Biomass energy refers to the type of energy that are derived from living organism and plants. These types of energy are called as lignocellulosic biomass. In biomass energy we will extract the energy directly by combustion which produce heat. Where as bio fuels are produced through the process of anaerobic digestion in which products such as soy, corn, sugarcane etc are fermented by microorganisms to produce useful gases like methane, butane, ethanol, etc. which are consider as Bio fuel and it is one of the major source of energy. e.g: Biodiesel.
This is the modern source of energy which we are using in our day to day activities. Biomass is derived from Living or recently dead organisms and any kinds of byproducts of those organisms, it may be plants, animals.