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

Table: 

Protozoa

Process

Influent

Effluent

Log10 Reduction

Final Sludge

Giardia cysts

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

1.6E+02b

2.3E+01b

0.84

Contaminated

Giardia cysts

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

2.9E+02 to 3.8E+03b

1.4E+01 to 2.5E+03b

0.5 to 1.5

Contaminated

Giardia cysts

UASB-WSP: UASB/F2/M (1)

2.4E+02b

7.3E+01b

0.52

Contaminated

Cryptosporidium oocysts

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

6.0c

4.0c

0.18

Contaminated

Cryptosporidium oocysts

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

4.0 to 1.64E+02c

0.4 to 1.1E+01c

0.7 to 0.8

Contaminated

Cryptosporidium oocysts

UASB-WSP: UASB/F2/M (1)

9.5c

6.5c

0.16

Contaminated

Table caption: 

Table 5c. Summary of protozoan pathogen reduction and survival in several poorly functioninga natural wastewater treatment system configurations. Number of systems in parentheses.

Your Information
Your Comment