Abstract: The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus directed to one or more of: (i) reducing the levels of NOx from one or more types of combustors, furnaces or boilers; (ii) reducing the levels of NOx from one or more types of biomass combustors, furnaces or boilers; or (iii) reducing the levels of NOx from one or more types of fluidized bed biomass combustors, furnaces or boilers. In one embodiment, the method and apparatus of the present invention permit the use of a less complex and/or expensive system to accomplish selective non-catalytic reduction (SNCR) and enable one to achieve DeNOx (NOx reduction) under low load or unit turndown operation for biomass combustion in a bubbling fluidized bed (BFB) boiler.