The Port of Seattle is set to make Seattle-Tacoma (Sea-Tac) International Airport the first in the US to be heated completely by renewable biomethane.

The Port has solicited proposals to supply biomethane to Sea-Tac Airport’s boilers and bus fuelling systems that account for more than 80% of the Port-owned emissions.

The fuel is produced by the decomposition of organic matter.

“The port can play a major role in creating a renewable natural gas market because we offer a stable, long-term use of gas.”

Port of Seattle aviation environment and sustainability director Arlyn Purcell said: “The Port can play a major role in creating a renewable natural gas market because we offer a stable, long-term use of gas.

“If we can attract a project developer to supply the airport, this will spur more opportunities to feed the current gas pipeline with RNG rather than have landfills or digesters flare the gas on-site or allowing their methane emissions to escape into the air.”

The Port of Seattle has adopted greenhouse gas reduction goals as part of its ‘Century Agenda’ and is looking to cut emissions from its own operations by 50% from 2005 levels by 2030, and to be carbon neutral by 2050.

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It believes that replacing fossil natural gas with RNG will place the Port ahead of its 2030 target and well on the way to achieving the 2050 goal.

The Port’s top legislative priority is advocating for a clean fuel standard for the state of Washington in the upcoming legislative session.