What is the filtration challenge in bottled water producing?

Talk to us

Driven by consumer demand for convenient, high-quality drinking water, the bottled water industry has surged. To stay competitive, stringent water quality standards must be maintained.

Integrating filtration systems is crucial to meet these standards, minimizing particulates, eliminating microorganisms, and safeguarding equipment.

Through an in-depth look at bottled water filtration, we will show readers how to properly select a filtration element.

By reading this article, you will gain a more comprehensive understanding of filtration technology in the bottled water industry and gain practical knowledge to address different challenges.

Challenges in Bottled Water Filtration

Challenges in Bottled Water Filtration

Bottled water sources face contamination risks from various origins, including industrial, agricultural, and municipal discharges. This leads to the presence of diverse organic and inorganic contaminants, alongside chemicals like pesticides, industrial wastes, and pharmaceutical residues. These contaminants pose potential health hazards, highlighting the challenges encountered in filtering bottled water.

Heavy metal pollution

Heavy metals such as fluoride, radioactive particles, arsenic, hexavalent chromium, lead, and mercury are common contaminants in water and are potentially harmful to human health. Filtration systems need to effectively remove these heavy metals to ensure safe water quality.

Disinfection By-products and Chemicals

Chlorine, chloramines, and disinfection by-products (DBPs) are common water treatment additives, but their overuse can generate harmful by-products. To provide clean drinking water, filtration systems must effectively eliminate these chemicals.

Drugs and Pharmaceutical Byproducts

Pharmaceutical residues and by-products can infiltrate the water supply, becoming contaminants. The filtration system must possess the capability to remove these substances, ensuring water quality adheres to sanitary standards.

Nitrates and Nitrites

Nitrates and nitrites, stemming from agricultural and industrial activities, are major water contaminants. Effective filtration systems are essential to reduce the concentration of these compounds and maintain safe water quality.

Industrial Chemicals and Solvents

Industrial chemicals and solvents, such as TCE, MTBE, VOCs, etc., may enter water through discharges or pollution sources. Proper filtration treatment is crucial to prevent these chemicals from posing health hazards.

Herbicides and Pesticides

Herbicides and pesticides used in agriculture can seep into water supplies, becoming pollutants. Filtration systems need the capability to remove these pesticide residues.

Bacteria, Encystment, Viruses

Water may harbor various microorganisms, including bacteria, encysted forms, and viruses. Filtration systems must employ suitable technology to effectively remove these microorganisms and ensure water purity.

Understanding the Types of Bottled Water

Understanding the Types of Bottled Water

To meet the rising demand in the bottled water market, filtration systems must not only effectively eliminate contaminants but also maintain efficiency through advanced technologies.

Various types of bottled water necessitate distinct filtration processes and precision requirements. Before selecting an appropriate filtration method, it is essential to understand the diverse categories of bottled water.

Spring Water

Characteristics: Spring water, sourced from natural springs, is favored for its clear and natural qualities.
Filtration Requirements: The filtration process focuses on removing microorganisms, sediment, and other natural impurities to maintain water purity.

Mineral Water

Characteristics: Rich in naturally occurring minerals, mineral water has a specific composition, often derived from springs, containing dissolved solids like calcium, magnesium, sodium, potassium, silica, and bicarbonate.
Filtration Requirements: The process targets microorganisms and sediments while ensuring retention of natural minerals to preserve the original characteristics.

Drinking Water

Characteristics: Obtained through artificial treatment, pure drinking water is typically derived by purifying tap water through a series of processes.
Filtration Requirements: Complete removal of impurities, chlorine, bacteria, etc., is necessary to provide colorless, odorless, pure water.

Salz Water

Characteristics: Salz water, from a unique mineral spring, is rich in minerals, notably recognized for its high sodium chloride content.
Filtration Requirements: The process must remove microorganisms and sediments while preserving the distinctive minerals in the water.

When choosing a filtration process, producers must tailor filters and treatments for the specific bottled water type to meet desired quality standards. This personalized approach ensures diverse consumer needs are met across all bottled water varieties.

Bottled water filtration process

Bottled water filtration process

From groundwater to safe and pure water for drinking there are many important filtration steps in the middle, we often ignore the role of protection or packaging role of the filtration process, and ultimately can not get pure bottled water, let us understand the specific bottled water filtration steps.

Protecting a reverse osmosis or ion exchange unit (IEU)

This is one of the key steps in the bottled water filtration process. Before treating surface or groundwater, the water is treated and softened using a filter to protect the reverse osmosis or ion exchange unit. This helps remove impurities and hardness from the water and ensures that subsequent treatment steps operate efficiently.


Before the water enters the deionization system and the bottling line, it is passed through a pre-filter to remove fine particles and suspended organics. This helps to reduce the burden on the subsequent treatment equipment and ensures the cleanliness of the water.

Final Filtration

As the last line of defense before bottling, final filtration aims to reduce biological contaminants. This includes the removal of microorganisms such as bacteria, capsules and viruses to ensure that the final product meets hygiene standards.

Tank Vent Filtration

During the bottling process, the exhaust ports of the gas storage tanks need to be filtered. This ensures that sterile air can pass through during filling and venting while protecting the tank and its contents from contamination.

Filtration at the bottling and packaging stage

Filters play an important role in the bottling and packaging stages in the presence of CO2 or N2. They effectively remove airborne contaminants and ensure that the final packaged bottled water remains pure at the factory.

By carefully designing and implementing these steps, manufacturers can ensure that they provide a high-quality, safe and pure bottled water product that meets consumer demand for healthy drinking water.

How to choose the right bottled water filter

How to choose the right bottled water filter

After understanding the steps of filtration from surface water to bottled water, you may still have some questions about how to choose the right bottled water filter, the following content will tell you what kind of filtration elements you should pick at different stages to ensure filtration efficiency.

Protects Reverse Osmosis Or Ion Exchange Units (IEU)

Pleated cartridge filters made of PP or fiberglass are recommended. PP pleated cartridge filters are known for their chemical resistance, low cost and uniform microporous distribution, making them an economical pre-filter choice for removing particulate matter.

Fiberglass pleated cartridge filters are suitable for handling chemically complex liquids. The filtration accuracy is progressively filtered from greater than 10 microns down to 1 or 5 microns to protect reverse osmosis and ion exchange units.


A 5-micron pp or glass fiber filter cartridge is installed between the ion exchange unit and the water storage tank to prevent the entry of broken beads.

Final Filtration

Control bioburden class hydrophilic polyethersulfone membrane pleated cartridge can not only filter out microorganisms in water, such as bacteria, encapsulation and virus, etc., but the price is more economical if the budget is sufficient to pursue a higher filtration effect, you can choose the sterilization model of PES membrane pleated cartridge. The filtration precision can be chosen from 1~10μm as the final filtration before bottling.

Gas Storage Tank Exhaust Port Filtration

Usually, the filtration precision is 0.2μm, and the cartridge should be hydrophobic and bacteriostatic to prevent moisture and microorganisms from entering the gas storage tank. Hydrophobic PTFE membrane pleated cartridge filters are recommended.

Bottling And Packaging Stage Filtration

As above, hydrophobic PTFE membrane pleated cartridge filters are recommended, with a filtration accuracy of 0.2 microns, hydrophobic and bacteriostatic properties to prevent moisture and microbial contamination of the finished product.

Sanitek offers suitable filters to ensure that bottled water is effectively filtered at each stage of production.


After reading this article, I believe you must have an in-depth knowledge of bottled water filtration.

Before we choose a bottled water filter, we have to select it according to the type of bottled water and the difference in filtration steps, and we need to check both the filtration material and the filtration precision extra carefully.

Sanitek not only provides bottled water filtration elements and filters but also can provide you with the best filtration solutions to help you efficiently filter and obtain pure water quality in bottled water production. Contact us today to learn about the best-bottled water filtration solution for you.

All Categories

Wanting more information about Sanitek? Contact us now!

Contact Us

Let’s help you find solution suites your needs.

Explore more how we can solve your toughest problems in critical filtration.

Consult with an Expert

error: Content is protected !!