Summary of E. coli reduction and survival in several poorly functioninga natural wastewater treatment system configurations. Number of systems in parentheses.

Table: 

Process

Influent (CFU/L)

Effluent (CFU/L)

Log10 Reduction

Waste Stabilization Ponds: F/M (4)

1.2E+08 to 9.0E+09

1.3E+06 to 1.2E+08

1.87 to 1.99

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

3.0E+05 to 6.2E+08

1.3E+06 to 2.1E+07

0.7 to 1.1

aPoorly functioning as a result of design, overloading or lack of operation and maintenance.

Table caption: 

Table 5a. Summary of E. coli reduction and survival in several poorly functioninga natural wastewater treatment system configurations. Number of systems in parentheses.

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