Energy-Saving Belt Filter Press with Closed Water Circulation - Eco-Friendly Sludge Treatment

Belt filter press description

A Belt Filter Press is a sludge dewatering device that applies mechanical pressure to a chemically conditioned slurry, which is sandwiched between two  tensioned belts, by passing those belts through a serpentine of decreasing diameter rolls. The machine can actually be divided into three zones: the gravity zone, where free draining water is drained by gravity through a porous belt; the wedge zone, where the solids are prepared for pressure application; and the pressure zone, where medium, then high pressure is applied to the conditioned solids.

Belt filter press principle

Belt presses are a common type of mechanical dewatering equipment used to dewater most biosolids generated at municipal wastewater treatment plants and many industrial applications. Belt presses are used to remove water from liquid wastewater residuals and produce a non-liquid material referred to as “cake”. The Belt Filter Press is a broadly applicable product for dewatering municipal biosolids and industrial sludges. Since this is a continual process, it is effective on high-volume waste streams where a large production of low-quality filter cake is acceptable.

Many belt press designs and filtration processes are available, but all incorporate the following basic features: polymer conditioning zone, gravity drainage zones, low pressure squeezing zone, and high pressure squeezing zones. A belt filter dewaters biosolids or industrial sludges by applying pressure to squeeze out the water or liquid phase. Belt Filter Presses are available in a three-belt, a two-belt, and an extended gravity two-belt design. Advanced designs provide a large filtration area, additional rollers, and variable belt speeds that can increase cake solids.

Belt Filter Press Advantage

• Cost-effective installation: Economical to install, providing a budget-friendly dewatering solution.
• Efficient energy use and automatic operation: Designed for minimal power requirements, it ensures low energy consumption and can operate automatically, reducing the need for continuous supervision.
• Low operating costs: With its efficient design and operation, the BFP keeps operating costs to a minimum.
• High capacity in a small footprint: Provides high dewatering capacity with minimal space requirements, making it ideal for facilities with limited space.
• Good dewatering results: Delivers good dewatering performance, ensuring effective sludge management.

Belt filter press features

• A choice of 2 or 3 belt dewatering systems with standard, extended, or independent gravity zones for consistently high cake solids in varying sludge conditions
• When higher hydraulic sludge capacities need to be treated, the drainage zone is extended by installing a thickening stage before the actual dewatering process
• Increase of the effective filtration areas
• Innovative low pressure zone concept consisting of a big diameter perforated roll substitution in the traditional wedge area
• Effective high pressure zone (increase of pressure intensity and time)
• The possibility to install 5-7-9-11 rolls in final high pressure zone allows the machine to be configured per the application characteristics and required performance

Belt filter press applications

• Municipal
• Raw
• Primary
• Primary & WAS
• Anaerobically Digested
• Primary
• Primary & WAS
• Aerobically Digested
• Primary & Activated
• WAS
• Potable Water Plant
• Alum Sludge
• Lime Softening Sludge
• River Water Silt
• Industrial
• Food Processing Wastes
• Pulp & Paper Wastes
• Chemical Sludges
• Pharmaceutical Wastes
• Industrial Wastes Processing Sludges
• Petrochemical Wastes