Belt Press vs. Filter Press: A Professional Comparison for Industrial Dewatering

Choosing the right sludge dewatering equipment is essential for stable wastewater treatment performance, reduced disposal costs, and long-term operational efficiency. Among the most common technologies, the belt press and the filter press serve different needs. Understanding their characteristics helps operators select the most suitable solution. As an experienced manufacturer, Kerte provides technical guidance and customized filter press systems for various industries.

1. Dewatering Performance

The fundamental difference between a belt press and a filter press lies in their filtration pressure and final cake dryness.

A belt press uses gravity drainage and moderate mechanical squeezing. While it supports continuous operation, the final cake moisture typically remains 60–80%, making it appropriate for facilities with moderate dryness requirements.

A filter press delivers much higher filtration pressure, producing a significantly drier cake—usually 20–30% moisture, and even lower when using membrane squeezing. This reduction in moisture directly lowers transportation and disposal expenses, offering stronger long-term economic benefits.

2. Operating Costs

Operating cost comparison highlights the advantages of a filter press.
A one-meter belt press typically requires ≥3 kg/tds of flocculant to prevent sludge leakage through the belt fabric. It also consumes 60–70 m³/day of wash water for belt cleaning. Although electricity usage is relatively low, the combined chemical and water costs lead to higher daily expenses.

The 120-square-meter filter press, equipped with dense filter cloth and high-pressure filtration, generally needs 1–2 kg/tds of chemicals and minimal wash water during operation. Automated systems—such as plate shifting and cloth washing—reduce labor requirements, lowering daily operating costs.

3. Maintenance & Durability

Belt presses contain many rotating components prone to wear and corrosion, leading to frequent belt, bearing, and roller maintenance.

Filter presses feature a more enclosed structure with fewer moving parts. Routine tasks mainly include cloth replacement and hydraulic inspections, resulting in lower maintenance consumption and extended equipment life.

4. Application Suitability

A belt press is ideal for continuous processing with moderate dryness needs.
A filter press is preferred for industries demanding maximum dryness, high solid capture, and reduced sludge disposal cost.

For long-term efficiency and cost savings, the filter press offers clear advantages. Kerte provides high-performance, automated filter press solutions engineered for reliable and efficient dewatering.