Table 2 Removal of microbial agents in treated wastewater according to US-EPA standards (Ref. [26, 27])

Total coliforms

1000 ^aMPN/100 mL

Salmonella

Not detected/50 g of final product

Escherichia coli

< 100 ^aMPN per gram (dry weight)

Fecal coliforms

< 1000 ^aMPN per gram (dry weight)

Enteric viruses

<  1 PFU per 4 g total dry solids

Helminth eggs (Ascaris sp. and Taenia sp.)

<  1 per 4 g total dry solids