Iron and Manganese Removal Filter for Deep Well Water

Technical Parameter

1. Processing Effect:

① Iron content: ≤ 0.3mg/L;

② Manganese content: ≤ 0.1mg/L;

③ Effluent turbidity:<3FTU.

2. Water Inlet Requirements:

① Iron Content: ≤ 20mg/L;

② Manganese Content: ≤ 3mg/L;

③ Influent Turbidity:<20FTU;

④ Alkalinity: ≤ 2mg/L;

⑤ pH Value:>6.0 (for iron removal), >7.5 (for manganese removal).

3. Working Environment Parameters

①Working Temperature:5-60℃ (special temperatures can be customized);

② Working Pressure: ≤ 0.6MPa.

4. Operating Parameters

① Working Mode: pressure type;

② Operation Mode: Water flow from top to bottom, in series (high iron and manganese content) or parallel;

③ Filtering Speed: 6-10m/h (for iron removal), 5-8m/h (for manganese removal);

④ Operating Cycle: Depending on the quality of the raw water, the minimum should not be less than 8 hours;

⑤ Backwashing Method: water washing, or a combination of air and water backwashing;

⑥ Backwashing Time: 10-15 minutes;

⑦ Backwashing Water Consumption: 1-3%;

Working Principle

The iron and manganese removal filter uses natural manganese sand as the filter medium. The principle of iron removal is that the divalent iron ions in groundwater are adsorbed by the biofilm covering the surface of the filter material after aeration and filtered through the filter layer, and are oxidized by dissolved oxygen under the action of catalysis, and are adsorbed on the filter layer. On the material, the ferric iron oxide generated by oxidation serves as a new filter membrane to participate in a new catalytic reaction. The produced water will run a cycle of backwashing to flush away the excess oxides. The principle of manganese removal is the same as above. Due to the ion selective absorption principle, the filter layer removes iron first and then manganese. When the pH value is equal to 6.8-7.2, Fe (OH) 3 forms a colloid coagulation and precipitates, which can be removed by filtration. When iron-containing groundwater is filtered through a natural manganese sand filter layer, the manganese sand filter layer plays two roles in affecting the iron content in the water:

1. Catalysis and oxidation, accelerating the oxidation of ferrous iron into ferric iron in water;

2. The interception and separation function separates the iron from the water and intercepts it in the filter layer. These two functions are generally completed simultaneously in the manganese sand filter layer.

Workmanship Standards

Incoming Water Source: Groundwater, Well Water.

Effluent Water Quality: Domestic water, No Color or Odor, Meeting Domestic Water Standards.

The Required Configuration of the Filtration System: Well water self-priming pump, aeration device, sedimentation tank, raw water booster pump, iron and manganese remover, activated carbon filter, purification tank.

System Water Production Rate: 95%.

Work Process

1. When the iron concentration in the groundwater is 5~10mg/l and the manganese concentration is 1~2mg/l, or when the groundwater only contains iron but no manganese and the iron concentration is around 10mg/l, aeration can be used ——Single-stage iron and manganese removal filtration. Process flow: groundwater → deep well pump → aeration device → water tank → filter pump → iron and manganese removal device → reservoir → user..

2. If the iron and manganese content in the groundwater is high, that is, when iron is greater than 10mg/l and manganese is greater than 2mg/l, aeration-dual-stage iron and manganese removal filtration should be used. Process flow: groundwater → deep well pump → aeration device → water tank → filter pump → primary iron and manganese removal device → secondary iron and manganese removal device → reservoir → user..

Function Introduction

1. Aeration Device

Filter Material: Fiberglass

Function: Use the residual pressure of the well water pump to inhale air and fully mix oxygen with iron to achieve the purpose of oxidizing iron in the water.

2. Booster Pump

Provide pressure for the rear filter.

3. Iron and Manganese Removal Filter

Filter Material: Manganese Sand

Function: Use natural manganese sand as filter medium. The principle of iron removal is that the divalent iron ions in groundwater are adsorbed by the biofilm covering the surface of the filter material after aeration and filtered through the filter layer, and are oxidized by dissolved oxygen under the action of catalysis, and are adsorbed on the filter layer. On the material, the ferric iron oxide generated by oxidation serves as a new filter membrane to participate in a new catalytic reaction. The produced water will run a cycle of backwashing to flush away the excess oxides. The principle of manganese removal is the same as above. Due to the ion selective absorption principle, the filter layer removes iron first and then manganese. When the pH value is equal to 6.8-7.2, Fe (OH) 3 forms a colloid coagulation and precipitates, which can be removed by filtration. When iron-containing groundwater is filtered through a natural manganese sand filter layer, the manganese sand filter layer plays two roles in affecting the iron content in the water:

1. Catalysis and oxidation, accelerating the oxidation of ferrous iron into ferric iron in water;

2. The interception and separation function separates the iron from the water and intercepts it in the filter layer; 

These two functions are generally completed simultaneously in the manganese sand filter layer.

Application

◆ Industrial process water filtration: such as water protection filtration for nozzles and heat exchange stations

◆Industrial circulating water filtration: steel, metallurgy, papermaking, heat exchanger, electric power, petrochemical, food, air conditioning system and other industries.

◆ Raw water treatment and filtration: well water, river water, river water, lake water, etc.

◆ Irrigation filtration: water filtration for farmland, parks, municipalities and golf courses

◆ Water filtration in aquaculture, swimming and water park industries.