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In water treatment, choosing the right filter material is essential because each water source will have different quality. Sometimes, water filtration materials are simple and cheap but bring surprising results, manganese sand is one of them. Read the article below for more information about this type of sand!
What is manganese sand?
Manganese sand is formed from natural sand, with the chemical composition of KMnO4 or Mn(OH)4. This is a light weight ore, covered with a brown outer layer to increase the contact and oxidation ability of the grain.
Besides, manganese sand for water filtration also includes other substances such as: Fe, MnO2, MnC2, SiO2, etc. Therefore, this material has the ability to remove manganese and other impurities when processing or filtering water. In particular, this type of sand can also remove chlorine in tap water.
Manganese sand is produced according to the following process: Mining Mn(OH)4 ore > Using permanent magnets to create manganese sand to filter raw water > Crushing this material > Classifying sand by size.
For ore mining, this sand is mined by two methods: open pit and underground mine. Depending on the geology and topography of the area, the mining unit will choose the appropriate method.
Outstanding characteristics of this type of manganese sand
No need to use accompanying equipment or chemicals.
There is no need to periodically regenerate sand with permanganate solution.
The operating mechanism is simple, the price is much lower than imported materials such as manganese greensand, birm, pyrolox granules,…
Can be inserted into existing filter tanks without changing the structure of the tank.
It is possible to combine many treatment steps such as: flocculation, catalysis, and sediment filtration in the same equipment.
The amount of filtered water is lower than other materials, no aeration is required.
Ensuring the safety of water quality after treatment.
The longevity of this type of sand is high thanks to its great abrasion resistance.
Uses of this type of manganese sand
Manganese sand has many uses in industrial and civil water treatment, especially in the upstream crude filtration system for treatment before water is passed through the RO fine filtration system. Some effects of manganese sand are listed below:
Used to filter well water, remove the fishy smell of water contaminated with iron, manganese, hydrogen, arsenic, sulfide.
For heavily polluted water sources, this material is used to remove some heavy metals such as copper, lead, zinc, arsenic, nickel, chromium,…
This type of sand is a catalyst in the process of iron reduction (Fe less than or equal to 35 mg/l) and radioactive substances.
This type of sand is used to reduce the content of some organic compounds in water.
This type of sand has the ability to raise and stabilize the pH of water between 6.5 and 8.
This type of sand can reduce the amount of oil and absorb about 90mg of oil/g of manganese sand particles.
This type of sand has the ability to eliminate radioactive substances.
Manganese sand has the ability to oxidize sulfide, minimizing the effect of this substance on the reduction of iron and manganese.
How to use this manganese sand in water treatment system
Manganese sand is often used in filter column systems or coarse filter tanks. The thickness of this type of sand must be at least 40cm or more for water treatment efficiency to be high.
If the water source has a low pH, you can use LS granules or chemicals to raise the pH of the water source before going through the catalytic material layer with manganese. Below the layer of manganese granules, you should add a layer of quartz sand to retain iron and manganese oxides, creating clarity for the water source.
The thickness of the manganese layer is adjusted according to the manganese and iron content in the water source but must not be less than 300mm.
When used in combination with other filter materials, you can wash the filter like a regular sand filter.
Before use, you should wash off the manganese sand.
Wash the manganese sand before use
Recommendations when using this material to filter water
If the pH of the water source is < 6, you should use pH raising beads (LS) or raise the pH with chemicals (optimal pH for iron reduction is 6.5) first. Input iron content should be less than or equal to 35 mg/l.
Filtration speed when using manganese sand: From 5 to 20m/hour. You can use it in open filter tanks or pressure filter tanks, filtering from top to bottom.
For this type of sand, you do not need to reconstitute (except for the de-fluorination process). The best time to use manganese sand is 2 to 3 years.
Depending on the level of pollution or iron content in the water, you can adjust the material thickness and filtration speed accordingly.
To effectively treat groundwater, you need to provide enough oxygen for iron oxidation by arranging aeration in front of the filter tank.
You should filter the same layer of quartz from 0.2 to 0.3m to create water clarity.
You should add a little chloride before the filter tank if the groundwater contains iron in organic complex form.
You should arrange the height of the manganese ore layer to be at least 0.8m in equipment that removes iron with high iron content above 5mg/l, and the filtration speed does not exceed 20m3/h. You should operate for 3 to 4 days for better treatment efficiency (create a catalytic film on the seed surface in the beginning).
Where to buy reputable and quality Vietnamese manganese sand for water filtration?
Currently, on the market there are many reputable suppliers of manganese sand at good prices. So where to buy reputable and quality manganese sand?
Song Phung Environmental Company is chosen by many customers and has good reviews for the quality of services and products. Established in 2012, the company specializes in importing and distributing genuine water and environmental equipment. In addition, Song Phung Environmental Company also provides comprehensive system solutions from design, supply, installation to operation and technology transfer. To date, the company has become a reputable brand in the market with more than 5,000 customers trusting cooperation and 4,000 projects implemented in many business fields.
Vietnamese manganese sand is used to filter water for drilled wells and deodorize when water is contaminated with manganese, iron, arsenic, and hydrogen sulfide. Polluted water in contact with the sand surface will create oxidation and precipitation to remove heavy metals, making the water cleaner and clearer. At the same time, it is also a catalyst in the process of reducing iron with concentrations less than 35 mg/l and radioactive substances. In addition, this type of sand also reduces nitrogen content (ammonium, nitrate, nitrite), some phosphates, and organic compounds (from 20 to 50%, depending on the filtration speed of 4 – 7m3/hour). Furthermore, this material also has the ability to absorb about 90mg of oil/seed to reduce the amount of oil in water, eliminate radioactive substances and fluorine in water.
To effectively remove impurities from water, you should combine gravel, quartz sand, activated carbon, etc. At the same time, you should wash manganese sand before use. In addition, you need to replace this type of sand within 2 to 3 years to increase water filtration efficiency.
Above is basic information about the characteristics, uses and how to use manganese sand effectively. If you want to buy quality Vietnamese manganese sand for water filtration at a good price, please contact Song Phung Environmental Company immediately for quick advice and support!
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