Bacterial pathogen reduction and survival in conventional activated sludge without disinfection

Table: 

Bacteria

Influent

Effluent

Log10 Reduction

Final Sludge

Fecal Coliformsa,b

2.1E+06 to 1.5E+09

1.1E+04 to 9.3E+07

2.22; 3.10f

NRg

E. colia,b

5.4E+04 to 3.5E+08

3.5E+04 to 1.6E+07

1.49

Contaminated

E. colic,d

1.0E+03 to 1.0E+06

1.0E+03 to 1.0E+05

0.30 to 1.00

Contaminated

E. colie

NR

NR

1 to 2

NR

aSources: Ayed et al., 2009, Flannery et al., 2012, Fong et al., 2010, Ramo et al., 2017, Rose et al., 1996, 2004, Tyagi et al., 2011; bMPN/L ; cSources : Feachem et al., 1981, 1983 ; dCFU/L ; eSource : WHO, 2006 ; fLog10 reduction shown are two mean values from two activated sludge plants; gNR: Not Reported

Table caption: 

Table A1a. Bacterial pathogen reduction and survival in conventional activated sludge without disinfection

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