Stepping Up in Class: Finding a Way to Make Class A Biosolids

A plant upgrade in Mechanicsburg included a switch from Class B Biosolids to producing and marketing Class A compost as a soil additive.
Stepping Up in Class: Finding a Way to Make Class A Biosolids
The 2 mgd (design) Mechanicsburg Wastewater Treatment Plant serves a population of about 14,000.

Landfill space was at a premium. Land application of Class B biosolids faced public skepticism and rising costs. So the Mechanicsburg (Pennsylvania) Sewer Department turned to producing Class A compost.

In the bargain, the department erased its landfill costs and now markets...

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