The processing of yogurt is a complex and delicate process. The process involves multiple steps to ensure the quality and taste of the final product. In general, yogurt processing can be summarized into the following key steps.
Commercial Yogurt Making Process
1. Raw material preparation
- Base selection: Usually, we use fresh milk as the base. The milk undergoes rigorous screening and testing to ensure it meets production requirements.
- Adding ingredients: Following the product formula, we add sugar, stabilizer, starter (lactic acid bacteria), and other auxiliary materials to the milk. Crucially, precisely controlling these amounts ensures the taste and quality of the end product.
2.Pretreatment
- Filtering: Strain the milk to remove hair and impurities, to ensure the purity of the product.
- Mixing: Combine the milk and ingredients for even distribution. This system may include milk storage tanks, preheating tanks, filters, and other equipment.
- Preheating: Raise the mixed milk to a precise temperature to ensure microbial safety and optimal fermentation conditions.
- Homogenizing: Homogenize the milk and ingredients mixture to ensure uniform distribution of fat globules and other components throughout the liquid. This step improves the texture and consistency of the final product.
3. Sterilization
- Pasteurization: Heat milk to 85°C for 30 minutes (LTST method) or 138°C for 2 seconds (UHT method) to kill harmful microorganisms such as pathogens, yeasts, and molds, ensuring product safety and stability.
4. Fermentation
- Inoculation: Inoculate the pasteurized milk with a lactic acid bacteria starter. These bacteria rapidly multiply and produce lactic acid at the optimal temperature (about 42℃), reducing the pH of the milk and creating the unique flavor and texture of yogurt.
- Fermentation control: During the fermentation process, it is necessary to control both temperature and time to ensure the proliferation of lactic acid bacteria and the production of lactic acid to the desired level.
5. Cooling & Post-treatment
- Cooling: Once fermentation reaches pH 4.5, transfer the yogurt to a cooling tank and reduce the temperature to 4°C within 30 minutes. This rapid chilling stops fermentation and preserves the product’s texture.
- Stabilizing and filling: The cooled yogurt is stabilized to ensure consistent quality before being filled. Attention must be paid to sanitary conditions and filling speed to avoid product contamination or bubbles.
6. Quality Control & Inspection
Throughout the production process, strict quality control and testing of raw materials, semi-finished products, and finished products are conducted to ensure compliance with relevant standards and requirements.
7. Packaging & Storage
After filling, package the yogurt immediately to shield it from external contamination and deterioration. The chosen packaging materials must comply with food safety regulations while ensuring airtight sealing. Subsequently, the packaged yogurt requires low-temperature storage to preserve its freshness and flavor integrity.
Craftsmanship
Yogurt craftsmanship displays diverse techniques, yielding delightful varieties. From creamy traditional to smoothly stirred modern yogurt, each process varies. From starter cultures to temperature control, each step shapes flavor, texture, and nutrition. Naturally, these diverse processes create yogurts for every taste, fulfilling individual preferences.
Standard Production Line Introduction
This yoghurt production line contains the basic process of yoghurt production, equipped with a CIP cleaning system. It includes yoghurt homogenization, pasteurization, fermentation, and other processes. The unit equipment can be tailored to the specific process of the customer and easily assembled or embedded in their own production line. Learn more…
In Summary
The processing of yogurt is an intricate process encompassing multiple steps and elements. By implementing rigorous raw material screening, precise ingredient addition, effective sterilization, meticulous fermentation control, and stringent quality control and testing, we can guarantee the production of high-quality yogurt products with exceptional taste.
