that a
filter cake which has been dewatered to its maximum, i.e. out of which no more
liquid can be expelled with mechanical means, is also a cake through which one can squeeze a washing
liquid. This means that the dewatering cycle has to be stopped well short of its maximum; and by default, leaving a poorly dewatered cake, as shown in Figure 1. This applies to all filters, but obviously, the thicker the overall cake, the greater the residual Mother Liquor, the greater the risk of "back-mixing...
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