However, there are many problems with solid state fermenter, such as the large area of fermentation tanks, large labor intensity, difficulty in mass, heat transfer, parameters (such as material pH value, material temperature, material humidity, bacterial proliferation, product production amount ) Difficult detection, etc.
With the advancement of fermentation technology, the disadvantages of the existence of solid state fermenter are gradually overcome, and the solid fermentation of a few developed countries has achieved mechanized scale production. In recent years, my country’s solid fermentation technology has also developed, and various forms of solid material fermentation tank equipment has emerged. So far, it is impossible to determine what kind of fermentation equipment is an ideal solid material fermentation equipment. Various forms of solid material fermentation equipment has their own advantages and disadvantages. Many problems need to be studied and resolved.
The existing solid state fermenter equipment is mainly used in large ponds, shallow plates, boxes, turntables and other forms. Most of the sterilization of materials is separated from the fermentation process. Most of them use natural ventilation during the fermentation process. , Little production capacity, difficult to control the sterilization environment, and high pollution rate of fungi.
What is solid state fermenter:
Solid state fermentation refers to a biological response process of one or more microorganisms in the underwater solubility solid substrate with a certain humidity in the water -soluble solid substrate with a certain humidity. From the essence of the biological response process, solid state fermentation is a biological response process that uses gas as a continuous phase. Solid state fermentation has the advantages of simple operation, low energy consumption, easy to control the fermentation process, relatively low sterile requirements, and not prone to large -scale pollution.
A fungi is the most commonly used microorganisms in solid state fermentation. Because its mycelium is like a plant’s root, it can grow on the solid surface and penetrate into the matrix to produce a variety of extracellular enzymes. Compared with other single -cell bacteria and yeast, More suitable for solid fermentation environments.
2.The working principle of the solid state fermenter:
Microbial growth is fermented in the matrix of humid and insoluble water, and does not contain any free water during the solid state fermentation process. As the free water produced by microorganisms increases, the range of solid state fermentation is extended to viscous fermentation and solid particles suspended fermentation. It can be considered that the growth environment between each cell may not be the same. In order to improve training efficiency, the method of increasing the surface area is adopted.
In the laboratory, IVINS, Cultiville, Triangle Bottle, and Kesh Bottle are generally used. Most of the factories use curved plates, curtains, and ventilation tune pools. Especially in the cultivation of mold, solid training legal songs are still used. Because of the selection of agricultural and sideline products such as bran as raw materials, the price is low, its particle surface area is large, loose ventilation, and raw materials are easily obtained. Therefore, the winemaking industry is commonly used. However, because there are still many difficulties in large -scale surface training technology. In terms of fermentation production, most of them can be cultivated with liquid surfaces. Most of the liquid deep culture methods can be used to replace.
Application of solid state fermenter:
Microchace inoculation on the surface of the solid medium grows and reproduce is called solid training method. It is a kind of surface cultivation. Widely used to cultivate good microorganisms. For example, the plank culture for the observation or preservation of microbial form observation or preservation is a flat -flat culture for tablet separation or living cell counts.
Solid state fermenters are suitable for solid -state samples, organic waste, natural or contaminated solid samples, mud degradation research, and are also suitable for fast microorganisms to degrade evaluation, which can quickly optimize process conditions, and can produce enzyme products and other biological activity synthesis.
The solid state fermentation method is currently used in the traditional fermentation industry. For example, the production of soy sauce, from the cultivation of the bacteria to the curvature, to the fermentation, the solid fermentation method is adopted. The fermentation conditions are relatively open, the craftsmanship is simple, the equipment requirements are simple, and the cost is relatively low. Although some manufacturers also use deep liquid fermentation, it is obviously incomparable with solid fermentation in taste.
Another example is that in the production of vinegar, solid state fermentation is conducive to improving the flavor of vinegar. Vinegar brewing technology is mainly divided into two types, full solid state fermentation, first liquid and then solid -state fermentation, solid state fermentation vinegar is rich in organic acid, amino acids and various flavors compared to liquid fermentation vinegar. Taste and nutritional ingredients have won the favor of more and more consumers.
At present, the total sales volume of pure grain all solid -state fermentation vinegar is 5%. With the upgrading of the consumption structure and the driving consumer demand, the increase in the increase in pure solid -state fermentation vinegar is close to 20%, and the total production and sales of 3.5 million tons are calculated as the calculation. The market share of pure solid state fermentation vinegar eaters will increase from 175,000 tons to 700,000 tons, which will increase the huge market prospects in the huge space.
The development trend and application prospects of solid state fermenter
At present, many industrial and agricultural residues and urban domestic garbage have become the public harm of people, which has a adverse effect on human living environment. Solid -state fermentation technology can be used as a large amount of substrates to produce chemical substances in a variety of industrial and agricultural residues. It is in the laboratory in the laboratory During the research stage, solid -state fermentation is considered to be the most promising way to comprehensively use renewable resources, and it is an effective means to solve the “three major” crisis facing the current human beings. Therefore, the solid state fermenter as the carrier of solid -state fermentation technology also has corresponding good prospects.