This document summarizes two main types of fermentation processes: solid state fermentation and submerged fermentation. Solid state fermentation occurs without free water and uses natural raw materials like grains as the carbon source to cultivate microorganisms. Submerged fermentation uses a liquid substrate and is best for microbes that require high moisture. Both methods have various applications, with solid state fermentation used for producing enzymes, biopesticides, and in bioremediation, while submerged fermentation is common in industrial manufacturing.