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MICROFILTRATION SIDESTREAM TREATMENT PRIOR TO RECYCLE

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Abstract:

This project focused on the recycle challenges posed by the potential presence of Cryptosporidium in microfiltration (MF) residuals. Among the various methods for treating MF backwash streams, clarification was selected because it was successful for treating spent filter backwash water from conventional plants, is economical, and is familiar to water plant operators and U.S. regulators. Successful results from bench-scale treatability tests guided the pilot- and full-scale studies. Microbial performance indicators for the pilot test included inactivated Cryptosporidium parvum oocysts and Bacillus subtilis aerobic endospores. Coagulation/clarification of MF backwash streams was successful in producing a recycle quality similar to the original raw water.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864703784292818

Publication date: 2003-01-01

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