A food grade corn starch of Cargill, Turkey, was used as
the flocculant. The starch solution was prepared by dispers-
ing 1g starch in 900ml of cold (room temperature) distilled
water and adding NaOH of 1M concentration to the suspen-
sion until starch molecules were fully dissolved. It was then
homogenized in a high speed blender for 30s and made up
to 1L for the tests.