Summary of the bacterial pathogen reduction and survival in several properly functioninga natural wastewater treatment system configurations. Number of systems in parentheses. It can be assumed that all produced sludges will contain pathogens where not no

Table: 

Bacteria

Process

Influent (MPN/L)

Effluent (MPN/L)

Log10 Reduction

Fecal Coliforms

Waste Stabilization Ponds: F/M1/M2 (2)

3.0E+08 to 1.6E+11

7.5E+02 to 1.1E+06

4.89 to 5.14

Fecal Coliforms

UASB-Waste Stabilization Ponds: UASB/F2 (2)

3.9E+06 to 2.3E+08

2.3E+04 to 1.1E+05

2.45

E. coli

Waste Stabilization Ponds: F/M (3)

1.2E+07 to 3.9E+09

2.7E+03 to 2.1E+05

3.02 to 4.84

E. coli

Waste Stabilization Ponds: F/M1/M2/M3 (1)

1.1E+06 to 1.2E+08

2.1E+03 to 2.3E+05

3.00

E. coli

Waste Stabilization Ponds: A/F/M(2)

2.0E+06 to 3.2E+07

3.2E+01 to 2.5E+02

2.90 to 5.00

E. coli

UASB-Waste Stabilization Ponds: UASB/F2/M1/M2 (1)

2.5E+09

4.5E+02

5.74

Vibrio cholerae 01

Waste Stabilization Ponds: F/M1/M2 (2)

3.1E+03 to 2.4E+05

0.3 to 9.0

4.26

Salmonella

Waste Stabilization Ponds: F/M1/M2/M3 (1)

3.8E+03 to 6.0E+03

1.8E+02 to 5.4E+02

1.24

aProperly functioning in terms of design, loading rates, or operation and maintenance

Table caption: 

Table 4a. Summary of pathogen reduction and survival in several properly functioninga natural wastewater treatment system configurations. Number of systems in parentheses. It can be assumed that all produced sludges will contain pathogens where not noted.

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