1. Filtration occurs both in nature and in slow sand filtration . 2. Sand filtration is another method used to treat water.3. Large-scale sand filtration facilities also require large surface areas to accommodate them. 4. An experiment of sand filtration was illustrated by the Italian physician Lucas Antonius Portius. 5. The McMillan Reservoir and the McMillan Sand Filtration Site in DC also bear his name. 6. Sand filtration is very effective at removing protozoa and bacteria, but struggles with removing viruses.7. He wrote about the multiple sand filtration method in his work " Soldier's Vade Mecum ". 8. A useful side effect of the system is that the collected seawater is very pure because of the sand filtration effect. 9. Slow sand filtration was initially the technology of choice for water treatment, later being gradually displaced by rapid sand filtration. 10. Slow sand filtration was initially the technology of choice for water treatment, later being gradually displaced by rapid sand filtration .
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