Nutshell media because of their hardness, ideal weight, porous and multi-faceted, and by the special physical and chemical treatment (pigments, fat, oil, electricity and pay particle refining and clean). It has a strong breaking process in water treatment. In addition to solid particles, easy backwashing and excellent performance, widely used in oily wastewater treatment, industrial wastewater treatment and residential water treatment. Improve water quality, water treatment significantly reduced the cost of a new generation of media. Technical specifications Specification test data test data test items 90-95% oil removal backwashing intensity 25m3 / m2 · h suspended solids removal 95-98% water flushing pressure 0.32mpa filtration rate 20 -25m / h per year in maintenance mode add 5 -10% share of 1.5g / cm3 bulk density of 0.8g / cm3