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Belt filters are used both municipally and industrially in a range of areas including urban sewage and wastewater treatment, metallurgy and mining, steel plants, coal plants, breweries, dyeing, tanneries, as well as chemical and paper factories.
The applications of a belt filter are only limited to the sludges, slurry or mashed fruit that it can process. The sludges from municipal use include raw, anaerobically digested and aerobically digested sludges, alum sludge, lime softening sludge and river water silt. In industry, any sludge or slurry is sourced from food processing wastes, pulp and paper wastes, chemical sludges, pharmaceutical wastes, industrial waste processing sludges, and petrochemical wastes. These wastes can include mixed sludge, mineral slurry, dust sediment, selected coal washing mud, biological sludge, primary sludge, and straw, wood or waste paper pulp.
Some dewatering objectives include reducing the volume to reduce the transport and storage costs, removing liquids before landfill disposal, reducing fuel requirements before further drying or incineration, producing adequate material for composting, avoiding runoff and pooling when used for land applications, and optimizing other drying processes. Belt filters are specifically designed for each of these particular applications and feeds.
Process Charateristics :
Belt press filters are designed for solids capacity, by weight or volume, rather than wastewater flow. Solids concentration must be determined based on the concentration of primary solids in the feed and further solids that may precipitate during treatment. Solids concentration for a process will vary, thus the design must have the capacity to deal with varying feed solids concentration.
The feed to a belt press filter depends on the type of solids, desired product and filter design. For most sludge types the feed dry solids concentration is typically in the range of 1-10%.The resulting dewatered sludge (or cake) dry solids concentration typically falls in the range of 12-50%. Dilute feed solids concentration results in a cake of higher moisture content whilst a higher feed solids concentration yields an improved solids filtration rate and drier end product.
The video is of Municipal Sludge dewatering where the feed solids are between 3% to 5% with Mixed Sludge ; A thorough flocculation unit is separately provided for good floc formation resulting in this result of about 20% - 22% solids in the discharge.
With INDOFAB Belt Filter Press dewatering is a continuous process with minimum power consumption and maximum consistent results; due to High pressure Belt was and Automatic Pneumatic controlled pressure & Belt tracking mechanism
Key Advantages of Using Twin Belt Filter Press for Dewatering
w.r.t. Basket Centrifuge / Solid Bowl Centrifuge / Volute Press / Vacuum Drum Filter & Filter Press / Diagphragm Filter Press
- Continuous process of Dewatering all types of sludge with amongst lowest foot Print.
- Lowest Direct and Indirect Power Consumption amongst any Dewatering Equipment.
- Mechanical Dewatering using Twin Belts ensures maximum compression for all types of sludge.
- Modular structure, standard sizes, ease of maintenance access, vertical structure for gravity drainage and with BFP its possible to have complete automation.
- Lowest investment cost amongst any continuous type of Dewatering Equipment when compared on both costs Initial Investment & Operating cost both.
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