Beverage bottling plants face a unique challenge: they must deliver safe, great-tasting products while managing high-volume water use, strict microbiological limits, and chemical-free sanitation expectations. This customer case study examines how a mid-size beverage bottling facility in Southeast Asia replaced chlorine-based disinfection with an integrated industrial ozone generator system, achieving improved product quality, reduced operating costs, and faster regulatory approval for export markets.

Project Background and Customer Requirements

The customer operates a multi-line bottling plant producing carbonated soft drinks, flavored water, and ready-to-drink beverages for domestic supermarkets and export buyers. Before the upgrade, the plant relied on sodium hypochlorite for raw water disinfection and periodic peracetic acid for clean-in-place (CIP) sanitation. Key operational pain points included:

• Chlorine residuals affecting product taste and odor in sensitive flavored waters
• High recurring chemical costs and complex storage and handling requirements
• Biofilm buildup in storage tanks and filling lines, causing unscheduled downtime
• Stringent export buyer audits requiring documented, chemical-reduction initiatives

The plant required a treatment solution capable of handling a peak process water flow of 45 m³/hour, with reliable disinfection across raw water, bottle rinse, and CIP loops.

System Design and Equipment Selection

After reviewing water quality data and production schedules, Tonglin Ozone engineers proposed an oxygen-fed ozone system built around a 300 g/h corona discharge ozone generator with integrated PSA oxygen concentrator, venturi injection, and catalytic off-gas destruction. The system architecture included four treatment points:

1. Raw Water Pre-Ozonation

Raw groundwater was treated at 0.8 mg/L ozone dose to oxidize iron, manganese, and organic color while achieving primary disinfection. This eliminated chlorine taste precursors before final filtration.

2. Process Water Disinfection

Filtered water received a controlled ozone residual of 0.3 – 0.5 mg/L at the entrance to the product water tank, maintaining a sterile distribution loop without persistent chemical residuals.

3. Bottle and Cap Rinse Sanitation

A separate 50 g/h ozone injection skid supplied ozonated rinse water at 0.4 mg/L to sanitize bottles and caps immediately before filling, replacing hot water rinse and chemical sanitizer.

4. CIP Loop Disinfection

A dedicated ozone water CIP circuit was installed for weekly sanitation of fillers, pipes, and storage tanks. Ozonated water at 2.0 mg/L circulated for 30 minutes, removing biofilm and eliminating the need for peracetic acid in routine sanitation.

Performance Results After Six Months

The plant was monitored for six months after commissioning. The following table summarizes key performance indicators compared with the previous chlorine-based operation:

Why Ozone Outperformed Chlorine in This Application

Several technical factors made ozone the superior choice for this bottling operation:

• No persistent chemical residual: Ozone decomposes to oxygen, preventing off-taste and off-odor in the final product.
• Biofilm removal: Unlike chlorine, which can allow biofilm to persist at low residuals, ozone disrupts extracellular polymeric substances and removes established biofilms.
• Single solution, multiple applications: One ozone system supplied product water, rinse water, and CIP sanitation, simplifying chemical inventory.
• Faster kill kinetics: Ozone achieves a 5-log reduction of common beverage spoilers such as Pseudomonas, Yeast, and Mold within seconds at proper CT values.

ROI and Lifecycle Cost Analysis

The total installed cost of the ozone system, including generator, oxygen concentrator, injectors, off-gas destructor, and monitoring instruments, was recovered through direct and indirect savings:

• Chemical savings: $18,000 USD per year from eliminated chlorine, peracetic acid, and auxiliary chemicals.
• Downtime reduction: Approximately $12,000 USD per year in avoided lost production and emergency maintenance.
• Rejected batch reduction: Estimated $8,000 – $10,000 USD per year in avoided product discard and rework.
• Power cost: Added approximately $4,500 USD per year for oxygen concentrator and generator operation.

The net annual savings of approximately $33,500 USD delivered a payback period of 22 months on the capital investment. Beyond direct savings, the customer gained a documented chemical-reduction program that supported premium product positioning and export market entry.

Implementation Lessons for Other Bottling Plants

This project highlights several best practices applicable to beverage, brewery, and food processing facilities considering ozone:

• Size for peak flow and worst-case temperature: Ozone solubility decreases as water temperature rises, so generators must be sized for summer peak conditions.
• Use oxygen feed for high-concentration ozone: Oxygen-fed generators produce ozone at 6 – 12 wt%, improving mass transfer and reducing contactor volume.
• Install residual monitoring and ORP control: Automated feedback prevents overdosing, protects equipment, and documents compliance.
• Do not ignore materials compatibility: 316L stainless steel, PTFE, and ceramic components resist ozone corrosion; natural rubber and some elastomers must be avoided.
• Plan off-gas destruction: Catalytic destructors safely convert residual ozone to oxygen before venting, meeting occupational safety limits.

Conclusion

This beverage bottling case study demonstrates that ozone is not merely an alternative disinfectant — it is a strategic upgrade that improves product quality, reduces operating complexity, and supports regulatory and commercial objectives. By replacing chlorine and peracetic acid with an integrated ozone system, the customer achieved measurable microbiological control, eliminated taste complaints, reduced downtime, and recovered the investment in under two years.

For bottling plants, breweries, and food processors evaluating water treatment and sanitation upgrades, ozone offers a proven path to cleaner products, lower lifecycle costs, and stronger export credentials.