CENTRE WELLINGTON – The Township is pleased to announce that the Fergus Wastewater Treatment Plant Secondary Digester Roof Replacement Project is complete, and the secondary digester is now back in service.
The secondary digester is used to contain and treat wastewater sludge.
The digested sludge is also known as “biosolids” which contains essential plant nutrients and organic matter that is used as soil fertilizer.
The digestion of sludge creates methane gas as a by-product which is captured and stored by the new digester roof and then used as a heating fuel for the wastewater treatment plant. The result provides both environmental and economic benefit to the township.
The roof replacement project is a significant achievement which included the removal of the old fiberglass roof and the installation of a new 50’ (15.3m) diameter stainless steel floating gasholder roof.
The digester’s original roof was 30 years old, in poor condition, and needed to be replaced. The new stainless-steel roof will help minimize life-cycle costs due to the long service life and minimal maintenance needed for stainless steel.
The project team includes:
– Jacobs, serving as the township’s engineering consultants;
– Glover-Hill, the design builder who worked in conjunction with roof designer/manufacturer WesTech;
– project engineers CIMA; and
– Ayr Welding, the roof installation subcontractor.
The township also recognizes the contributions of wastewater services operators, who managed the treatment process to avoid any costly off-site waste disposal, and environmental services staff who worked together with the design-build team for the successful completion of this important project.
