Sedimentation of magnesium hydroxide in seawater and its effect on plant capacity

Abstract

The sedimentation rate of magnesium hydroxide in seawater was examined for different degrees of completeness of precipitation and for different additions of the A-130 flocculant. The study showed that incomplete precipitation of magnesium hydroxide,i.e. precipitation with a nonstehiometric quantity of the precipitation agent; considerably increased the rate of sedimentation of magnesium hydroxide, and thus the capacity of the thickener was also increased. At a precipitation of 80% the capacity of the thickener increased by 71% in relation to complete precipitation. Calculations were made according to Kynch's theory.