Equipment Overview water contains iron (manganese) or a small amount also cause harm. 1, the occurrence of iron bacteria breeding to produce a reddish-brown ooze, attached to the water supply system or the cooling water system and cause harm in the production process. Iron in drinking water harmful to humans, but water produce astringency or metallic smell, the use of this water can make the food taste bad. 3, the iron in the water by precipitation or attached to the object, it will have brown spots, spots on fabric washing, dyeing and paper industry is one of the reasons for the decline in product quality. 4, water containing traces of manganese also directly on the fiber, dyeing, photographic film, starch, brewing industry. Working principle of iron (manganese) groundwater by gassing or oxidant, iron in water (Mn) ion oxide, manganese sand filter layer when water flows through the filter layer the contact oxidation reaction and the filter surface biochemical role set to stay and physical adsorption, removal of iron in water (manganese) ion precipitation. Especially in the process of treatment of slightly polluted manganese groundwater, iron bacteria can not only effectively remove iron and manganese, as well as ammonia in water for nutrition, metabolism, while achieving the participation of other bacteria to ammonia effect. For groundwater, river water, well water, tap water to remove heavy metals. The present device can remove the water up to 99% of chlorine, 98% of the heavy metals, such as Fe, Pb, Mn, Cd, Ce, Ag, Ar, Al, Se, Cu, Hg. In addition, by means of precipitation in the medium, KD redox reaction occurs, can also reduce the water carbonates, nitrates and sulfur suan salt content, to reduce fouling substances, hydrogen sulfide removal, divalent iron to remove arsenic, fluorine, biocide, etc. . Main technical parameters of the filtration rate: 7 to 10m / h (single), 10 to 12 m / h (double), the largest of more than 15 m / h water turbidity: ≤ 15 mg / L water turbidity: ≤ 5 mg / L Operating temperature: room temperature; Working pressure: ≤ 0.6Mpa backwash volume of compressed air :18-25L / m2.S filter storey: 1000 to 1200 mm backwash intensity: 15L / m2 · s (single), 12 L/m2.s (double) backwash time: 4 to 6 minutes