Lamella clarifier/thickener

Lamella clarifier/thickener, 22 63, 67-69 Lamellar liquid crystals... 

Figure 1.5 Lamella clarifier/thickener (Svedala, Pumps Process AB, Sala, Sweden)...

Figure 5.5 Lamella clarifier (may be also used as a thickener)...

The size of the settlement basin is sometimes reduced by employing a series of internally mounted plates inclined at about 60° to the horizontal. In a similar manner to the lamella separator (see Section 1.1.2.3), the effective settling area is increased to allow sedimenting solids to slide down the plates and into the collecting well. Other variants include the vertical flow clarifier, the blanket clarifier and the circular clarifier the latter is similar in form to a conventional circular thickener but of a much lighter construction. 

The Lamella thickener/clarifier also comes into this category but it has already been described in the previous section on clarifiers. 

Lamella separators can be used as liquid/liquid separators (as in oil-water separation - discussed at some length in Section 5C), or as clarifiers, for the removal of small amounts of suspended solids - an application of increasing use in water treatment. Liquid/liquid separation and solid removal can also be achieved in the one separator. The device can, in addition, be used as a thickener, in which case there will be a sludge collection space below the plate assembly, which must be deep enough to allow the formation of a sludge compression zone. 

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