The Portland Bureau of Environmental Services last week celebrated the opening of its new $8 million co-generation facility at the Columbia Boulevard Wastewater Treatment plant.

The facility will burn methane gas produced from the city’s solid waste to generate more than 12 million kilowatt hours of electricity, or about enough to power 1,000 Northwest homes, each year. The energy produced will provide about half of the treatment plant’s daily power demand, cutting its annual energy bills by about 40 percent.