Water Treatment for Bottled Water Production












Market reports predict that over the next four years sales of bottled water will grow most quickly in Asia, Latin America, and Africa. The demand for drinkable water is increasing every year due to world population growth, especially in developing countries.

ROTEK has been supplying water treatment systems for bottled water production for the last 2 decades. Unlike other competitors who supply water treatment equipment, filling, and packaging machinery as one solution, ROTEK is only focusing on water treatment technology which enables us to provide more reliable and high-quality water through our water treatment systems.

ROTEK uses a variety of water purification technologies including:

  • Reverse osmosis, Ultra-filtration and Nano-filtration plants

  • Media filtration, water softening and chemical dosing systems

  • Electro-deionization as stand-alone or combined with RO.

  • Resin based ion exchange systems

  • UV and corona discharge Ozone sanitation systems


Water quality is always the main concern for bottled water production. In order to find out if the raw water has met the standard of drinking water, Raw Water Quality Analysis must be completed and send it to us for further system design recommendations.

The drinking of distilled water has been both advocated and discouraged for health reasons. The lack of naturally occurring minerals in distilled water has raised some concerns. The Journal of General Internal Medicine[16] published a study on the mineral contents of different waters available in the US. The study concluded:

Drinking water sources available to North Americans may contain high levels of Ca2+, Mg2+, and Na+ and may provide clinically important portions of the recommended dietary intake of these minerals. Physicians should encourage patients to check the mineral content of their drinking water, whether tap or bottled and choose water most appropriate for their needs.

Design Criteria

Based on the raw water quality analysis, we will provide our design suggestions follow by the 4 major treatment setup:

Filtration Systems
This section is basically responsible to filter out most of the fine particles, heavy metals, chlorine, organic matters, bacteria, color & odors. The filtration system usually consists of Clino-X Multimedia Sand Filter, Activated Carbon Filter, Water Softener, Ultra-Filtration System, Anti-Scale, and Chlorination Chemical Dosing Systems.

Purification Systems
Reverse osmosis (RO) is a water purification technology that ROTEK uses most of the time for many industries. RO can remove many types of molecules and ions from solutions and is used in both industrial processes and to produce potable water. Depending on the raw water quality, if raw water TDS is below 50ppm, then this section of the purification system may not be required as part of the design for bottled water production.


Remineralization Systems

Although RO removes everything from the water (including good and bad minerals),
however low mineralized water have few adverse effects:
- High corrosion potential
- Dietary deficiency causing risks of ischaemic heart and cerebrovascular disease (WHO, 2005a; WHO, 2006; Cotruvo, 2006)
The WHO recommends 10 mg/L of Magnesium and 30 mg/L of Calcium for drinking water. Therefore adding beneficial minerals to the product water is a process called demineralization. ROTEK uses natural minerals called "Camag" for adding pure Magnesium and Calcium to the product water with great improvement on the taste and pH level.

Disinfection Systems
The most common bacteria found in bottled water is Pseudomonas fluorescens, which is common in fresh-water springs. It is not considered to be a health threat until you leave the bottle open for extended periods of time and the bacteria begin to react with the carcinogens in the plastic. Reducing bacteria and microbial to the minimum is the most important issue in the bottled water production business. ROTEK disinfection system consists of UV sterilizer, Nanosilver Activated Carbon, 0.2-micron filter, and ozone disinfection. With four levels of protections, the ROTEK disinfection system will make sure the bacteria level is reduced to nil before filled to the bottle.

© 2019 by E-ROTEK WATER SYSTEMS CO., LTD.  |  Pingtung County, Taiwan  |  jeff@rotekwater.com  |  (886) 2 2218 6425



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