Iron and Manganese Filter System Guard Equipment Running

Iron and manganese filter system is composed of manganese sand filter material, aeration device, multiport control valves and FRP tanks (carbon steel or stainless steel tanks are also available) as the main filter system parts or components.

Iron and manganese filter system can help to remove the extra iron and manganese ions to guard people healthy and guarantee industrial production smoothly running.

A flow chart of iron and manganese filter system working.
  • Filter tank. It commonly set two FRP tanks in the system: one is for aeration and one is for filter. You should decide the content of FRP tanks according to your flow.
  • Media. This system adopts natural manganese sand as the filter material to effectively removes iron and manganese ions.
  • Water distributor. Top distributor can help to achieve falling aeration of raw water and evenly distribution in the filtering tank. Bottom distributor can block impurities and help treated water flows out.
  • Multiport control valves. Runxin control valves are available to save pipeline placement and make filter running more efficient.

Iron and manganese filter system can effectively remove the extra iron and manganese ion in the underground water. It can provide qualified water quality for the following pre-filter systems and guarantee the equipment smooth running.

Treated Elements

  • Iron ion
  • Manganese ion

Water Quality

  • Iron content ≤ 0.3 mg/L.
  • Manganese content ≤ 0.1 mg/L
Working Principle

Aeration. Raw water is pumped into the aeration tank through the pump. After two aeration (Impeller aeration and falling aeration), water and air fully mixed, part of the low-valent iron and manganese ions are oxidized into high-valent iron and manganese ions, generating part of the iron hydroxide and manganese oxide precipitates, while through the exhaust valve with the aeration tank air pressure and water pressure changes intermittently from the exhaust port discharge CO2 exhaust gas, so that the dissolved oxygen water pH alkaline (in addition to iron and manganese need to be carried out in alkaline water).

Filter & Backwash. The dissolved oxygen water fully mixed with oxygen enters the filter tank and flows through the natural manganese sand layer. Under the catalytic effect of manganese sand, divalent iron and manganese ions are oxidized to high valent iron and manganese ions and hydroxide precipitates are generated, and clean water is obtained by the filtering effect of manganese sand. Through the backwashing function of the filter valve, the hydroxide precipitates and impurities in the manganese sand are discharged from the filter tank by regular backwashing.

A flow chart of iron and manganese filter system working.


  • When the iron and manganese content of raw water is high, the iron content is more than 5 mg/L and the manganese content is more than 1.5 mg/L, because iron is easier to be oxidized than manganese, if manganese sand is used for treatment at the same time, it is difficult for the divalent manganese to be oxidized to tetravalent manganese. Therefore, it is generally necessary to use the secondary filtration method, that is, to use the first iron removal, so that the concentration of Fe2+ is lower than 2mg/L, and then manganese removal. The process is: Groundwater → Pump → Aeration → Primary filtration (iron removal) → Secondary filtration (manganese removal).
  • When the iron and manganese content in raw water is low, with iron content lower than 5mg/L and manganese content lower than 1.5 mg/L, it can be removed by primary filtration. The process is: Groundwater → Deep well pump (variable frequency pump) → Aeration → Filtration (iron and manganese removal).
  • Pre-filtration of Disinfection equipment.
  • Preparation for ultra and RO filtration.
  • Recirculation system.
  • Rinse water processes.
  • Irrigation system.
  • Basin water filtration.
  • Ground water filtration.
  • Waste water treatment