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“Filter aid can also be added to the fermentation broth to increase the porosity of the cake as it forms”, what does this statement means?

“Filter aid can also be added to the fermentation broth to increase the porosity of the cake as it forms”, what does this statement means? Correct Answer To increase the filtration rate

The additive should provide a thin layer of solids having high porosity (0.85 to 0.90) over the filter medium’s external surface. As Suspension particles will ideally form a layered cake over the filter aid cake layer. The high porosity of the filter aid layer will ensure a high filtration rate. Porosity is not determined by pore size alone. High porosity is still possible with small size pores. And at high pH and low pI the proteins will not denature and not coagulate and therefore more aggregates will not be formed so there will be less filtration rate.

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