A fermentor or fermentation chamber is a type of bioreactor for containing and controlling fermenter microorganisms. Fermentation is an economical route to important raw materials (ethanol, lactic acid) and fermented foods. A fermentor must control temperature and keep the chamber anaerobic (free of oxygen) to optimize conditions for desired microbial fermentation. Fermentation is a basic and highly developed art, as well a pursuit of hobbyists. Necessary public information is available to create an economical and high performance OSE fermentor to complete certain product ecologies.