic water test and visual inspection of the completed tanks.

David Armstrong, Managing Director of Hydrok said “Hydrok specialise in the construction of large stainless steel vessels, predominantly for the UK Water Industry where off site construction of chambers such as these is becoming a regular requirement to assist in minimising the site construction time, safety hazards and disruption. We were delighted to have been able to work on this prestigious environmental project and produce what are the largest chambers Hydrok have manufactured to date. Our location within the South West of England and the direct road network via the major trunk roads up to the Wirral allowed for the direct uninterrupted delivery of these two tanks from door to door which was also recognised as a huge advantage when planning this project.”

The completed tanks were transported overnight from the Hydrok manufacturing facility in Cornwall to Ellesmere Port on two flat bed lorries with escort in order to minimise road disruption. Hydrok installation teams completed the project and ran final operational tests.


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