[The action of different coagulants to remove Cryptosporidium during the process of water treatment].
Cryptosporidium is one of the microorganisms of main concern from the point of view of Public Health, being a priority problem for water treatment plants and water regulatory institutions. Due to its small size and resistance to chlorination, Cryptosporidium removal during the process of drinking water treatment is a hard task. The effectiveness of different coagulants commonly used in the process of removal of oocysts was analyzed. The technique used was the Jar Test. It was found that: 1) coagulants with the addition of polimeric coadjuvants produce over 2 logs of oocyst removal; 2) a low value in turbidity does not necessarily mean optimal parasite removal, and 3) the addition of polyelectrolites to ferric chloride diminishes variability, both in final turbidity and Cryptosporidium removal.
Abramovich
B
B
Sección Aguas, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Paraje El Pozo, C.C. 242, 3000 Santa Fe, Argentina. blerman@fbcb.unl.edu.ar
Lura
M C
MC
Carrera
E
E
Gilli
M I
MI
Haye
M A
MA
Vaira
S
S
D000818:Animals; D003457:Cryptosporidiosis / Q000517:prevention & control / Q000635:transmission; D003458:Cryptosporidium; D006801:Humans; D033661:Oocysts; D014871:Water Microbiology; D018508:Water Purification / Q000379:methods*