【Hazards】

Iron and manganese in the ground (well) water in almost the same time，the higher iron content in water，the water has iron smell, the taste of water，as the paper，textile，printing and dyeing，leather, fine chemicals and other production water will be Reduce product quality，easy to create resins used for boiler feed water pollution to the softening efficiency。Occurrence of iron rust water can produce appliances，washing clothes will appear yellow or brown stain stains，iron precipitate Fe2O3 iron bacteria will grow，blocking the pipes，sometimes the red water。The high manganese content of water and high iron content in a similar situation， such as the water color，smell, taste, damage the textile，paper making，brewing, food and other quality of industrial products, household appliances will become brown or black pollution ，Washing clothes in black or light gray stain will stain slightly。To this end China's "drinking water health standards"(GB5749-85) provides that iron content ≤ 0.3 ㎎ / L, Mn ≤ 0.1 ㎎ / L， exceeding the standard is subject to the raw water iron and manganese removal treatment。 Prolonged high consumption of iron-manganese content of the water will seriously affect the health and strong corrosion of equipment。

【Work principle】
In addition to iron and manganese oxide devices are generally used method in water and low-cost low-cost iron oxidation of manganese ions into the high iron and high manganese ions，the dissolved divalent iron or divalent manganese are oxidized into insoluble trivalent Tetravalent iron or manganese compounds，and then removed through the adsorption filter，to reduce the water head in iron and manganese content。

【Technology process】

First, by forcing aerated，so that ferrous iron，manganese and iron ions are oxidized at high prices，the formation of insoluble hydroxide，and then from top to bottom through the adsorption of manganese sand tank filtered high quality iron and manganese content decreases，and finally，Obliterated by backwash sand surface adsorbed manganese hydroxide，manganese sand to restore the original except that the effect of iron and manganese

【Technical Requirements】

Iron and manganese from groundwater except for the natural manganese sand，the manganese form of manganese oxide should be based。Manganese content (as MnO2 dollars) of not less than 35% of the natural manganese sand filter, both for the groundwater in addition to iron， and manganese can be used for groundwater；manganese content of 20% to 30% of natural manganese sand filter Should only be used underground iron；Manganese content of less than 20% of the manganese ore is not used；Should be given priority through scientific testing or production use has proven to be a good addition to the effect of iron and manganese species for natural manganese sand filter。