What are the advantages and disadvantages of solid state fermentation and liquid fermentation?

One, solid state fermentation:

Advantages:

1, low water activity, high water insolubility of the substrate, microbial growth, high enzyme activity, enzyme system is rich;

2, the fermentation process is rough, do not need to be strict aseptic conditions;

3, the equipment structure is simple, low investment, low energy consumption, easy to operate;

4, simple post-treatment, less pollution, basically no waste discharge.

4, simple post-treatment, less investment, low energy consumption, easy to operate.

Disadvantages:

1, limited to microorganisms resistant to low water activity, fewer choices

2, slow fermentation rate, long cycle

3, natural raw materials, the composition of the complex, and sometimes changes, affecting the quality of the yield

4, the process parameters are difficult to detect and control

5, the product is less, the operation of the consumption of labor more, the intensity of the large

2, liquid fermentation

Advantages:

1, fast

2, simple process, low cost, very low barrier to entry

3, high yield

Disadvantages: due to the rapid production of alcohol, few other components are basically no, need to artificially add flavors to supplement the other components. From the point of view of the difference between the production process and quality, the new process of liquor in the aroma of the material is very little, and its quantity than the relationship is also very simple, resulting in the new process of liquor aroma, flavor, taste, far from the level of the traditional pure grain solid state fermentation products.