A study conducted by Michigan State University researchers found that after treatment, biosolids had low levels of bacteria
A recent Michigan State University study concludes that Big Fish Environmental’s Class A biosolids have concentrations of E.coli and enterococci below detection limits.
The study, undertaken by Sangeetha Srinivasan of the Department of Crops and Soil Sciences, analyzed and compared treated and raw sewage samples from Big Fish’s Charlevoix, Mich., plant. The study compared levels of E. coli and enterococci with those of the Big Fish treated biosolids.
Cultivation and new molecular methods were used to track the fecal material through the process. Samples were processed for growth on standard culture for E. coli and enterococci.
After treatment in the Big Fish system, all of the biosolid samples had concentrations of cultivatable E.coli and enterococci below the detection limit, which is 0.33 cfu/g.
The Michigan State study follows on the heels of an endorsement Big Fish received in 2010 that is based on a 13-month verification test performed by NSF Intl. under the Environmental Protection Agency ETV Program’s Water Quality Protection Center.