How is the N-Viro process regulated under federal regulations?
The USEPA approved the N-Viro process to treat wastewater biosolids in the late 1980s as a process that is equivalent to a PFRP process (Process to Further Reduce Pathogens). Based on the extensive test data needed to gain approval as an equivalent PFRP, the N-Viro process, as submitted to the Pathogen Equivalency Committee (PEC), reduces pathogens below detectable levels — all pathogens are eliminated. This approval was carried over in 1993, when the Sludge Regulations (Part 503) were promulgated, and is classified as Class A Pathogen Disinfection Alternative #6: Use of a Process Equivalent to PFRP.
