concentration of E. coli in dewatered sludge was 1.77.1013 CFU d1,
indicating a net reduction of 6.27.1014 CFU d1 (S1 - (S10 + S13)),
which represents 96.8% or 1.5 log compared to the initial
concentration. It can be concluded therefore that in the plant
under study there was a net positive balance in terms of E. coli
elimination.