High temperature high pressure sterilization process for edible mushroom cultivation medium

Abstract

The invention relates to a high temperature and high pressure sterilizing process in edible mushroom cultivation which comprises, putting the plastic bottle (or bag) containing edible mushroom cultivating culture media onto a dolly, pushing into a sterilizing still, venting vapor for sterilization, wherein the sterilizing still is a pulsated vacuum heavy pressure sterilizing still, during sterilizing, first letting in vapor into the still for warming-up, lowering the pressure in the still to -0.05-0.06 MPa, and letting in vapor continuously, raising the temperature to 121 deg C., and thermal insulation for 80-90 minutes.

Description

1. Technical field: [0001] The invention relates to a high-temperature sterilization process, in particular discloses a high-temperature and high-pressure sterilization process for an edible fungus cultivation medium, which is suitable for the field of edible fungus production. 2. Background technology: [0002] The medium for the growth of edible fungi is raw materials such as wood chips, corncobs, cottonseed hulls, rice bran, and bran. After the above-mentioned raw materials are properly proportioned and mixed, water is added to an appropriate water content, and the cultivation medium for edible fungi is made. Since the medium raw materials contain various microorganisms, it is necessary to kill all microorganisms by high temperature and high pressure before inoculating edible fungus strains. At the same time, high temperature can soften the texture of the culture material, which is beneficial for the mycelium of edible fungi to decompose the matrix and absorb nutrients. ...

AI Technical Summary

Problems solved by technology

Due to the large number of plastic bags or bottles filled with medium in the sterilizer, the density is high, and the steam circulation is poor, it is difficult to exhaust the cold air, resulting in slow temperature rise and time-consuming sterilization. The entire sterilization time takes 5 to 6.5 hours. Incomplete air exhaust, uneven temperature and pressure distribution, and "cold clusters" and "dead spots" in some areas, resulting in incomplete sterilization of edible fungus cultivation genes and pollution. If the sterilization time is prolonged, the nutrients in the medium will be destroyed too much Too much and affect the output