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Utility managers looking for strategies to assess pathogenremoval by filtration with tools that are easier to use andmore cost-effective than monitoring Cryptosporidium parvumdirectly will find this article of interest. The article discusses howoocyst-sized microspheres are easier, safer, and less expensive towork with than Cryptosporidium parvum and are also a reliabletool for assessing C. parvum removal by filtration. It also showsthat the ability of filters to remove C. parvum is not the sameduring all phases of the filter cycle. Even when a filter is in compliancewith drinking water regulations, its C. parvum removalcapacity can be substantially worse near the end of a filter cyclecompared with the earlier portions of the cycle.This work also emphasizes that process evaluations mustconsider all operating periods, not just optimized operation. Further,it suggests that there can be a real difference in waterquality even when differences in turbidity are very small. Includes 16 references, table, figures.

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Edition: Vol. 95 - No. 5 Published: 05/01/2003 Number of Pages: 10 File Size: 1 file , 380 KB