Biogas Plant Makes Fuel, Money for Arizona County

Pima County has started turning methane gas from a sewage treatment plant into home heating fuel, and money.

At the Tres Rios Water Reclamation Facility, the county's main treatment plant near Ina Road and I-10, the county used to burn the gas to generate electricity for the plant. Changing regulations made that system uneconomical, so the county built a $10 million plant to clean up the methane, and sell it to Southwest Gas.

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