Is walnut shell filtration effective for free oil removal? Has anyone used it?

Question

Is walnut shell filtration effective for free oil removal? Has anyone used it? thanks in advance.

Ulf Mischke · Answer

in fact, "...The first is a separator made of corrugated sheet metal, which removes the largest amount of oil and suspended solids. Then the water flows through flotation cells where injected gas or oxygen attach to the oil droplets or particles, so that they can be skimmed off. Finally, the water is forced through filter chambers filled with walnut shells. The shells have the property of remaining oil and impurities absorb. "Other filter materials such as rice and palm kernels would also work. But walnut shells come with the pressure and the temperature works best for you, "says Suarez..." For more info: http://www.energy.siemens.com/hq/apps/search/en/index.php?collapse=true&SCSConfig=ENERGYSIEMENSCOM-WWWHQEN&class=search%2Cbanner%2Ctext&q=walnut+shells

pratham nayak · Answer

Black walnut shells have been known to have an affinity for oil for a long time. Pulverized walnut shells are used in the cosmetic industry to take oil off skin. Walnut shell media is adsorbent to oil, meaning that the free oil will adhere to the surface of the media but not be absorbed into the media. This allows for cleaning and regeneration of the media. Walnut shell media has the proper hardness and modulus of elasticity which enable it to have an attrition rate of only 7% per year.

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