When the issue is the removal of oil and suspended solids from difficult water streams, the Nutshell Filter often represents the most efficient and reliable treatment technology.
The most common application of this technology is the treatment of produced water at oil fields however nutshell filters are also applied for waste water treatment in refineries and petrochemical industries (e.g. in water reuse plants, upstream of membrane systems), or to treat water used for direct cooling in the steel industry.
Unidro’s Nutshell Filters are the result of our experience in media filtration, our know-how in dealing with produced water applications and our performance success in varying conditions and situations.
With Unidro Nutshell Filters, the media is effectively backwashed thanks to a proper fluidization of the filter bed by a high flow of scouring gas. This gas is injected into the filter media through specially designed distributors.
A higher filtration grade may be obtained with our special media selection and our polishing layers.
The performances of Unidro’s Nutshell Filters delivers a reduction of oil content to less than 1 ppm in treated water and the 99% removal of solid particles greater than 10 µm.