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Impact of raw water quality on operation of variable declining rate filter plants

Zielina M., Dąbrowski W.

Environment Protection Engineering

2011

Vol. 37, nr 2

133-140

According to some numerical models of variable declining rate filters in a bank changes in raw water quality do not interfere with values of flow rates through filters as long as subsequent backwashes in a plant start always for the same water surface level above filter media. This simple operational rule was previously tested numerically. Now some results of experimental tests are also presented. Laboratory experiments confirm the operational rule predicted theoretically and supported by numerical computations.