https://www.slb.com/products-and-services/innovating-in-oil-and-gas/well-production/processing-and-separation/produced-water-treatment/petreco-hydromation-walnut-shell-media-filter
PETRECO HYDROMATION Walnut Shell Media Filter | SLB
Deep-bed nutshell media filter reliably and effectively removes oil and suspended solids during produced water treatment.
walnut shell mediafilterslb