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A Practical Assessment of the Use of Particle Counters for Monitoring the Risk of Cryptosporidium and Giardia
Author(s) -
Wilson R.,
Morse A.
Publication year - 2002
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/j.1747-6593.2002.tb00359.x
Subject(s) - cryptosporidium , giardia , particle (ecology) , raw water , environmental science , hydrology (agriculture) , biology , environmental engineering , ecology , engineering , microbiology and biotechnology , geotechnical engineering , feces
The paper describes a project which was carried out to establish whether particle counts can be used to predict the risk of Cryptosporidium and Giardia breakthrough at a large water‐treatment works. The project was based at a direct river‐abstraction works which treats up to 120 MI/d. On‐line particle counters were installed following three of the rapid‐gravity filters, and a fourth counter was used to measure particles in spot samples of raw and clarified water. There was a clear relationship between particle counts and the occasional low‐level (oo)cyst (crypto oocysts and giardia cysts) occurrence in the filter samples, and no (oo)cysts were found in the final water. There appear to be complex inter‐relationships between particle counts and other parameters such as raw‐water conditions, environmental factors and treatment‐plant variables.