... effectively get rid of muddy organic matter, iron, manganese and oxide; filter suspended substance, colloid, remained oxygen of microorganism and ... of mineral water.2. the construction of the machineSilica sand filter The equipment is a hermetically sealed chamber made of 1 ... heavy metal such as mercury,lead,cadimium,zinc,iron,manganese and Chromium,and hydrogenate,sulphide,small amount of remaining ...