A bio-refinery could also be a middle that melds biomass conversion processes and equipment to manufacture fuels, power, heat, and chemicals from biomass. The bio-refinery concept is parallel to today's oil refinery, which makes various fuels and products from petroleum. Bio-refining is that the sustainable conversion of biomass into a spectrum of bio-based products and bioenergy. By producing various products, a bio-refinery takes advantage of the various parts in biomass and their intermediates therefore maximizing the worth acquired from the biomass feedstock. A biorefinery could, as an example, manufacture one or several low-volume, but high-value, chemical or nutraceutical products and a low-value, but high-volume liquid transportation fuel like biodiesel. At an equivalent time generating electricity and process heat, by combined heat and power (CHP) technology, for its own use and maybe adequate purchasable of electricity to the local utility. The high-value products boost profitability, the high-volume fuel helps meet energy needs, and thus the facility production aids to lower energy costs and minimize greenhouse gas emissions from conventional power station facilities. Although some facilities prevail which will be called bio-refineries, the bio-refinery has yet to be fully accomplished. Future biorefineries may play an important role in yielding chemicals and materials that are traditionally extracted from petroleum.