Applied microbiology is one of the fundamental branches of biotechnology, as it plays a role in the production and isolation of products obtained or used from microorganisms. The major products of microorganisms include microbial enzymes, microbial biomass, metabolites and compounds derived from microbial transformation. Large amounts of microbial enzymes are produced on an industrial scale, especially hydrolytic enzymes, i.e., amylases, proteinases, lipases, cellulases, and others. These enzymes are used in various industries, but due to increasing environmental pollution and the need to remediate contaminated soils, they are also successfully used in bioremediation process. In bioremediation, microorganisms (and their enzymes) are used to reduce the concentration of pollutants in the soil, usually by degrading them to less or non-harmful products (carbon dioxide, water and biomass).