By the Columbus Dispatch.

Over two decades, central Ohio’s landfill has partnered with an array of entrepreneurs, investing in ideas — some fantastical — to turn garbage into cash.

A few worked, including mulch operations. However, others — such as a plan to turn trashed Styrofoam into new construction materials for builders — were spectacular flops, tying up agency resources or prompting lawsuits.

So it’s good to see a success at the facility. The Solid Waste Authority of Central Ohio is making money on a once-failed green-energy venture, raking in about $1 million in its first year.