This document discusses various applications of industrial fermentation biotechnology. It covers microbial roles in food production including bread, dairy, alcoholic beverages, and preservation methods like canning, drying, and irradiation. It also outlines useful microbial products for pharmaceuticals like antibiotics, enzymes, and amino acids. The document concludes with alternative energy sources from bioconversion of methane or ethanol and microbial waste disposal through sewage treatment and bioremediation.