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# What is Deliquoring?

## What is Deliquoring?

The term drying means thermal drying, while the elimina- tion of liquid from the filter cake by mechanical forces is called deliquoring or dewatering, e.g., deliquoring by a pressurized gas or by expres- sion. Filtration processes can be classified in accor- dance with different criteria: 1.

### What is filter medium resistance?

1.3Filter medium Resistance, RThe filter medium resistance is the resistance due to the solid particles which forms the cake andalso the filter medium (cloth). It has the meaning of the measure of the average ability of solidparticles to pass through a filter medium.

#### Is filter medium resistance constant?

c) The resistance of the filter medium βM is constant for the whole filtration process.

What is cake filtering?

When liquids contain high solid loads, cake filtration is often used as a physical filtration technology. The liquid passes through the filter medium while the solids form a layer on its surface. During the filtration cycle, this layer retains other particles and becomes thicker, creating the ‘filter cake’.

What is the cake resistance?

In the calculation of solid/liquid separation processes, the specific resistance of a filter cake is always used as a measure of the difficulty of fluid permeation through the filter. The filtration-rate equation is useful to solve cake filtration.

## How is filter rate calculated?

Filtration and backwash rates are calculated by dividing the flow rate through the filter by the surface area of the filter bed. Typically these rates are measured in gallons per minute per square foot of filter bed area.

### What is cake resistance in filtration?

A filter cake is formed by the substances that are retained on a filter. The filter cake grows in the course of filtration, becoming “thicker” as particulate matter and filter aid is retained on the filter. With increasing layer thickness, the flow resistance of the filter cake increases.

#### What is filter cake made of?

The filter cake that results from the treatment of used frying oil with an adsorbent is composed of the filter aid, the absorbed oil (nonplar triacylglycerol), and the adsorbed polar compounds.