[The action of different coagulants to remove Cryptosporidium during the process of water treatment]
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Updated: Jul 30, 2026

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Published on: March 3, 2012
B Abramovich1, M C Lura, E Carrera
1Sección 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
Abstract:
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.
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