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Client

CRD in BC

Location

McLoughlin Point WWTP

Project Type

Year

2019

The CRD (Capital Regional District) in BC has been mandated to provide wastewater treatment to its core municipalities of Victoria, Esquimalt, Saanich, Oak Bay, View Royal, Langford and Colwood in addition to the Esquimalt and Songhees Nations. This Wastewater Treatment Project is being built to meet Provincial and Federal regulations that have been put in place.

Part of this project includes a plan to take residual solids from the McLoughlin Point WWTP and send it to the Residuals Treatment Facility at Hartland Landfill where it will be processed and turned into useable, ‘Class A’ biosolid pellets. The dried, Class A biosolids will be stored on-site and ultimately shipped to the lower mainland for use as an alternative energy source by private industrial users.

The pelletized waste is potentially combustible if not handled properly, so the CST storage silos needed to be designed with features to protect personnel and property. Two CST dry bulk silos were constructed at the plant to accommodate this need, one bulk storage silo, and one truck out-load silo. The CST silos are capable of containing the 20 tonnes of treated, dried biosolids that will be generated every day.

As working space on site was very limited, Greatario decided to take advantage of the modular CST tank design. Greatario built sections of the silos off-site then trucked them in for final placement on top of the structural supports. Being able to partially building off-site, helped the general contractor to keep the only road around the job site open and clear. This helped ensure FULL and SAFE access to the worksite for other personnel during construction.

OBJECTIVES
  • Build storage tank for Class A biosolids
  • Construct tank in limited space with tight deadline
KEY FEATURES
  • Modular tank design constructed off-site and moved in sections for final assembly
  • Glass-fused-to-steel panels reduce corrosion, ensure long life-cycle of tank