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many villages in Indonesia, because very simple, low operating and low
investment cost. Sarpalam is the acronym of Saringan Pasir Lambat (Slow Sand
Filter). For optimal process, the system should meet with the standard design for
Slow Sand filter. Somba is one village that is situated in Northern Part of South
Sulawesi. In that village there is a Slow Sand Filter with 5 l/s capacity to serve
around 5.000 people. The problem is the quality of water is very low, turbid and
smell. The source of water come from the hill, in the eastern part (around 3 km
up hill). After investigation founded that, the system is not meet with standard
Slow Sand filter and need modification for increasing the quality of product water. There are some constrain in the modification of the system, namely : existing construction, lack of space in the hill, stability of land, and quality of product water.
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