MYNORTHWEST NEWS

‘It does not smell’: Wash. program to use sewage to keep businesses warm

Oct 31, 2023, 8:36 AM

Sewage...

View of the Everett Water Pollution Control Facility is a wastewater treatment plant in Everett, Washington, United States. (Photo by Wolfgang Kaehler/LightRocket via Getty Images)

(Photo by Wolfgang Kaehler/LightRocket via Getty Images)

King County is about to heat things up on a pilot program that will use sewage to keep businesses warm this winter.

The county’s first customer, a real estate equities company in South Lake Union, is keeping their 1.6 million-square-foot campus warm using heat from sewage.

It works because the sewage pipe transfers heat to the building’s pipes but the two never mix.

More Washington news: City of Tacoma announces immediate closure of bridge for safety concerns

“It does not smell,” Erika Kinno from King County Waste Management told KIRO Newsradio. “The system is completely sealed, so when it is up and operational, you should not smell it at all. If you were in a building that is being heated by wastewater, you shouldn’t have a clue at all.”

Warm and hot wastewater flushed from homes and businesses is a significant energy source. The U.S. Department of Energy estimated that 350 billion kilowatt-hours of heat energy are flushed down the drains in the United States every year — roughly enough to power 30 million homes.

“The Wastewater Treatment Division is the first in Washington state and one of the first wastewater utilities in the nation to offer sewer heat recovery (SHR),” King County’s website reads. “Private commercial property owners and developers can recover heat energy from our sewer pipes for heating or cooling their buildings. SHR technology is fairly common in Europe and parts of Canada, but standardized SHR use agreements are pioneering in the U.S.”

This technology captures a portion of wastewater in an underground holding tank, transferring its heat energy to a heat exchanger. This allows a heat pump to extract that energy and transport it to a connected building’s domestic hot water or heating or cooling system.

Related news: WM invests $56 million on new recycling technology in Washington

Repurposing this otherwise wasted heat energy resource is another way building owners can meet sustainability goals and positively contribute to climate action.

The county said sewage is a great source of renewable energy, one that they don’t want to go to waste.

MyNorthwest News

Sen. Marko Liias...

Jason Rantz

Rantz: Washington Democrat exposed for lying about carbon tax, I-2117

Senator Marko Liias flat-out lied about the Washington I-2771 carbon tax repeal while using his official government account.

7 hours ago

ufo, uap...

Micki Gamez

Washington continues to be a UFO hot spot

Seattle has become a hot spot for UFO sightings, with 86.5 sightings per 100,000 residents annually between 2000 and 2023.

7 hours ago

Image: Police detectives in Tacoma are asking for the public's help to identify the suspect respons...

James Lynch

Tacoma police search for suspect as stabbing victim tells her story

A Pierce County woman who was nearly stabbed to death in Tacoma’s Point Defiance Park is telling her story of a vicious attack and fight for her life.

8 hours ago

The Washington State Cougars take the field against the Oregon State Beavers at Martin Stadium on O...

Matt Markovich

Lawmakers hear dire circumstances of WSU being ‘Couged’ by former Pac-12 schools

The University of Washington’s departure from the Pac-12 Conference has created financial uncertainty for Washington State University (WSU).

8 hours ago

Image: Police detectives in Tacoma are asking for the public's help to identify the suspect respons...

Steve Coogan and Bill Kaczaraba, MyNorthwest

Woman stabbed in Point Defiance crime: ‘I can’t believe I survived’

On Feb. 10, the victim was walking at Point Defiance Park when was attacked by an unknown man, the Tacoma Police Department reported.

9 hours ago

FILE - Seattle Seahawks running back Marshawn Lynch walks off the field after NFL football practice...

The Associated Press

Marshawn Lynch to pay a fine, attend DUI traffic school, but no conviction

Former Seattle Seahawks running back Marshawn Lynch resolved a drunken driving case without a trial or DUI conviction Wednesday, 18 months after police found him asleep in the driver’s seat of a damaged luxury sports car in Las Vegas.

9 hours ago

‘It does not smell’: Wash. program to use sewage to keep businesses warm