... high porosity, etc. Under the same conditions, ceramic filter grains enjoy faster filtration speed, longer regeneration cycle, ... organic ammonia and nitrite.Chemical composition of ceramic filter grains:NameSiO2Al2O3Fe2O3CaOMgOKO2+Na2OLoss on ignitionContent59.8816-251-03 ... filtration pool, multi-layer filtration pool or mechanical filter to treat various industrial sewage, industrial water, city ...