Question

How to improve the ability of a Slow Sand Filter (SSF) to remove turbidity and bacteria?

Answer 1

Solution

Slow sand filter have very good efficiency to remove organic particles due to finer size of filter media. But due to improper washing of Slow Samd Filter this cause problem in purification of water.

To remove turbidity and bacteria proper cleaning should be done.

Proper Cleaning Of SSF

The simplest way to clean a slow sand filter is to use “wet harrowing”. Stop the output flow (put a plug in the output pipe so nothing can flow out while you are cleaning the filter), then agitate the water JUST ABOVE THE TOP OF THE SAND until the water becomes cloudy; taking care to not disturb the top of the sand.

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