46 70 00 Water and Wastewater Residuals Handling and Treatment
46 78 00 Thermal Treatment of Residuals
46 78 13Multiple-hearth Sludge Incinerators46 78 23Fluidized-bed Sludge Incinerators46 78 33Ash Handling Equipment46 78 41Recuperative Air Preheating Equipment46 78 46Regenerative Thermal Oxidizers46 78 47Waste Heat Recovery Boilers46 78 49Waste Heat Recovery Heat Exchangers46 78 73Thermal Oxidation Equipment