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A CO₂ recovery system collects surplus CO₂ from production or fermentation, purifies it and reuses it in the carbonated beverage line. A well-designed system can recover up to about 95% of CO₂ at purity up to 99.9%, lowering purchased CO₂ cost, reducing emissions and keeping the carbonation level consistent.
Role of CO₂ in carbonated drinks
CO₂ is the main raw material of carbonated beverages. Dissolved at suitable pressure and temperature, it creates the refreshing fizz, limits microbial growth to extend shelf life, and stabilizes flavor and pH. Plants usually buy CO₂ from outside, but recovering and reusing surplus gas cuts cost and waste.
How the system works
- Collect CO₂ released by fermentation or other process steps.
- Primary filtering to remove impurities, moisture and oil.
- Compress the CO₂ and separate unwanted gases.
- Deep cooling to liquefy CO₂ and remove residual impurities.
- Store pure liquid CO₂ in insulated tanks.
- Return CO₂ to carbonation or filling systems.
Benefits
- Lower operating cost: less industrial CO₂ to buy and less loss during filling and gas mixing.
- Environmental protection: lower CO₂ emissions, supporting standards such as ISO 14001 and circular, energy-saving production.
- Product quality: properly treated recovered CO₂ is free of odor and impurities and gives consistent carbonation.
- Brand reputation: a greener production image and easier access to markets with strict standards.
Requirements
A suitable plant area for CO₂ storage and treatment, and pressure-rated equipment and materials that meet standards.
Read the full technical article in Vietnamese
Frequently asked questions
How much CO₂ can be recovered?
A well-designed system can recover up to about 95% of CO₂ with purity up to 99.9%.
Why recover CO₂?
It reduces the cost of buying CO₂, lowers emissions and keeps carbonation consistent.
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