Workers spread new wood chips Aug. 6 at the site of Macomb County’s only biofilter facility, located on 15 Mile Road in Fraser.

Workers spread new wood chips Aug. 6 at the site of Macomb County’s only biofilter facility, located on 15 Mile Road in Fraser.

Photo provided by Macomb County Public Works Office


Macomb County completes refurbishment of biofilter

By: Nick Mordowanec | Fraser - Clinton Township Chronicle | Published August 12, 2019

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FRASER — The Macomb County Public Works Office recently refurbished the county’s only biofilter facility.

Located along 15 Mile Road and near Garfield Road in Fraser, the biofilter pulls sewer gas out of the 15 Mile Road sewer interceptor and runs it through a filter of wood chips. It removes corrosive gas from the pipe, thereby extending the duration of its useful life.

The biofilter is operated by the Public Works Office on behalf of the Macomb Interceptor Drain District that encompasses 11 communities throughout the county.

Public Works Office Communications Manager Dan Heaton said work on the area began in early August, with the project reaching completion Aug. 7. New wood chips were spread on Aug. 6.

“This is part of our ongoing preventative maintenance program on all of our underground and related infrastructure,” Public Works Commissioner Candice Miller stated in a press release. “It is all about an ounce of preventative maintenance being more effective than a pound of repair after the fact.”

Approximately the size of a football field, the system uses a fan to pull up to 20,000 cubic feet of air from the sewer, located about 60 feet underground.

The air is then sent to one of three beds of wood chips, with the chips remaining effective for about a four-year period until replacement is required. There are about 800 cubic yards worth of wood chips on site.

Public Works Office officials said the project cost a total of about $70,000.

“We are continuously looking at our system, inspecting our pipes and then schedule this work in a time and manner that gets the best benefit for the rate payers of this system,” Miller said.

More details are available on YouTube.

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