Cover placed over clarifier at Amherstburg water treatment plant

 

 

By Ron Giofu

 

The town’s water supply has one more layer of protection and the large crane that was at the site last Wednesday helped make that happen.

A new cover, which resembles a small dome, was placed over the clarifier at the Amherstburg Area Water Treatment Plant. Todd Hewitt, the town’s manager of engineering and operations, said the town is complying with a recommendation from the Ontario Ministry of the Environment.

A large crane gets ready to lift and place a cover onto the clarifier at the Amherstburg Area Water Treatment Plant Wednesday morning.

A large crane gets ready to lift and place a cover onto the clarifier at the Amherstburg Area Water Treatment Plant Wednesday morning.

“A few years ago, the MoE identified in one of their inspections that the clarifier should have a cover and shouldn’t be open to the elements,” said Hewitt.

The project was approved in the 2015 capital budget with the engineering request for proposals (RFP) being issued in late 2015. The total cost of the project will cost $415,000, Hewitt said.

While the cover was lifted into place Wednesday, there is still more work to be done including putting up side panels around the cover. The remaining work will still take a few more weeks to complete, added Hewitt, who stated it should be finished by the end of April at the latest.

The weight of the clarifier cover that was lifted into place Wednesday morning was approximately 15,000 lbs.

Dan Rawlins, operations manager of the Essex Hub of the Ontario Clean Water Agency (OCWA), pointed out that the clarifier is a major part of the treatment process and that the cover will help with the overall performance of the water treatment plant.

The clarifier was prone to algae growth in the summer and freezing in the winter with the cover expected to reduce those types of things from happening. Hewitt noted that debris and dust could have previously found its way into the clarifier.

“Any contaminants we can keep out of it makes the process better,” he said. “You wouldn’t see a clarifier built without a cover now.”

The new 15,000-pound cover is placed on the clarifier at the Amherstburg Area Water Treatment Plant March 30.

The new 15,000-pound cover is placed on the clarifier at the Amherstburg Area Water Treatment Plant March 30.

The Amherstburg water treatment plant is roughly 45-years-old.

Rawlins explained that water that is brought in from the Detroit River is screened to remove the large particles before going to the clarifier. From there, the water is introduced to a chemical to help with the coagulation, flocculation and sedimentation in the clarifier.  The settled particles are pumped out and the water then gets chlorinated and filtered. From there, it’s stored in the reservoir and then used in the distribution system.

The cover on the clarifier will help with operational challenges due to the changing seasons and provide more protection and security to the treatment process,” said Rawlins.

“It’s a great way to protect the process,” added Hewitt, of the new cover.

Materials for the cover, which Hewitt stated is largely made of aluminum, were delivered to the site the previous Friday. It was built on site before being lifted onto the clarifier.

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