Sand Filter

Sand Filter

Sand filters are used for water purification. There are three main types;

  1. rapid (gravity) sand filters
  2. upflow sand filters
  3. slow sand filters

All three methods are used extensively in the water industry throughout the world. The first two require the use of flocculant chemicals to work effectively whilst slow sand filters can produce very high quality water free from pathogens, taste and odour without the need for chemical aids.

Read more about Sand Filter:  Sand Bed Filtration in Context

Famous quotes containing the word sand:

    “The shore is composed of a belt of smooth rounded white stones like paving-stones, excepting one or two short sand beaches, and is so steep that in many places a single leap will carry you into water over your head; and were it not for its remarkable transparency, that would be the last to be seen of its bottom till it rose on the opposite side. Some think it is bottomless.”
    —Henry David Thoreau (1817–1862)