Florida county plans futuristic incinerator

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FORT PIERCE, Fla. -- A Florida county has grand plans to ditch its dump, generate electricity and help build roads -- all by vaporizing garbage at temperatures hotter than the sun.

The $425 million facility expected to be built in St. Lucie County will use lightninglike plasma arcs to turn trash into gas and rocklike material. It will be the first such plant in the nation operating on such a massive scale and the largest in the world.

Supporters say the process is cleaner than traditional trash incineration, though skeptics question whether the technology can meet the lofty expectations.

The 100,000-square-foot plant, slated to be operational in two years, is expected to vaporize 3,000 tons of garbage a day. County officials estimate their entire landfill -- 4.3 million tons of trash collected since 1978 -- will be gone in 18 years.

No byproduct will go unused, according to Geoplasma, the Atlanta-based company building and funding the plant.

Synthetic, combustible gas produced in the process will be used to run turbines to create electricity -- about 120 megawatts a day -- that will be sold back to the grid. The facility will operate on about a third of the power it generates, free from outside electricity.

About 80,000 pounds of steam per day will be sold to a neighboring Tropicana Products Inc. facility to power the juice plant's turbines.

Sludge from the county's wastewater treatment plant will be vaporized, and a material created from melted organic matter -- up to 600 tons a day -- will be hardened into slag, and sold for use in road and construction projects.

"This is sustainability in its truest and finest form," said Hilburn Hillestad, president of Geoplasma, a subsidiary of Jacoby Development Inc.

For years, some waste-management facilities have been converting methane -- created by rotting trash in landfills -- to power. Others also burn trash to produce electricity.