NOVELTY - Hot gas is supplied to the gasifier cell (20) supplied with fuel from a fuel input system (280). A mixture of gases, char and ash is exhausted from an upper portion of the gasifier cell.    USE - For power generating plants which produce electrical energy for consumer, commercial and industrial applications.    ADVANTAGE - Reduces the use of fossil fuels that introduce greenhouse gases into the atmosphere, as biomass is used in supplemental manner that does not require direct mixing of biomass and fossil fuel.    DETAILED DESCRIPTION - A bed (40), fluidizing gas plenum and multiple manifolds are provided in the fluidized bed gasifier cell. A space is formed between adjacent manifolds to pass the tramp material downwardly and multiple nozzles are supported by each manifold to release gas. A cyclone (140) has an input connected with fluidized bed gasifier cell for receiving mixture of gases, char and ash from an upper portion of the gasifier cell and for separating the mixture into low BTU gas mixture and ash and char mixture. A bed change out system (120) connected with the gasifier, removes tramp, clinkers and other waste from the bed. A char combustion cell inlet is connected to outlet of high temperature gas clean-up system to oxidize the char at elevated temperature. A heat exchanger inlet is connected to outlet of the char combustion cell to receive gas from cell and to remove heat energy. A gas clean-up unit comprises cyclone, multi-clone unit, electrostatic precipitator, ceramic filter and baffle device. The gas clean-up unit inlet is connected to outlet of heat exchanger to receive gas from heat exchanger, remove ash from gas and exhaust the cleaned gas through an outlet. The inlet of fluid bed gasifier fan (260) is connected to outlet of gas clean-up unit to force the gas mixture of cleaned gas and additional gas at high pressure into a heat exchanger. The gas mixture is heated to exhaust from the heat exchanger outlet and deliver to the fluidizing gas plenum of the gasifier cell.    DESCRIPTION OF DRAWING(S) - The figure shows the diagrammatic view of biomass gasifier.    Gasifier cell (20)    Fuel input system (280)