Abstract
This article discusses a filter rerating study conducted by the Southern Nevada Water Authority (SNWA), which demonstrated that increased filter loads didn't affect public health, and provided additional capacity without the high cost of construction. The article discusses SNWA's testing protocol, filter loading rate, filter effluent turbidity, filter average run time, and evaluates filter production. The study demonstrated that SNWA's filters could be operated safely at increased loading rates of up to 7.5 gpm/ft2 while maintaining filter effluent water quality, thus saving the utility more than $10 million in construction costs alone.
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