The yeast expansion system is a critical component in modern brewery operations, designed to cultivate yeast in a highly controlled, aseptic environment. Using advanced biological engineering concepts, this equipment ensures pure breed cultivation with no dead spaces in the tank, allowing for efficient and reliable cleaning and sterilization through CIP (Cleaning-In-Place) processes. With a focus on sterilization performance, the system guarantees that the entire process, from wort preparation to yeast cultivation, remains contamination-free.
Key Features of the Yeast Expansion System
Sterilization and Aseptic Environment:
The system’s design prioritizes aseptic conditions. The tanks are designed with no dead spaces and a smooth surface finish, making them easy to clean. The equipment undergoes thorough CIP cleaning to ensure both the cleaning and sterilization of the entire system.
Controlled Process for Optimal Cultivation:
A well-regulated process flow ensures the purity of the yeast culture. From the initial CIP cleaning to sterilization, cooling, and cultivation, the system maintains positive pressure (0.5 bar) of aseptic air inside the tank, ensuring the wort remains uncontaminated.
Efficient Heat Exchange and Cooling:
The system uses innovative heat and cooling structures. Cooling is achieved through a shell Miller board interlayer with alcohol water for indirect cooling, while heating is provided by steam through a cone-bottom Miller board interlayer, offering efficient temperature control.
Seamless Pipeline Design:
The smooth, closed-path pipeline system eliminates dead spaces and ensures the absence of steam leakage. This design not only maintains a hygienic working environment but also guarantees efficient cleaning, adhering to high sanitation standards.
From Laboratory to Cultivation，the system follows a stringent process flow to ensure optimal yeast propagation:
Initial Laboratory Cultivation:
The wort undergoes initial levels of cultivation in a laboratory environment before being transferred to a Carlsberg flask for further processing.
CIP Cleaning and Steam Sterilization:
Prior to yeast propagation, the system’s containers and pipelines undergo thorough CIP cleaning and steam sterilization to eliminate contaminants.
Wort Sterilization and Cooling:
The hot or cold wort is introduced into the seeding tank, where it undergoes a second sterilization before being cooled to the inoculation temperature. Afterward, yeast from the Carlsberg flask is inoculated, and interval ventilation cultivation is carried out for 36-48 hours.
Expanded Cultivation:
After the yeast has been sufficiently cultivated, it is transferred into the expanded cultivating tank. The process is repeated for further propagation, with yeast transferred into storage tanks or fermentation tanks as needed.
In summary, this yeast expansion system delivers a highly reliable, clean, and efficient method for pure breed yeast cultivation. By maintaining stringent sterility standards and offering flexible control options, it ensures that breweries can cultivate yeast with precision, enhancing the overall production process.
