Table 8.
Summary of field water disinfection techniques.
Bacteria | Viruses | Giardia/ameba | Cryptosporidium | Nematodes/cercarea | |
---|---|---|---|---|---|
Heat | + | + | + | + | + |
Filtration | + | +/āa | + | + | + |
Halogens | + | + | + | ā | +/āb |
UV | + | + | + | + | DNA |
Chlorine dioxide, ozone, and photocatalytic | + | + | + | + | DNAc |
DNA, data not available.
Most filters make no claims for viruses. Ultrafiltration with hollow-fiber technology and reverse osmosis is effective.
Eggs are not very susceptible to halogens but very low risk of waterborne transmission.
No data available for photocatalytic disinfection.