Excerpt from EPA Webpage

Motivated by the excellence of its employees, Penobscot Energy in 2013......



Penobscot Energy Recovery Company
Orrington, Maine

The Penobscot Energy Recovery Company is a municipal solid waste combustor that accepts more than 300,000 tons annually from 187 communities and waste producers in the region. The company uses a refuse-derived fuel technology, with solid waste shredded for combustion in a biomass boiler, and ferrous metals recovered for recycling. Steam generated from combustion is used to generate 25.5 megawatts of electricity that is sold on the grid. The process reduces the volume of waste by about 85 percent, conserving precious landfill space.

In 2015, some 7,802 tons of ferrous metal was recycled, and another project is nearing completion to recover post-combustion ferrous for recycling. Meanwhile the company has studies underway to identify the feasibility of recovering energy from the 58,082 tons of organic material and grit removed by the process.

Motivated by the excellence of its employees, Penobscot Energy in 2013 began other focused projects, including one to design and put in place a "zero liquid discharge" program that would recycle all process water internally and avoid discharging water to the Penobscot River. The existing wastewater treatment plant was repurposed to treat and recycle wastewater to other parts of the operation. By 2015, the zero liquid discharge goal had been realized. Penobscot believes the process used to reach this goal could be transferred to other small thermal power plants.


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Excerpt from EPA Webpage
Motivated by the excellence of its employees, Penobscot Ener...