Soil Passage Drinking Water Purification Soil passage of surface
water for drinking water production is effective enough in the
removal of viruses. This is one of the conclusions of the
research project of Jack Schijven. He hopes to earn his PhD on
Monday 2 April at TU Delft. An example of soil passage is dune
filtration. “The new law on water facilities states that the
chance of a virus infection caused by the consumption of
drinking water is to be less than one in ten-thousand people,”
says Schijven. “Using the results from the lab and field
research, I have developed a mathematical model with which virus
removal can be analysed in detail. About two thirds of the
drinking water in the Netherlands comes from ground water. One
third is from surface water: rivers and lakes. Surface water is
infected with micro-organisms that can cause sickness, this is a
result of the dumping of waste water and manure. These germs
have to be removed before the water can be used as drinking
water. According to the new law on th