NOVELTY - Poultry droppings and similar biomasses are treated by production of solid fuel through heating of poultry droppings under vacuum, in current of steam at temperature of 250-480 degrees C. The treatment method is achieved by the use of a plant consisting of reactor (10), supplied under vacuum through chambers divided by valves. The plant comprises stirrer with blades, which causes mixing and infeed of material from entry point towards exit point at variable speed according to the nature of the product and its humidity.    USE - Method is used for treatment of poultry droppings and similar biomasses (claimed) for production of alternative fuel energy, particularly production of energy from animal organic waste.    ADVANTAGE - The heat treatment of poultry droppings which is relatively easy to carry out, thus does not excessively affect production costs. The method is applicable to all types of poultry droppings (or excrement biomass), regardless of content of humidity; has no atmospheric emissions of any molecule harmful to man (furans, dioxins, fine dust, odors); provides by-products that can be used in agriculture, possibly within same business that produces the biomass; returns water, air and solids to environment without impact and respecting relative regulations; is energetically compatible and independent; and covers costs of production cycle and produces profit; consist of plants that can be dimensioned according to requirements of user business.    DETAILED DESCRIPTION - Poultry droppings and similar biomasses are treated by production of solid fuel through heating of poultry droppings under vacuum, in current of steam at temperature of 250-480 degrees C. The treatment method is achieved by the use of a plant consisting of reactor (10), supplied under vacuum through chambers divided by valves. The plant comprises stirrer with blades, which causes mixing and infeed of material from entry point towards exit point at variable speed according to the nature of the product and its humidity. The flows of steam are injected as required on entry side by a steam generator (11) and extracted near discharge point with the volatized substances passing through condenser (12) and then to vacuum system (13) with scrubbing effect on incondensable products.    DESCRIPTION OF DRAWING(S) - The drawing is a block diagram showing a process for conversion of poultry droppings to solid fuel.    Reactor (10)    Steam generator (11)    Condenser (12)    Vacuum system (13)    Evaporator (15)