Which one is better? Ultrafiltration, reverse osmosis or nanofiltration

When it comes to water bottling plant, there is a series of processes and machines that are involved. The process starts with purification where raw water is treated to make it drinkable. Then there is ozone generator that sterilizes water to kill the bacteria and other micro-organisms that are harmful to a persons’ health. Finally, the water filling machine packages the mineral or pure water depending on your choice of purification. This article enables you to go through different types of water purification that allows you to make an ideal choice when embarking on the same process.

Ultrafiltration system

Under ultrafiltration, the accuracy of filtration is usually 0.001 to 0.1 microns. This makes it one of the new and accurate technologies of the 21st century. It has membrane separation technology that allows filtration using pressure difference. In this case, suspended solids, iron rust, colloid, sediment, bacteria, and other harmful particles are filtered out. However, vital elements that are important in the human body are usually left out of this process. This also makes ultrafiltration a perfect way of manufacturing mountain spring and mineral water. In ultrafiltration, the recovery rate is normally high at about 95%.


In the nano-filtration process, the accuracy of filtration is normally between the reverse osmosis and ultrafiltration. Compared to reverse osmosis, the desalinization is relatively lower. There is also membrane separation technology in nanofiltration that is usually pressurized and charged. The recovery rate in this process is also low compared to other purification processes. This implies that most of the water, about 35%, is wasted during this process. Nanofiltration is only recommended for generating pure water for industries.

Reverse Osmosis

In the RO process, the accuracy rate is about 0.0001. This is because it uses an ultra-high precision membrane and uses differential pressure technology. In this case, almost all impurities are filtered out including the beneficial minerals present in water. The reverse osmosis membrane only allows water molecules to pass through and nearly 50% of the tap water goes to waste.  This process is ideal for making ultra-pure water for industrial and pharmaceutical usage. In reverse osmosis, electricity and power are needed. The utilization ratio is low and the flow rate, this makes it not ideal for purification of a large amount of drinking water.

Depending on whether you need mineral, pure or spring water, you should choose the processes that best suit you. Also, remember to get the water filling machine that is in line with the water that is a generation from the purification system.


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