Walnut Shell Filter Media

Walnut Shell Filter Media

Walnut shell filter media refers to a type of filtration material made from crushed walnut shells. The shells are typically crushed into granules of different sizes to create a filter media with a high surface area.

Walnut shell filter media is often used in water treatment processes, such as in sand filters or multimedia filters, to remove suspended solids, sediment, oil and organic matter from water.

Walnut shell filters are commonly used in various industries, including automotive, manufacturing, and oil and gas, for the removal of oil and other contaminants from liquids. Walnut shells have a high affinity for oil, allowing them to adsorb and retain oil molecules while allowing clean oil to pass through. This makes walnut shell filters useful for applications such as coolant filtration, hydraulic oil filtration, and oil wastewater treatment.

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Starke Filter Media offers the highest quality Walnut Shell Filter Media To get the same day quote.


  • Ability to efficiently remove contaminants while minimizing pressure drop and maintaining a high flow rate.
  • The irregular shape of the granules provides excellent particle trapping and enhances the filtration efficiency.
  • Walnut shell media are also chemically inert and do not release harmful substances into the water.
  • Walnut shell filter media has a relatively long lifespan, and it can be regenerated and reused multiple times.
  • Walnut shell media have a natural hardness and durability, allowing them to withstand the pressure and abrasion involved in the filtration process.
  • It’s environmentally friendly in nature, can be easily disposed of or recycled, as the shells are biodegradable and non-toxic.


Filtering Media Type Silica Sand Walnut Shell
Oil Removal Rate (%) 40 – 50 84 – 93
Suspended Solids Removal Rate (%) 50 – 65 85 – 96
Filtering Speed (m/h) 8 – 12 25 – 30
Backwashing Strength (L/S.m2) 16 6 – 7
Filtering Media Maintenance Method Replace every 2-3 years Add 10% every year

Walnut Shell Filters will typically remove 95% of solids at 5 micron, and 90% of suspended oil.

Starke Walnut Shell Filter Media comes in different packaging sizes to meet the diverse needs of our clients. The packaging is available in 25 kg bags, 500 kg super sacks and with an assurance of timely delivery.

Not sure how much quantity you need. Please use our volume calculator.