This document discusses different types of sand filters used to filter water, including slow sand filters and rapid sand filters. It explains that sand filters work by allowing waste water full of sludge to pour into the sand, where the sludge is stuck in the sand and filtered out. The filtered water then moves through the sand using gravity or pressure and goes to the next treatment stage. Sand filters have applications for biosand filters, aquarium filters, and pool filters.

1. Presented by : Nur Hanin Tasnim Bt Mohd Khamri
ID : 55102215021

2.  Slow sand filter
Type of sand filter:
 Rapid sand filter

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How it works
 Waste water that have full of sludge pour in the sand
filter
 It been filter by the sand
 Sludge stick at the sand
 Filtrate water move using gravity force or pressure
force
 Filtrate water move to next treatment

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6. 
Application :
Biosand
filter
Sand filter for
aquarium
Sand filter
For pool