Rapid settling clarifiers

In addition to the influence which glycerine has on the taste of wine, it also exercises an influence on the behaviour of the wine. Wines which have fermented for some time, and accordingly can only be clarified very slowly, soon settle if glycerine is added and they clarify rapidly. This phenomenon can be explained by the fact that the glycerine, although itself a product of fermentation, opposes spirituous fermentation the faint after-fermentation which still takes place in the wine can then be completely suppressed by the addition of the requisite quantity of glycerine. 

No plant-specific identification number was available for this facility. The wastewater from Plant B contains pollutants from both metals processing and finishing operations. It is treated by precipitation-settling followed by filtration with a rapid sand filter. A clarifier is used to remove much of the solids load. Table 5.14 summarizes the data on pollutant removal efficiency at Plant B. 

Most early observations of sedimentation in inclined channels indicated that a quasi-steady interface shape between the clarified layer and suspension was formed rapidly in times short compared with the characteristic suspension settling time. Moreover, the clarified liquid layer thickness below the upper channel wall was observed to be much thinner than the channel width b. Most of the clarified fluid accumulated above the horizontal interface at the top of the suspension. It was this kinematic shock interface that was observed to fall with a vertical velocity larger than the hindered settling velocity U measured in vertical settlers. 

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