Filter Press is a type of equipment used for the separation of liquids and solids. It works by applying pressure to force the liquid through a layer of filter material, retaining the solids inside the equipment. It is widely used in industries such as chemical, pharmaceutical, food, among others.

working process

The process of operation of the press filter is basically composed of three stages: feeding, filtration and weaning.

  1. Feeding: The liquid is fed into the filter press through an inlet, usually at the top of the equipment. The liquid is then evenly distributed over the layer of filter material.
  2. Filtration: Pressure is applied to the liquid, forcing it through the layer of filter material. The solids are retained inside the filter, while the liquid is drained out of the equipment.
  3. Weaning: After filtration, it is necessary to remove the retained solids from the filter. This is done through a process called weaning, which can be done in different ways, depending on the type of filter press. Some filters have a weaning plate that is moved to squeeze out trapped solids, while others use a dump valve to empty the filter.

The filter press can be used for a variety of applications, such as water purification, separation of liquids and solids in industrial processes, among others.


Filter press benefits include:

  • High filtration efficiency: The filter press is capable of removing up to 99% of the solids present in the liquid, guaranteeing a high quality of the filtered liquid.
  • Large filtration capacity: Due to their structure, filter presses can filter large volumes of liquid in a short period of time.
  • Low cost: The filter press is simple and robust equipment, which generally results in low maintenance and operating costs.
  • Flexibility: Filter presses can be customized to meet the specific needs of each application and can be adapted to work with a variety of filter materials.
  • Easy handling: The filter press is easy to operate and requires little human intervention, which increases process safety and efficiency.
  • Recovery of Valuable Materials: Depending on the application, the filter press can be used to recover valuable materials present in the liquid, which can result in resource and cost savings.

There are many applications for the filter press, some of the most common ones include:

  • Water treatment: It is widely used for water purification, removing solids such as sand, silt and other contaminants.
  • Food industry: It is used to separate solids from drinks and juices, in addition to removing residues from milk, beer and other liquids.
  • Chemical industry: It is used to separate solids from chemical solutions, including reagents, intermediate products and final products.
  • Pharmaceutical industry: It is used to separate solids from liquids in drug production processes.
  • Mining industry: It is used to separate solids from liquids in ore washing processes and to remove tailings water.
  • Pulp and paper industry: It is used to remove water from pulp and paper pulp, allowing the formation of paper sheets.
  • Biotechnology industry: It is used to separate cells and particles in protein and enzyme production processes.
  • Benefits

    • High filtration efficiency
    • Great filtration capacity
    • Low cost
    • Flexibility
    • Easy handling
    • Recovery of valuable materials
  • Applications

    • Water treatment
    • Food industry
    • Chemical industry
    • Pharmaceutical industry
    • mining industry
    • Pulp and paper industry
    • biotechnology industry