Water is an important factor in human life, however, not everywhere has a clean water source for use. Especially, in remote areas, alum water purifier is an extremely necessary device. In these places, the city water supply system is not accessible, so most people still have to use well water, rivers, streams, etc. for daily activities. This water source contains many harmful impurities, which need to be cleaned with an alum water purifier before being adjusted for use.
Features of alum water filtration system
The alum water filtration system includes a filter tank made of Composite plastic, Stainless steel or PVC plastic and a RO filter. Normally, the alum water filtration system needs 3 filter tanks (or columns):
- Filter tank number 1 consists of 3 layers in order: large quartz stone, small quartz stone, manganese sand, with the function of removing heavy metals in water.
- Filter tank number 2 consists of 5 layers in order: large quartz stone, activated carbon, small quartz stone, manganese sand, PH increasing membrane. This column has the function of removing remaining metals and increasing the PH in the water.
- Filter tank number 3 consists of 4 layers in order: large quartz stone, activated carbon, small quartz stone, cation exchange resin beads with the function of softening water and creating purity.
In addition, the alum water filter system also has an RO membrane with a super-small osmosis mesh, ensuring up to 95% of bacteria and dirt in the water are filtered. Each type of filter tank has its own characteristics as follows.
Composite filter tank
Composite water filter tanks are made from Composite materials, including the base component (Polymer resin) and the core (fiberglass, Basalt fiber, Borax fiber, metal fiber, etc.).

Composite plastic filter tanks are widely used in the industrial water filtration industry due to the following advantages:
- Withstand high pressure
- Easy to customize into many shapes and colors
- Available in a variety of sizes
- Rust resistant
- Heat resistant
- Relatively light weight
- Convenient to transport and install
- Cheap/ considerable prices
However, the Composite plastic alum water filter system also has some disadvantages such as not being able to withstand too high temperatures, needing to install an additional roof if placed outdoors, easily getting dirty, and losing color, causing loss of aesthetics.
Stainless steel filter tank
This is the type of water filter used by many households on a small scale. The stainless steel used to make alum water filters is 304 stainless steel, meeting the best quality standards for hardness and durability.
Several advantages of stainless steel alum filter tanks includes:
- Extreme durability
- Fancy, luxurious appearance, suitable for home installation
- Withstands high temperatures so can be comfortably installed outdoors
- Rust free
However, this filter tank has a relatively high price. Moreover, because it is made of alloy, the stainless steel filter tank is very heavy, difficult to transport and assemble.
PVC filter tank
PVC plastic filter tanks are the cheapest of all materials, however, they are not used much today because of their low durability and the bad smell of plastic.
Alum water is filtered through Composite, Stainless Steel, PVC filter tanks, which is called the rough filtration stage. This water is only used for bathing, washing, watering plants, but should not be drunk directly or cooked because it has not yet achieved high purity.
RO purifier
RO alum water purifier can produce pure water for direct drinking or cooking. The reason is that the RO filter membrane has a very small pore size, only 0.0001mm, so it can filter up to 95% of dirt, microorganisms, and heavy metals.
Household RO water purifiers are small in size, convenient to install in any location in the house. Due to the high quality of purified water and slow productivity, RO alum water purifiers are mainly used for cooking and drinking, not for production or daily life.

Operating process of family alum water filtration system
The family alum water filtration system operates quite simply. Normally, alum water from rivers and lakes will be filtered through 3 tanks as follows:
- Step 1: Filter tank number 1 will remove impurities, plankton, algae, and seaweed in the water. These impurities are relatively large in size so they can be seen with the naked eye. After step 1, the dirt in the water will be removed but the dissolved substances in the water will still remain.
- Step 2: The pump continues to push water through filter tank number 2. Here, the filter membrane will remove odors, heavy metals, organic and inorganic compounds dissolved in water.
- Step 3: Filter tank number 3 will completely remove metal ions in the water. The water is now clear and can be used for cooking, bathing, and shampooing.
To achieve high purity, water now needs to be filtered through a RO home water purifier. The RO reverse osmosis membrane will produce pure water, removing up to 95% of bacteria, ensuring health safety when used.
Why should you install a family alum water filtration system?
Alum contaminated water is not good for the health of users, some illustrations are as follows:
- Washing clothes with alum-contaminated water causes yellow stains.
- Bathing in alum-contaminated water causes skin inflammation, itching, acne, etc.
- Using alum-contaminated water for cooking for a long time will affect the intestines, kidneys, etc. and can cause cancer if not treated promptly.
- Alum accumulated in pipes for a long time will lead to damage to water supply equipment.
In addition, using alum-contaminated water also brings many other harmful effects. Therefore, each household should proactively equip an alum water filter to ensure family health.
Causes of iron contamination in water
Some of the main causes of iron contaminated water include:
- Soil characteristics: In the Mekong Delta region, acid sulfate soil accounts for more than 40% of the soil. This is due to alluvial sediments associated with changes in sea level over the ages. Therefore, the soil and water in this region have high acid sulfate content. However, this is considered fertile and rich in nutrients, helping to increase rice and fruit production for export.
- Water pollution: Some polluted areas will lead to unclean water sources. In areas where waste is not properly treated, harmful metal molecules, plastic particles, alum, etc. will seep into the soil and water and affect the groundwater.
Can water purifier filter alum?
As mentioned above, RO water purifier is a great device for filtering alum water. The water source after filtration will be removed up to 95% of bacteria. However, to avoid clogging the filter membrane, before being put into the RO purifier, the alum water needs to be roughly filtered.
Although in theory, water after passing through the RO membrane can be used immediately, customers should still boil it to completely remove bacteria.
>> See more: Heavy Metals In Water And The Risk Of Bioaccumulation
Through the above article, we hope that customers have understood the importance of water filtration and the structure and operating process of alum water purifiers. Please quickly contact us Công ty Môi trường Song Phụng to get advice and choose a suitable water filter for your family!
To learn more about other powerful and unique water filtration systems distributed by Song Phung, order online at the website https://thietbinganhnuoc.com/san-pham or contact our hotline 0913.90.72.74 – 0984.620.494 for detailed enquiring.
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