Customized double-pass RO solution for high-capacity purified drinking water production

Stable purified water quality is the foundation of barreled and bottled drinking water production. Production lines require reliable water with controlled dissolved solids, reduced odor, lower particle load, and hygienic handling before filling. If feed water quality is not treated properly, it can affect taste, clarity, production stability, and final product consistency.

To support large-scale filling operations, a barreled and bottled drinking water manufacturer in China selected Zhongnuo Water Treatment to design and manufacture a 20 m3/h purified water system. The customized solution treats municipal tap water through pretreatment, double-pass RO, UV sterilization, storage, and distribution to production line filling points.

The client required a high-capacity purified water system that could provide stable water quality and continuous supply for bottled and barreled water filling lines.

◎  Large production volume required stable output

The filling line required a continuous 20 m3/h treated water supply. Any production interruption could affect filling schedules, packaging efficiency, and daily output.

◎  Municipal tap water still required multi-stage treatment

Although municipal tap water was available, suspended solids, residual chlorine, odor, organics, and dissolved salts still needed to be reduced before the water could enter the filling process.

◎  Product water quality had to remain consistent

Bottled and barreled water production depends on stable taste, clarity, and quality. The system needed reliable purification performance across long operating cycles.

◎  Final storage and supply needed hygienic protection

After RO treatment, water still needed UV sterilization, clean storage, and stable distribution to filling points to support hygienic production.

Municipal Tap Water  ->  Raw Water Tank  ->  Raw Water Pump  ->  Multi-media Filter  ->  Activated Carbon Filter  ->  Security Filter  ->  First-stage High Pressure Pump  ->  First-stage RO System  ->  First-stage Purified Water Tank  ->  Second-stage High Pressure Pump  ->  Second-stage RO System  ->  Second-stage Pure Water Tank  ->  UV Sterilization  ->  Purified Water Tank  ->  Water Supply System  ->  Production Line Filling Points

This 20 m3/h purified water equipment was designed for barreled and bottled drinking water production lines. It combines pretreatment, double-pass reverse osmosis, UV sterilization, purified water storage, and distribution into a complete high-capacity process water solution.

Pretreatment for stable RO operation

The process begins with the Raw Water Tank and Raw Water Pump. The Multi-media Filter reduces suspended solids, while the Activated Carbon Filter helps remove residual chlorine, odor, and certain organic compounds. The Security Filter then captures fine particles before the first-stage RO system.

Double-pass RO for purified drinking water quality

The First-stage RO System removes most dissolved salts and impurities from the feed water. Water is then stored in the First-stage Purified Water Tank and sent through the Second-stage RO System for deeper purification, helping produce stable water quality for filling applications.

UV sterilization and filling line supply

After second-stage RO treatment, UV Sterilization provides an additional hygienic safeguard before water enters the Purified Water Tank. The Water Supply System then delivers treated water to production line filling points for barreled and bottled water production.

After installation and commissioning, the purified water equipment successfully met the client's production line water requirements and provided reliable support for high-capacity filling operations.

· Stable purified water output of 20 m3/h for production line filling use.

· Improved control of dissolved solids, residual chlorine, odor, and particle load.

· More consistent water quality for barreled and bottled drinking water production.

· Reliable supply support for continuous filling line operation.

· Additional hygienic protection through UV sterilization before final storage.

· High-capacity double-pass RO configuration suitable for large-scale drinking water plants.

Zhongnuo Water Treatment provides customized purified water, RO, ultrapure water, and sterilization solutions for drinking water, food, beverage, pharmaceutical, industrial, and manufacturing customers. Each system is designed around feed water quality, target water use, production capacity, and site layout.

· Customized double-pass RO purified water system design for bottled and barreled water production.

· Integrated process planning from pretreatment through RO, UV, storage, and distribution.

· High-capacity equipment configuration for continuous filling line operation.

· One-stop support covering design, manufacturing, commissioning, and technical service.

1. Why does bottled water production use RO purification?

RO helps reduce dissolved salts, impurities, odor-related compounds, and other contaminants, supporting cleaner and more consistent product water quality.

2. Why use two-stage RO in this project?

Two-stage RO provides deeper purification than a single RO stage, helping improve water quality consistency for drinking water filling applications.

3. What is the role of UV sterilization?

UV sterilization provides an additional hygienic safeguard before water enters final storage and distribution to filling points.

4. Can this system be customized for different bottle or barrel lines?

Yes. Zhongnuo Water Treatment can customize system capacity, pretreatment configuration, RO staging, storage volume, and supply pressure according to the production line requirements.