New type of iron and manganese removalfilterWorking principle

Application scope of iron removal filter material

　　1Remove iron and manganese from groundwater.useIron removalThe filter material is used to treat high-speed rail and high manganese water, ensuring safe and reliable operation, and stable water quality that meets standards. It can be qualified for the initial operation of iron removal, and its "maturity period" for manganese removal is greatly shortened. To remove iron and manganese using manganese sand and quartz sand, an active filter membrane must be formed on the surface of the filter material in order to remove iron and manganese.

　　2Surface water purification treatment.Iron removalFilter media is used to treat surface water such as rivers, lakes, and ponds, which can effectively remove turbidity, color, odor, and adsorb some heavy metal ions.
　　3Deep purification of tap water.During the pipeline transportation and secondary pressurization process, tap water will generate secondary pollution, which can be usedIron removalThe filter material is purified to ensure that the water quality meets the national standard for drinking water hygiene.
　　4Ultrafiltration and reverse osmosis pretreatment.Ultrafiltration, reverse osmosis, ion exchange, etc. all have strict requirements for the inlet waterIron removalAs a pre-treatment, the filter material not only has better water purification effect, but also can share the backwash pump with activated carbon.

Principle of iron and manganese removal by filter media

Iron removalThe main mechanism why filter media has good iron and manganese removal and water purification effects is the comprehensive effect of adsorption filtration and flocculation sedimentation.

1Adsorption and filtration function.Iron removalThe filter material has a porous structure with a rough surface and a porosity of over 50%. It has a large specific surface area and high surface energy, and has good physical filtration and chemical adsorption effects on iron, manganese, and various pollutants in water.

2Flocculation and sedimentation.Iron removalThe main components of filter media are silicon, iron, and aluminum, which are beneficial for purifying water quality by removing iron and manganese. Especially, the iron and aluminum salts formed by the dissolution of iron and aluminum in water are good coagulants, which have flocculation and sedimentation effects on iron, manganese, and various pollutants in water.

3The most prominent feature.Iron removalThe most prominent feature of using filter media for iron removal in drinking water is that it does not require the cultivation of active filter membranes, and the initial effluent can meet the standard. This feature has opened up a simple and feasible new path for the removal of iron and manganese from groundwater, which can be considered an innovation. The reason why it is possible to remove iron without cultivating an active filter membrane is mainly becauseIron removalThe filter material is porous particles with a large adsorption capacity and a long filtration adsorption section.

　Process flow of iron and manganese removal

1 First level processing technology flow.When the iron content of the raw water is ≤ 5mg/L or the manganese content is ＜ 1.5mg/L, primary treatment can be used, and the process flow is shown in the figure　

　Equipment Selection Guide

　　1Analyze and test the raw water.To ensure the effectiveness of iron and manganese removal, the local health and epidemic prevention department or water supply company should be invited to inspect the raw water before determining the design plan. It is best to conduct a full analysis according to the national standard GB5749-85 water quality standard. At least 7 indicators that affect the effectiveness of iron and manganese removal should be tested, including iron, manganese, value, total alkalinity, silicon dioxide, total hardness, ammonia nitrogen, etc.

　2. Determine the process flow based on water quality.Based on the results of raw water inspection, conduct comprehensive analysis and judgment to determine a practical process flow. If using primary treatment or secondary treatment, what method should be chosen for oxidation aeration, etc.

　　3Determine the specifications and models of the equipment.After determining the process flow, calculate the design treatment water volume, flow rate, and other parameters according to user needs. Refer to Table 2 or Table 3 to find the suitable product model for use.

　　4If the parameters do not match, they can be designed individually.When the technical parameters of the products listed in Tables 2 and 3 do not match the actual needs, they can be designed and processed separately.

Usage management requirements

1Persist in backwashing and regenerating on time.Backwashing and regeneration are key to ensuring the effectiveness of water purification, and the filter should be backwashed and regenerated in a timely manner after one cycle of operation. To ensure the water purification effect and prevent the filter material from becoming clogged, the filter must be backwashed every 3 days using a single tank backwash for 8-12 minutes each time.

2The filter material should be replaced in a timely manner.In the filterIron removalFilter media should usually be replaced every 3 years, and proper management can extend its service life. The replacement cycle of filter media is directly related to management. If the filter media is not backwashed in a timely manner, it will become clogged and lose its purification effect. When the quality of purified water cannot be guaranteed, materials should be replaced in a timely manner.

3Reasonable selection of water pumps is necessary.The flow rate and head of the water pump must be consistent with the design parameters. Improper selection can affect the effectiveness of iron and manganese removal as well as backwashing.