the sludge is evenly fed into the mesh belt through the cloth bucket, and runs forward with the filter belt. The free water flows into the water tank through the filter belt under the action of self-weight and removes the free water in the sludge to make the sewage The fluidity of the mud is reduced to prepare for further extrusion. Gravity dewatering is followed by a wedge-shaped pre-pressure dewatering stage, and slight extrusion dewatering ensures that the sludge is smoothly pressed and dewatered. The upper and lower filter belts sandwich the filter cake and repeatedly press and shear around the press roll to remove a large amount of capillary action water so that the filter cake moisture is gradually reduced, thereby achieving dehydration.
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Because of the variety of species, when choosing the corresponding filter press, not only the practical type of the filter press itself, but also the cost of using it, and a high-end and suitable filter press will be You save a lot of money. There are many enterprises that purchase filter presses are used in sewage treatment. The capacity of equipment cannot be loaded with sludge, which often causes sludge accumulation. According to environmental protection regulations: sludge with a water content of less than 60% can be used for resource utilization. Therefore, when purchasing a filter press, the primary factor is the moisture content of the sludge treated by the equipment.
What type of filter press should we choose to be suitable for the amount of wastewater we need to process every day. Below we need to choose the filter press according to the calculation of sewage treatment. Commonly used calculation methods include wet sludge volume method, dry sludge volume method and suspended solids method. The wet sludge volume method is relatively accurate, and the data required for calculation is also easy to measure, so it is recommended to use it preferentially.
Filter area standard: The filter area of a filter press manufactured according to the national standard is equivalent to a solid volume of 15 L per square.
Before filter press: volume V1 (m3), moisture content of sewage before filter press a (underflow) = 97.5%~99.2% (general experience value). After pressure filtration: volume V2 (m3), sludge moisture content after pressure filtration b (non-washable) = 75%.
Pressure filtration cycle: the number of pressure filtration per day t. Solid content balance method: V1 × (1-a) = V2 × (1-b), and it is found that V2 = V1 × (1-a) / (1-b). Filtration area: S = × V2 / 15t = × V1 × (1-a) / 15t (1-b).
For example: a sewage treatment plant in Luoyang, Henan, the number of pressure filtration times per day t = 1, after treatment (to the sludge concentration tank) to produce a wet sludge volume V1 = 8m3, water content a = 98.0%, assuming daily sludge treatment 1 Second, the filter area of the required filter press = × 8 × (1 – 98%) / 1 × 15 × (1-75%) = 42.6, according to the calculation, it is recommended to use a filter area of 42.6m2 filter press.
According to the above example, it is necessary to select a filter press with a filter area of 42.6 m2, and an optional G50-80 chamber filter press or an lZZG model DY belt filter press.
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When investing in a Dewatering Filter Press, understanding the total cost—beyond just the price of the equipment—is crucial. Many customers ask, “What is the all-in cost, from labor to installation?” Since filter press dewatering systems are customized for each facility, installation expenses can vary significantly. However, here are nine key cost factors to consider when planning for your dewatering system installation.
Before construction begins, the site may require fill dirt, stone, or gravel for leveling. This cost depends on site conditions, material pricing, and transportation. Clean fill dirt typically costs between $8 to $15 per cubic yard.
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Preparing the site involves excavation, stabilization, and clearing. While some companies opt for in-house site prep to save money, outsourcing can cost anywhere from $25,000 to $50,000, depending on equipment rental and labor.
Concrete requirements vary based on system size and structural load. A smaller dewatering plant may require $50,000 worth of concrete, while larger plants can exceed $125,000. The average concrete cost per cubic yard is $108, so consulting a contractor for precise estimates is essential.
Piping and hardware beyond what the filter press manufacturer provides must be considered. Costs depend on system size, contractor fees, and additional piping requirements. Plumbing installation can range from a few thousand dollars to tens of thousands, especially for large-scale clarifier systems.
A certified electrician is needed for electrical hookups, which include control boxes and power connections. Depending on plant size, electrical costs can range from $15,000 for small plants to over $100,000 for larger systems.
Companies can either use internal teams or outsource labor. The installation typically requires 2-4 workers and lasts two weeks for small plants or up to six weeks for larger facilities. Labor costs depend on contractor rates and internal resource availability.
Most filter press manufacturers provide on-site technicians for installation coordination. Costs vary based on plant size and complexity, typically ranging from $10,000 for small installations to $50,000+ for large systems, plus travel expenses.
Cranes and lifting equipment are often required for installation. Rental costs range from $225 per hour (small cranes) to $300 per hour (large cranes), with usage typically covering 25-50% of the installation process. Additional costs may include transportation and operator fees.
Local or federal permits may be required, adding to the overall project cost. Fees vary by location, so checking with your Building and Zoning Department is essential for accurate estimates. Engineering drawings and consultations may also be needed.
The total cost of installing a dewatering filter press depends on system size, site conditions, and labor. Estimated costs include:
The best way to determine your dewatering filter press installation cost is to:
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