Filter presses are an important piece of equipment used in wastewater treatment plants for dewatering sludge. The filter press works by applying high pressure to sludge placed between permeable filter cloths. The water is squeezed out of the sludge, leaving behind a cake that contains a high percentage of solid matter.

The basic components of a filter press include the frame, filter plates, cloth, and closing mechanism. The frame provides structural support and alignment for the other components. The filter plates provide chambers and passages for the sludge and filtrate. Filter cloths are placed between the plates and act as a barrier, trapping the solids while allowing the water to pass through. A closing mechanism, such as a hydraulic cylinder, is used to push the plates together, applying pressure to the sludge.

6 Benefits Of Using Filter Presses For Sludge Dewatering

There are several benefits to using filter presses for sludge dewatering in wastewater treatment:

  • High solids capture – Filter presses can produce cakes with up to 80% solids content, significantly reducing the volume of sludge for disposal.
  • Automated operation – Modern filter presses are highly automated and require minimal operator intervention. They can be seamlessly integrated into the wastewater treatment process.
  • Environmentally friendly – By reducing sludge volume, filter presses minimize transportation and disposal costs and environmental impacts.
  • Flexibility – Filter presses can be used for dewatering various types of sludge, including alum sludge, lime sludge, and bio-solids. Plates and cloths can be configured for optimal results with different sludge types.
  • High throughput – Large capacity filter presses can process hundreds of cubic meters of sludge per day, suitable for large municipal wastewater treatment plants.
  • Low maintenance – Filter presses have relatively few moving parts so they tend to have low maintenance and operating costs.

Conclusion Of A Filter Press

A filter press is a simple, efficient and cost-effective sludge dewatering solution that brings many benefits to the wastewater treatment process. They produce high solids filter cakes, minimizing sludge disposal costs and environmental impact. For these reasons, filter presses will continue to play an important role in wastewater treatment for the foreseeable future.