Achieving pathogen stabilization using vermicomposting

After two years of tests, a project in Florida finds that vermicomposting is effective in reducing pathogen levels in biosolids to meet Class A requirements.

WITHIN the last decade, implementation of state and federal regulations and other local codes have changed biosolids processing in Florida. Previously, biosolids stabilization varied greatly among the state's 3,500 to 4,000 wastewater treatment facilities. Public and privately owned wastewater treatment facilities were required to stabilize their biosolids to a minimum Class C standard for land application, with most facilities using aerobic or anaerobic digestion. Requirements for septage solids stabilization, prior to …