Evaluation of the Military Effectiveness of CHLOR-FLOC Water Purification Tabletsfor Treatment of Waterborne Micro-Organisms

摘要

Tests were conducted to determine the efficacy of CHLOR-FLOC water purificationtablets for treating microbiological contaminants in drinking water. The test waters represented various physical/chemical challenge conditions. Microbial challenges consisted of enteric bacteria (Klebseilla terrigena) enterovirus (Echovirus 1), protozoan oocysts (Cryptosporidium parvum), and cyst simulant (latex beads). Studies used the U.S. Environmental Protection Agency's interim Guide Standard and Protocol for Testing Microbiological Water Purifiers for guidance. Results indicated that the CHLOR-FLOC system effectively reduced both bacterial and viral challenge components of the study to the required levels under all conditions, but failed to physically remove the oocysts and cyst simulant to the required levels under all conditions. Viability studies also indicated that the chemical disinfection component of the CHLOR-FLOC tablets had minimal capabilities to kill the encysted organisms over the 20-minute contact time. The overall study results revealed that the CHLOR-FLOC system was not adequate to physically remove, or to provide adequate chemical disinfection of, Cryptosporidium oocysts to the required level of 99.9 percent reduction. Water, Purification, CHLOR-FLOC tablets, Micro-organisms, Cryptosporidium, Klebseilla, Echovirus, Latex beads, Protozoan cysts, Bacteria, Disinfection, Coagulation.