The filter chamber of the plate and frame filter press is composed of a flat filter plate and a hollow filter frame. The filter cloth is fixed on the plate and frame, which is the main form of the early filter press. The filter chamber of the van filter press is composed of two adjacent concave filter plates. The main advantages are that it is convenient to replace the filter cloth. The disadvantages are low efficiency, poor filtering effect and easy to damage the filter plate.
Plate and frame filter press is a machine first applied to chemical dehydration. Although the plate and frame filter press is generally operated intermittently, with large investment in infrastructure equipment and low filtration capacity, it is still widely used in some small sewage plants because of its advantages such as large filtration driving force, high solid content of filter cake, clear filtrate, high solid recovery rate and low consumption of conditioning drugs.