Wednesday, August 27, 2008

Schmutzdecke

Schmutzdecke (German, "grime or filth cover", sometimes spelt schmutzedecke) is a complex biological layer formed on the surface of a slow sand filter. The schmutzdecke is the layer that provides the effective purification in potable water treatment, the underlying sand providing the support medium for this biological treatment layer.

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Solastalgia

  Solastalgia ( / ˌ s ɒ l ə ˈ s t æ l dʒ ə / ) is a neologism , formed by the combination of the Latin words sōlācium (solace or comfort)...