| See | 40 47 00 for refractories. 40 90 00 for process controls, cake weight scales, and other primary sensors and flow measurement instrumentation. 41 12 00 for sludge cake conveying equipment such as belt conveyor and screw conveyors. 42 13 00 for industrial heat exchangers and recuperators. 42 14 00 for industrial furnaces for industrial applications. 42 32 23 for fluidized bed material dryers used in industrial production processes. 44 10 00 for air pollution control equipment. 44 60 00 for systems and equipment for thermal processing of waste other than wastewater sludge, including co-incineration of sludge with solid waste and other wastes. 46 73 00 for sludge digestion and pasteurization. 46 76 00 for sludge dryers. |