44 00 00 Pollution and Waste Control Equipment
44 60 00 Waste Thermal Processing Equipment
44 61 00 Waste-to-Energy Plants 44 62 00 Fluidized Bed Combustion Equipment 44 63 00 Rotary Kiln Incinerators 44 64 00 Gasification Equipment 44 65 00 Pyrolysis Equipment 44 66 00 Hazardous Waste and Medical Waste Incinerators 44 67 00 Heat Recovery Equipment for Waste Thermal Processing 44 68 00 Synthesis Gas Cleanup and Handling Equipment