Introduction

Media filtration has numerous applications. Common applications are for the reduction of turbidity and suspended solids or removing oxidants, chemical contaminants or taste and odour impurities. Media filtration is considered a simple mechanical process however it involves numerous mechanisms. These include physical and chemical adsorption, straining, interceptions, sedimentation, diffusion and inertial compaction. Different media types have different strengths that should be matched to the application.  More specialised media filtration techniques targeting specific areas of water chemistry or foulants, such as pH correction or iron & manganese reduction to name a few, are also available. Xion Water have a range of standard systems or bespoke pressure filtration designs that can be tailored to your individual requirements.

MMF is widely used in the municipal and industrial water treatment industries to reduce the turbidity and suspended particle levels within raw water supplies. 

A number of media types can be used, either a single media such as the Xion Water supplied Advanced Filter Media (AFM) or multiple media’s used together, often comprising of anthracite, sand and garnet. In systems where multiple media types are used they are filled into the filter vessel in stratified layers. The coarser media will be at top and each layer gets progressively finer. This graduation in media sizes allows the full depth of the bed to be used to capture suspended particles improving the system efficiency and run time. 

Granular Activated Carbon (GAC) 

GAC can be used for a variety of roles including removal of: 

• Chlorine and chloramines 

• Pesticides and other chemical compounds 

• Taste and colour taints 

   

GAC has a highly porous structure that provides a large surface area for compounds to be adsorbed and removed from the water stream.  

Iron & Manganese Removal Media 

A range of media is available for the oxidation/catalytic reduction and filter removal of: 

• Soluble ferrous iron and manganese 
• Insoluble ferric iron and manganese
• Colloidal iron 
• Organic iron 

Other Media

Xion Water stock and supply a wide range of filter media for common and specialised roles. Contact us today and allow our technical team to help.

Multi-Media Filtration (MMF)

Benefits of Media Filtration

• High quality, reliable water source 

• Provides clean water for downstream applications 

• Non-hazardous waste stream 

• Simple, robust technology 

• Various media types can be selected to suit the application

Technical Details

See the Xion ‘Knowledge Hub’ to find a wealth of material covering the theory of media filtration and helpful hints on typical troubleshooting and plant operation.

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Get in touch today for further information on Media Filtration - Our team are ready to help. Call us today on 01733 666655 or email us hello@xionwater.com

The pressurised media filtration process passes water into a pressure vessel, usually from top to bottom, and through a filter bed containing the filtration media. As the water passes down through the media it captures the suspended solids and particulates within the filter bed and the clean water exits the bottom of the vessel. As the filter bed accumulates suspended solids and particles the differential pressure across the bed increases. When the differential pressure reaches a pre-set value or after a fixed time the filter bed is backwashed. During the backwash the direction of flow through the bed is reversed, from bottom to top, which fluidises the bed and removes the captured solids out with the waste water stream. After completion of the backwash the filter bed is rinsed in the operational flow direction to drain allowing the filter bed to settle and re-establish the outlet water quality.

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Media Filtration and it's Applications

Distribution Nozzles & Media Traps

Service & Support​