SSF involves the cultivation of microorganisms on a solid substrate,
such as grains, rice, bagasse, paper pulp. and wheat bran.
The main advantage of using these substrates is that nutrient-rich
waste materials can be easily recycled as substrates
In this fermentation technique, the substrates are utilized very
slowly and steadily, so the same substrate can be used for long
fermentation periods.
Hence, this technique supports controlled release of nutrients.