Khoa is a traditional Indian dairy product used as a base for many sweets. For food consultants, food processing consultants, and dairy industry professionals, understanding the various methods of khoa production is crucial for setting up efficient, compliant, and high-quality production lines.
Overview of Khoa Manufacturing Methods
There are four major methods for khoa production:
- Traditional method
- Improved batch method
- Mechanized method
- Membrane technology (emerging)
Each method varies based on scale, efficiency, equipment, and output quality—making method selection essential for food manufacturing consultants and dairy processing plant design experts.
Traditional Method of Khoa Making
This labor-intensive method is still prevalent in small-scale dairy units.
- Buffalo milk is preferred for higher yield, soft body, and sweet taste.
- Cow milk results in slightly pasty khoa due to higher chloride levels.
- Approx. 4 L buffalo milk or 5 L cow milk = 1 kg khoa.
Procedure:
- Milk is boiled in a heavy iron pan (karahi).
- Stirring with an iron scraper (khunti) prevents burning.
- As water evaporates, the thickened mass is cooled and molded.
🚫 Limitations:
- Labor- and time-intensive
- Inconsistent quality
- Smoky flavor
- Not suitable for large-scale food processing factories
Types of Khoa Produced
Dhap Khoa
- Stopped at rabri stage
- Soft grains and high moisture
- Used in kalakand, milk cake
Pindi Khoa
- Extended heating post-rabri
- Smooth, molded texture
- Common in barfis
Danedar Khoa
- Grainy texture from slightly soured milk
- Achieved by adding citric acid or sour whey
- Used in pedas
Improved Batch Method (For Small Food Businesses)
A more controlled approach ideal for medium-scale dairy plants.
- Uses steam-heated stainless steel kettles
- Enhances hygiene and avoids smoky flavor
- Maintains product uniformity
Technical Specs:
- Cow milk: 4.5% fat
- Buffalo milk: 5.5% fat
- Batch time: ~15–20 minutes
Mechanized Processes for Khoa Production
A must for food technology consulting and food industry consultants involved in scaling operations.
3.1 Continuous Khoa-Making Machine
- Steam-jacketed cylinder + cascading pans
- Total solids raised from 30% to 70% in ~25 minutes
3.2 Roller Dryer Method
- Uses vacuum-concentrated milk
- Steam: 25–30 psi
- Challenge: Inconsistent texture
3.3 Scraped Surface Conical Vat
- Capacity: 40–80 kg milk per batch
- Time: 14–50 min
- Challenge: High initial loss
3.4 Contherm–Convap System (Alfa Laval)
- Efficient milk concentration unit
- Steam pressures: 3–4 kg/cm²
- Throughput: 300–350 kg/hour
- Limitation: Lack of traditional flavor and texture
3.5 Thin Film Scraped Surface Heat Exchanger (TSSHE)
- Divided steam jacket for gradual heating
- Handles up to 50 kg/hour
- Ensures grainy khoa texture, scalable process
3.6 Inclined Scraped Surface Heat Exchanger (ISSHE)
- Rotor speed: 40–80 rpm
- Steam pressure: 1.0–1.5 kg/cm²
- Suitable for continuous khoa production
✅ Advantages:
- Uniform quality
- Flexible operations
- Minimal product loss
- Easy automation
- Hygienic enclosed system
Chemical Quality of Khoa
For regulatory compliance and food consultancy services, maintaining the legal standards is critical:
- Cow milk khoa: Minimum 4.4% fat
- Buffalo milk khoa: Minimum 5.5% fat
Quality control should be a focus for food manufacturing consultants and auditing teams to ensure FSSAI compliance.
Constituents (%
Market
Food Consulting Insights
- Food processing consultants can help design and implement continuous systems that optimize yield and quality.
- Food business consultants must advise on compliance with regulatory norms and shelf-life standards.
- Engineering consultants should design plant layouts incorporating mechanized khoa systems.
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