Tomato paste is one of the most widely used food ingredients in the world, and its production requires strict control of raw material quality, processing temperature, concentration level, and sterilization conditions. In modern factories, the tomato paste manufacturing process is highly automated and designed to ensure high yield, stable Brix, natural color, and long shelf life.
This article explains the complete industrial tomato paste production process, equipment configuration, and key technical points used in modern tomato processing plants.
1. Overview of Tomato Paste Manufacturing
In industrial production, tomato paste is produced through a continuous processing line that includes washing, crushing, enzyme inactivation, pulping, concentration, sterilization, and aseptic filling.
Typical process flow:
Fresh tomatoes
→ Washing
→ Sorting
→ Crushing
→ Hot Break / Cold Break
→ Pulping & Refining
→ Vacuum Concentration
→ Sterilization
→ Aseptic Filling
Different product requirements such as 28–30%, 30–32%, or 36–38% Brix will affect equipment selection and process parameters.
2. Raw Tomato Selection
High-quality tomato paste starts with proper raw material selection.
Industrial processing tomatoes should have:
- High maturity
- Bright red color
- High solid content
- Balanced sugar-acid ratio
- Low rot and damage rate
Tomato varieties with higher natural solids reduce energy consumption during concentration.
Poor raw materials will cause:
- Low yield
- Dark color
- Thin texture
- High processing cost
Modern factories often install sorting systems before processing to remove unqualified tomatoes.
3. Washing and Cleaning
After unloading, tomatoes enter the washing system to remove soil, leaves, sand, and pesticide residues.
Common equipment includes:
- Bubble washing machine
- Spray washing machine
- Roller inspection conveyor
Key technical points:
- Use circulating clean water
- Avoid excessive mechanical pressure
- Prevent early fruit damage
Good washing improves hygiene and reduces microbial load before crushing.
4. Crushing and Preheating (Hot Break / Cold Break)
After washing, tomatoes are crushed into pulp and immediately heated to control enzyme activity.
Two main processing methods are used in the tomato paste manufacturing process.
Hot Break Process
Temperature: 85–95°C
Advantages:
- High viscosity
- Thick texture
- Bright color
- Suitable for ketchup and paste
Cold Break Process
Temperature: 65–75°C
Advantages:
- Fresh flavor
- Lower viscosity
- Suitable for sauce products
The purpose of heating is to inactivate pectinase and polyphenol oxidase, which can cause:
- Color darkening
- Texture thinning
- Quality instability
Temperature control is one of the most critical steps in tomato processing.
5. Pulping and Refining
After heating, the tomato pulp is sent to pulping machines to separate:
- Skin
- Seeds
- Fibers
Industrial tomato lines usually use multi-stage pulping:
- First stage: coarse separation
- Second stage: fine refining
Benefits:
- Higher pulp recovery
- Smooth texture
- Better concentration efficiency
Mesh size is selected based on product standard.
6. Blending and Standardization
Before concentration, the tomato pulp may be adjusted to meet product specifications.
Possible adjustments:
- Salt addition
- Sugar addition
- Acidity adjustment
- Mixing different batches
Blending ensures consistent taste, color, and viscosity for large-scale production.
7. Vacuum Concentration
The most important step in the tomato paste manufacturing process is concentration.
Water is removed using vacuum evaporators.
Modern plants use:
- Double-effect evaporator
- Triple-effect evaporator
- Falling film evaporator
Advantages of vacuum concentration:
- Low temperature evaporation
- Protects natural color
- Preserves nutrients
- Saves steam energy
Common Brix levels:
- 28–30%
- 30–32%
- 36–38%
Higher Brix requires more evaporation and higher energy consumption.
8. Sterilization
After concentration, tomato paste must be sterilized to ensure food safety.
Common sterilization methods:
- Tubular sterilizer
- UHT sterilizer
Key control points:
- Temperature
- Holding time
- Flow stability
Proper sterilization ensures:
- Long shelf life
- No microbial growth
- Stable export quality
9. Aseptic Filling
Industrial tomato paste is usually packed using aseptic filling systems.
Common packaging:
- Aseptic bag in drum
- Bag in box
- Tin can
- Glass jar
Aseptic filling advantages:
- No preservatives required
- Long storage time
- Suitable for export
The filling system must work in a sterile environment to prevent contamination.
10. Key Equipment in Tomato Paste Production Line
A complete tomato paste processing line usually includes:
- Washing machine
- Sorting conveyor
- Crusher
- Hot break system
- Pulping machine
- Vacuum evaporator
- Sterilizer
- Aseptic filling machine
- CIP cleaning system
Modern factories use PLC automatic control to ensure stable production.
11. How Modern Tomato Processing Plants Improve Efficiency
Advanced tomato processing plants focus on:
- Energy saving evaporation
- Automatic temperature control
- High pulp recovery
- Low steam consumption
- Hygienic design
- Continuous production
A well-designed processing line can significantly reduce operating cost while improving product quality.