Filter Press Supplier in Bangladesh
Sunshine filter presses for sludge dewatering and solid-liquid separation in ETP and STP plants, from general hydraulic to programmable automatic and membrane types, supplied with installation and after-sales support by Techno Bangla Creation.
What Is a Filter Press?
A filter press is a batch machine that separates solids from liquid under pressure. It holds a series of cloth-covered plates pressed together. Sludge is pumped into the chambers between the plates, the water (filtrate) passes through the cloth, and a solid filter cake stays behind. In ETP and STP plants it is used for sludge dewatering.
A filter press is not a screw press. A filter press works in batches and presses the cake between plates, while a screw press dewaters continuously with a rotating screw. For the continuous type, see our screw press page.
- Four types: general hydraulic, programmable automatic, high-pressure PP membrane and high-pressure membrane
- Solid-liquid separation for ETP, STP, oil mills, paper mills, coal mining and iron recovery
- Membrane types squeeze the cake again for a drier result
- Installation and after-sales support in Bangladesh
Filter Press Specifications
- Type
- Filter press with a series of cloth filters fixed to frames, for filtration of liquid under pressure
- Function
- Solid and liquid separation, sludge drying
- Models
- General Hydraulic, Programmable Automatic, High Pressure PP Membrane, High Pressure Membrane
- Application
- ETP, STP, Oil Mills, Paper Mill, Coal Mining, Iron Recovery
- Brand
- Sunshine
- Origin
- China
Filtration area, plate size, number of chambers, pressure and cake dryness depend on the model and your sludge. Send us your sludge data and our engineers will confirm the right size.
Filter Press vs Belt Press vs Centrifuge
All three dewater sludge. They differ in cake dryness, running style and energy use.
| Feature | Filter Press | Belt Filter Press | Centrifuge |
|---|---|---|---|
| Operation | Batch: fill, press, open, discharge | Continuous | Continuous |
| Cake dryness | Usually the driest. Reports say often 10 to 15% drier than belt presses | Commonly mid-teens to low-30s % dry solids, depending on sludge and polymer | Often 5 to 10% drier than belt presses |
| Filtrate quality | Clear filtrate reported | Varies with belt condition and polymer | Depends on polymer and feed |
| Energy use | Feed pump and hydraulics | Low to moderate | Higher. One US study reported about 120% more electricity than a belt press |
| Weak points | Batch handling, cloth washing, cake release from cloth | Belt blinding when oil, grease or solids vary | Higher energy and wear |
| Best fit | Small to medium sludge volumes where a dry cake cuts disposal cost | Steady high volumes of conditioned sludge | Large continuous flows with limited space |
Values are typical figures from engineering articles and studies. Dry solids in dewatered cake range widely, from about 10% to 45%, depending on sludge type and machine. Always confirm against the datasheet of the exact model.
How a Filter Press Works
- Plates CloseA hydraulic cylinder presses the cloth-covered plates together into sealed chambers.
- Sludge Is Pumped InA feed pump, often an air operated diaphragm pump, fills the chambers under pressure.
- Filtrate DrainsWater passes through the cloth and leaves by the filtrate ports while solids build a cake on the cloth.
- Membrane Squeeze (Membrane Types)Plates inflate with water or air and press the cake again to push out more liquid.
- Press Opens, Cake DropsThe plates separate and the solid cake falls out. The cycle then repeats.
Key Benefits
Sludge is costly to store, haul and dispose of. Removing water is the simplest way to shrink it.
- Drier cake than belt presses in many cases, which means less volume to haul
- Four press types, from general hydraulic to programmable automatic and membrane
- Membrane models squeeze the cake again, which reports link to drier cake and shorter cycles
- Clear filtrate that can be sent back to the ETP for further treatment
- Works with many sludges: ETP, STP, oil mill, paper mill, coal and iron recovery
- Local engineering and after-sales support from Techno Bangla
Which Filter Press Type Fits Your Plant?
Choose a Membrane Press When
- Disposal cost is high and every point of cake dryness counts
- You want shorter press cycles and steady dryness from batch to batch
- Compressed air or a water supply for membrane squeeze is available
- You accept that membrane plates flex each cycle and may wear sooner
- Pick the high-pressure PP membrane or high-pressure membrane model
Choose a General Hydraulic Press When
- The sludge volume is small to medium and a simple machine is enough
- You prefer fewer parts to maintain
- Cake dryness from feed pressure alone meets your disposal needs
- Need less manual work? Ask about the programmable automatic model with plate shifting and cloth washing
Where Filter Presses Are Used
Any process that produces a slurry or sludge that must be separated into solid cake and liquid.
- ETP Sludge
- STP Sludge
- Textile Dyeing Sludge
- Oil Mills
- Paper Mill
- Coal Mining
- Iron Recovery
- Chemical Precipitation Sludge
How to Choose the Right Filter Press
Share these details with our engineers and we will recommend a suitable model and size.
- Sludge type and daily load. Give sludge volume, solids percentage and source. Dry solids per day sets the chamber volume and number of plates.
- Target cake dryness. Ask what your disposal route needs. Cake dryness and cycle time come from lab or pilot tests, not from a single catalog figure.
- Pressure and type. Feed pressures of about 7 to 15 bar are common, with high-pressure designs reaching 15 to 30 bar (about 1.5 to 3 MPa). Membrane squeeze adds extra pressure.
- Feed pump and air. Match the pump to the press. High-pressure diaphragm pumps are widely used and need enough compressed air.
- Conditioning and cloth care. Lime, ferric salts or polymer prepare the sludge. A change of polymer can give sloppy cake, and dirty cloth will not build good cake.
Why Sludge Dewatering Matters in Bangladesh
Textile ETP sludge in Bangladesh is currently treated as hazardous waste, and the factory that produces it is responsible for handling it properly. Disposal options are limited, so less volume means fewer trips and lower handling cost.
A filter press reduces volume by removing water. It does not change what is in the sludge, so keep following the sludge rules for your factory. See our ETP plant page for complete plant solutions.
Installation and After-Sales Support
Techno Bangla Creation supplies treatment plant equipment together with installation, commissioning and after-sales support for factories, businesses and organizations across Bangladesh.
Our team is based in Mohakhali, Dhaka. Send your sludge data and our engineers will recommend a suitable filter press. Use a mixing agitator and chemical dosing pump for sludge conditioning before the press.
Frequently Asked Questions
What is a filter press?
A filter press is a batch machine that separates solids from liquid under pressure. Sludge is pumped into chambers between cloth-covered plates, the water passes through the cloth, and a solid cake stays behind. In ETP and STP plants it dewaters sludge so it is easier and cheaper to handle.
How does a filter press work?
Plates close, a feed pump fills the chambers, and filtrate drains through the cloth while cake builds up. When the chambers are full, feeding stops. Membrane models then inflate to squeeze the cake again. The press opens, the cake drops out, and the cycle starts over.
What is the difference between a filter press and a belt press?
A filter press works in batches and usually gives a drier cake, often reported as 10 to 15% drier than a belt press. A belt press runs continuously and suits steady, high volumes of conditioned sludge. The better choice depends on your sludge, volume and disposal cost.
How dry is the cake from a filter press?
Cake dryness depends on the sludge, conditioning and press type. Across dewatering machines, dry solids in cake range from about 10% to 45%. Membrane presses generally give drier cake than standard chamber presses. Lab or pilot tests on your sludge give the reliable figure, so ask us before you buy.
Should I choose a membrane or a standard chamber filter press?
Membrane presses squeeze the cake after filling, which reports link to drier cake and shorter cycles, but membranes flex every cycle and may wear sooner. Standard chamber presses are simpler with fewer parts to maintain. Choose by disposal cost, sludge type and how much upkeep you can manage.
What pump feeds a filter press?
High-pressure air operated double-diaphragm pumps are widely used because the rising pressure in the chambers slows the feed automatically. Piston-diaphragm and other pumps are also used. The pump needs enough pressure and compressed air for your press, so our engineers check this during selection.
Do I need chemicals before the filter press?
Most sludges dewater better after conditioning. Lime, ferric salts or polymer are commonly used, and the choice depends on your sludge. Changing the chemical can change cake quality, so test first. Conditioning needs mixing and dosing equipment, which we also supply alongside the press.
How can I get a quotation for a filter press?
Send your sludge type, daily volume, solids percentage and target cake dryness to our engineers by phone or email. We reply with a free quotation for your ETP, WTP, STP or water treatment equipment, including the feed pump and installation support.
