Solid state fermentation tanks, as one of the commonly used fermentation tanks, have a wide range of applications.

Bailun Biological 5 liters, 10 liters, 200 litersSolid fermentation tank

Solid state fermentation tanks are widely used in fields such as feed fermentation, fertilizer fermentation, tea fermentation, probiotic fermentation, methanol fermentation, pharmaceuticals, enzyme preparations, biopesticides, alcohol fermentation, biogas fermentation, etc.

Solid state fermentation method refers to a fermentation process in which natural substrates are used as carbon sources and energy sources, or inert substrates are used as solid supports, and the system is anhydrous or close to anhydrous. There are mainly shallow plate fermentation and thick layer ventilated fermentation.

The operating principle of solid fermentation tank: Microorganisms grow on a moist and insoluble substrate for fermentation. During the solid fermentation process, there is no free water. With the addition of free water produced by microorganisms, the scale of solid fermentation extends to viscous fermentation and suspended fermentation of solid particles. It can be assumed that the growth environment between each cell may not be the same.

To further improve cultivation efficiency, the method of increasing outer surface area is chosen. In fermentation production, liquid surface cultivation is mostly used instead of liquid deep cultivation.

　

Bailun Biology150 liter stainless steel solid fermentation tank

The production process of solid fermentation is roughly as follows:

Production of bacterial strains - Solid or liquid strains - Inoculation - Solid fermentation tank - Fermentation - Drying of fermentation materials - Crushing - compounding - Testing - Packaging - Finished products.

The advantages of solid fermentation tanks are mainly manifested in the following three aspects:

(1)The culture medium is simple and widely available, mostly consisting of cheap natural substrates or industrial waste materials;

(2)The low moisture content of the substrate can greatly reduce the volume of the bioreactor, eliminating the need for wastewater treatment and minimizing environmental pollution;

(3)Low investment and relatively low energy consumption; The fermentation process generally does not require strict aseptic operations and has lower technical requirements;

(4)Reduce manual operations and make data searchable.

The solid fermentation system has the following functions:

(1)Sterilization in place. Steam is directly introduced into the fermentation tank, assisted by a special stirring system, to achieve in-situ high-temperature sterilization.

(2)Temperature and humidity control. Humidity digital display, using air volume for temperature feedback control, and adjusting material humidity using a fully atomized water replenishment system.

(3)Vaccination. Uniform inoculation under pressure difference is achieved during the fermentation process by utilizing the material mixing and crushing system in the tank to achieve uniform inoculation.

(4)stir. Special dragon style mixing slurry can fully mix the materials.

(5)Release materials. The tank body adopts a horizontal structure and is equipped with a discharge port on the side of the tank body, which can discharge the material cleanly.

(6)Breathe. The filter can be sterilized online to ensure clean air. The solid fermentation tank adopts an internal circulation method, using a stirring blade to disperse and crush bubbles. It has a high dissolved oxygen rate and good mixing effect

(7) Sampling. Special sampling port can achieve sterile sampling.

The main body of the fermentation tank is equipped with a sandwich layer, which can be heated, cooled, and temperature controlled. The tank body and the left and right oval heads are both processed by spinning R-angle, and the inner wall of the tank is polished with a mirror finish for hygiene. The fully enclosed design ensures that the materials are always mixed and fermented in a pollution-free state. The equipment is equipped with air breathing holes, CIP cleaning nozzles, sampling ports, inlet and outlet ports, and other devices.

Bailun Biology1000 liter solid fermentation tank

The practical application of solid fermentation tanks

The culture medium of solid fermentation tanks is simple, such as grains, wheat bran, wheat grass, bulk grains or agricultural products can be used, and the cost of fermentation materials is relatively economical. Pre processing of the substrate is less common than liquid fermentation, such as simply adding water to moisten the substrate, or simply grinding the substrate to increase the touch area, without the need for special equipment, and can be carried out in most households. Due to the ability to reduce bacterial contamination by obtaining water, this low sterilization process can be implemented for fermentation, making it suitable for use in low skilled areas.

Special products can be produced, such as red yeast rice producing ten times more red selenium than liquid fermentation, and Aspergillus producing glucosidase in solid fermentation that is more heat-resistant than enzymes produced in liquid fermentation. Solid state fermentation is suitable for using appropriately high culture media and can be carried out in smaller reactors, resulting in higher output per unit volume compared to liquid fermentation. The process of downstream recycling and purification, as well as waste disposal, is generally simplified or simple, often involving the use of the entire substrate. If used as a feed additive, there is no need for recycling and purification, and there is no question of waste. Solid fermentation can produce special flavors in food and improve its nutritional value. For example, Tianpei can be used as a substitute for meat, and its amino acids and fatty acids are easily digested and absorbed by the human body.

Solid state fermentation refers to the process where the raw materials for brewing are in a solid state. The raw materials are divided into main materials and auxiliary materials. The main material is grain, and the auxiliary materials are rice bran, bran, sorghum husk, and crushed corn cob. The main and auxiliary materials are mixed with water, and then mixed with koji. They are either compacted, loosened, sealed, or left to air to regulate temperature, humidity, and air, thereby regulating the growth of microorganisms, the activity of enzymes secreted by microorganisms, and a series of biochemical reactions. This process is fermentation.

Through fermentation, starch in grains is first broken down into sugar and then converted into alcohol, fat in grains is first broken down into various fatty acids and then converted into fatty acid esters and organic acids, and protein in grains is first broken down into various amino acids and then converted into alcohols, aldehydes, ketones, and nitrogen-containing compounds. These ingredients together make up wine, excluding water, with alcohol accounting for 99% and others only accounting for 1%. However, without this 1%, it would be just alcohol rather than wine. The wine thus brewed is the Baijiu produced by the traditional technology of solid state fermentation of pure grain.

In recent years, with the continuous progress of science and technology, the fermentation industry, which is related to the national economy and people's livelihood, has achieved rapid development, and fermentation tanks have also been updated from traditional to modern directions. In the future, the application of solid fermentation tanks will also become increasingly widespread.

Bailun Biotechnology 20000 liter production solid fermentation tank