Systems, apparatuses, and methods for pasteurization tunnel miniaturization

A small scale pasteurization tunnel system for microbial pasteurization of growth substrate, comprising:

• an insulated container and an insulated lid, wherein when the insulated lid is positioned to close the insulated container, an airtight inner chamber is formed by the insulated container and the insulated lid, wherein growth substrate is placed within the inner chamber for pasteurization;
• an air circulation subsystem comprising:
• an air circulation loop comprising airtight ducting which directs airflow through the substrate, wherein air flows out of a first end of the air circulation loop into the substrate and air flows out of the substrate and into a second end of the air circulation loop;
• a circulation fan which controls the speed and direction of airflow through the air circulation loop;
• a fresh air inlet which connects to the air circulation loop to provide fresh air;
• a return air damper which controls a resistance of return air entering into the air circulation loop at the second open end;
• a fresh air damper which controls a resistance of fresh air entering into the air circulation loop;
• an exhaust port to allow air to pass from the inner chamber to an exterior of the insulated container;
• and
• a control subsystem for monitoring data from a plurality of sensors and controlling the circulation fan, the return air damper, and the fresh air damper.