Mechanical aeration pretreatment

Aeration of this water, either as part of a pretreatment process or by recirculation of the water over the cooling tower, will tend to reduce or remove these gases but also will saturate the water with oxygen, which is a primary factor in both corrosion processes and certain inhibitor film-formation mechanisms. 

Conventional mechanical flotation cells have been widely used in the industry for many years and remain the primary means of cleaning coal particles smaller than 100 mesh. These units consist of a number of cells (usually 4-6) connected in series, each cell containing a mechanical agitator and aerator. The feed slurry, pretreated with frother and, usually, collector reagents, passes from one cell to the next with the most floatable coal being recovered in the first cell and the least floatable coal in the last cell. 

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