Introduction to quartz sand filter

A manganese sand filter, also known as an iron manganese filter, is a water treatment equipment specially designed to remove iron, manganese ions, and some organic matter and suspended matter in water. The core of the filter is the use of manganese sand with special oxidation-reducing properties as the filter material. Manganese sand filters play an important role in many industries and household water treatment because of their high efficiency in removing iron and manganese and significantly improving water quality.

Quartz sand filter composition

The manganese sand filter is usually composed of a filter material layer, a support layer, a filter housing, a water distribution system, a water collection system, a backwash system, and a control system. The filter material layer of manganese sand is the core of the filter, which is filled with quartz sand of different particle sizes. The support layer is used to fix the filter material and maintain the stability of the filter layer; The shell is usually made of stainless steel, carbon steel, or glass fiber-reinforced plastic and lined with anti-corrosion materials; The Water distribution system to ensure uniform distribution of raw water; The water collection system collects filtered clean water; The backwash system is used to clean the filter material and restore the filtration performance. The control system automates operations such as backwashing.

Manganese sand filter for industry

Manganese sand filter is a special water treatment equipment, mainly used to remove iron, manganese, and other heavy metal ions in water, as well as some organic matter and suspended matter, so its application in a wide range of industries, mainly includes but not limited to the following areas:
1. Drinking water treatment: In the drinking water treatment of water plants and residential communities, a manganese sand filter can effectively reduce the iron and manganese content of water, and improve the safety and taste of drinking water.
2. Groundwater treatment: For groundwater rich in iron and manganese, a manganese sand filter is an essential pretreatment equipment, which can effectively solve the problem of "red water" and "black water", and is suitable for groundwater purification in villas, farms, hot springs, and other places.
3. Industrial water: In chemical, electric power, steel, textile, paper, and other industries, manganese sand filters can remove iron and manganese ions in industrial water, protect production equipment, prevent corrosion of pipelines and equipment, and extend the service life of the equipment.
4. Pool water treatment: In pool water treatment, the manganese sand filter helps to remove iron and manganese ions that may cause water discoloration, keep the water clear, and improve the swimming experience.
5. Agricultural irrigation: If the agricultural irrigation water contains too much iron and manganese, it will affect the growth of crops. The manganese sand filter can purify the irrigation water and ensure the healthy growth of crops.
6. Food and beverage industry: In the beverage, wine, food processing, and other industries with high water quality requirements, manganese sand filters are used to remove iron and manganese impurities in the water source to ensure the quality of the final product.
7. Hot springs and SPA water treatment: used for water treatment of leisure and entertainment places such as hot springs and spas, keep the water quality clean, and remove iron and manganese impurities that affect the perception and experience.
8. Wastewater treatment: In some industrial wastewater treatment and urban sewage treatment, manganese sand filters, as a pre-treatment or intermediate treatment step, can remove some heavy metals and reduce the subsequent treatment load.
Because of its unique ability to remove iron and manganese, manganese sand filters have become an important tool to ensure the safety of water quality improve the efficiency of water treatment, and play an irreplaceable role in many industries.

The working principle of the manganese sand filter combines the two processes of physical filtration and chemical oxidation, mainly for the treatment of water bodies containing iron, manganese, and other heavy metal ions, to achieve the purpose of purifying water quality. The specific working principle is as follows:
1. Physical filtration: The manganese sand filter is filled with specially treated manganese sand filter material, which has a certain pore structure, which can intercept the suspended matter in the water, sand, and other large particle impurities, and play a preliminary physical filtration role.
2. Chemical oxidation: The principal ingredient in manganese sand, manganese dioxide (MnO2), has a natural oxidation property that catalyzes the oxidation of iron (Fe² +) and Mn² + ions in water, transforming them into compounds of the water-insoluble iron (Fe³ +) and Mn⁴ +. This process is manifested as follows:
• Oxidation reaction of iron: 4Fe² + O₂ + 10H₂O → 4Fe(OH)₃ + 8H +
• Oxidation reaction of manganese: 2Mn² + O₂ + 4H₂O → 2MnO₂ + 8H +
3. Adsorption and precipitation: Oxidized iron and manganese ions form insoluble precipitates (such as Fe(OH)₃ and MnO₂), which are caught by the physical retention and adsorption of the filter material surface when the water flows through the manganese sand filter, and thus removed from the water.
4. Biocatalysis: In some cases, a layer of biofilm may be formed in the manganese sand filter, in which microorganisms (such as iron bacteria) can accelerate the oxidation process of iron and manganese ions, further improving the treatment efficiency.
5. Backwashing and regeneration: With the filtration process, impurities will gradually accumulate on the surface of the manganese sand filter layer, requiring regular backwashing operations. When backwashing, the water flow direction is reversed to remove the accumulated impurities between the filter material and restore the filtration capacity of the filter material. For manganese sand, it has a certain self-regeneration ability, because the MnO2 on its surface will be constantly renewed during the oxidation process to maintain its activity.