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RESEARCH IN FILTRATION FOR CRYPTOSPORIDIUM REMOVAL
Citation:
Fox*, K R. RESEARCH IN FILTRATION FOR CRYPTOSPORIDIUM REMOVAL. Presented at KY-TN Section AWWA Ann Meeting, Nashville, TN, 10/1-4/2000.
Description:
The USEPA has conducted pilot plant studies for the removal of Cryptosporidium oocysts from drinking water. Fourteen pilot-scale tests were performed to assess the ability of conventional treatment to control Cryptosporidium oocysts and three surrogates; turbidity, total particle counts and aerobic cndospores. Cryptosporodium oocysts were fed into the raw water at a target concentration of 10(6)/L for 30 to 71 hours in each of the fourteen runs. The impacts of coagulant type, coagulant dose, raw water quality, filter loading rates and filter media were evaluated. Under optimal coagulation conditions, conventional treatment achieved greater than 4 log 10 total Cryptosporidium removal. Under these conditions, log removals of surrogates were also consistently conservative, relative to Cryptosporidium. This presentation will discuss these pilot plant results and other related work done by EPA.