The Dual Media Filter (DMF) is perfect for removing very small suspended materials such as mud, dust particles, and biological growth from water.
DMF is a vessel with a manhole, top and bottom flange covers, supports, raw water distributor, underdrain collection, and backwash water jet system made of welded mild steel, FRP, and SS
In India, wastewater treatment plants use a mechanical method called media filtering. In this case, both chemical and physical absorption processes are utilised. Straining, sedimentation, interception, and diffusion are the four critical steps in media filtering. Inertial compaction is the final stage.
Water travels through mediums with considerably smaller pores in a dual media filter. The biggest molecules are exuded by anthracite. The next layer eliminates particles by combining the adhesion and straining properties of sand and garnet. Filters do not block as quickly in many filtration processes as they do in a single filtration operation. It's primarily due to the dual media filter's numerous depths or filters.
The turbidity and suspended debris are maintained on the sand top as the treated water runs downward through the filter bed.
Filtered water is collected by an underdrain system in the vessel's bottom and pumped to the service outlet.
| Flow | 1 M3/hr to 400 M3/hr |
| Diameter (Vertical Vessel) | 0.2 Mts. - 4 Mts. |
| Inlet TSS | Up To 75 Mg/l |
| Inlet Turbidity | Up To 40 NTU |
| MOC | FRP / Mid Steel / Stainless Steel Coating / lining : Epoxy / FRP / Rubber Lined |
| Removal | Turbidity,TSS |
| Design Pressure | Up To 10 Bar |
| Working Pressure | 1.1 to 3.5 Bar |
| Operational Valve | Automatic/Manual |
| distribution system | FRP/Strainer Plate |
| Flow Monitoring | Rotameter |
| Pressure Monitoring | Pressure Guage,Diffrential Pressuere Transmitter |
How Does it Work?
Various water treatment plants employ Dual Media Filter Water technology. It is mostly due to its efficient structure and twofold filtration method.
In dual media filters, an automatic backwashing mechanism is employed to help maintain unit efficiency.
Water travels through mediums with considerably smaller pores in a dual media filter. The biggest molecules are exuded by anthracite. The next layer eliminates particles by combining the adhesion and straining properties of sand and garnet. Filters do not block as quickly in many filtration processes as they do in a single filtration operation. It's primarily due to the dual media filter's numerous depths or filters.
For better flow rates and a smaller footprint, the Dual Media Filter Water Treatment combines Filter Media and Anthracite. High filtration velocities are accomplished by careful media selection and distribution and collection system design.
With face piping and accompanying Valves, these filters are available in Mild Steel, FRP, or SS construction.
Here are the three most popular types of dual media filters:
Filters made of calcite
Calcite is a mineral that can be found in the natural world. As a result, it is economical. Calcite filters can help to raise the pH of water. They also can neutralise the water. Because of this, pipe squeezing can be avoided.
Filters made of anthracite
In dual media filters, this filter is used with sand. It has lower gravity than sand, which makes it more suited. It can also withstand chemicals due to its high carbon concentration. It is regarded as one of the most effective methods for removing suspended solids and turbidity. Anthracite is utilised as a carrier in biofilm treatment. It also facilitates the development of micro-flocks.
Filters with Activated Charcoal
Oxygen is used to cure charcoal, which is carbon. Small pores form between the carbon atoms, allowing contaminants from liquids and gasses to be absorbed.
Activated charcoal filters are used to remove organic debris, chlorine, and disinfectants from water. They're also known to make water taste better. This method saves oxidation when used before any other filtration method, like reverse osmosis.
Dual Media Filters are used in a variety of situations.
Dual media filters are used when water is contaminated with turbidity, iron, suspended particles, and other contaminants. They are one of the most efficient methods for removing pollutants in a variety of situations.
Drinking-Water Treatment
Pre-treatment in RO process
Pre-treatment in the desalination process
Swimming Pool Water Treatment
Wastewater Treatment
Ground Water Treatment
Process Water Treatment
Used in full stream filter
Used in side stream filter
The Advantages of Dual Media Filters
Dual filters are more effective in attracting huge amounts of particles in water than traditional sand media filters. This is due to the numerous filter layers with varying degrees of pores.
When compared to sand media filters, another difference is that dual media filters last longer. This is due to the dual media filter bed being completely utilized.
The following are some additional advantages:
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