Summary of protozoan 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.

Table: 

Protozoa

Process

Influent

Effluent

Log10 Reduction

Final Sludge, Cysts or Oocysts/g TSe

E. coli, E. histolytica, Giardia

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

4.0 to 3.3E+02b

NDc

>1.74

1.20E+02f

Giardia

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

5.3 to 4.01E+01b

ND to 1.4

1.57

6.8E+02f

Cryptosporidium

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

1.75E+01 to 2.17E+02d

ND to 1.4

1.98

1.1E+02g

aProperly functioning in terms of design, loading rates, or operation and maintenance; bCysts/L; cND: Non-detect; dOocysts/L; eTS: Total Solids; fCysts/g TS; gOocysts/g TS

Table caption: 

Table 4b. Summary of protozoan 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.

Your Information
Your Comment