nature of the treatment process. At present their collection is not the charge of most municipal agencies responsible for solid waste management. However, wastewater treatment plant sludges are commonly co-disposed with MSw in municipal landfills. In the future, the disposal of treatment plant sludges will likely become a major factor in any solid waste management plan Materials remaining from the combustion of wood coal, coke, and other combustible wastes are categorized as ashes and residues.( Residues from power plants normally are not included in this category because they are handled am processed separately. These residues are normally composed of fine, powder materials, cinders, clinkers, and small amounts of burned and partially burned materials Glass, crockery, and various metals are also found in the residues from municipal incinerators Industrial Solid waste excluding Sources and types of solid waste generated at industrial sites, grouped according to their Standard Industrial Classification(SIC), are reported in Table 13-1. This list excludes industrial process wastes 最量 邕 8 -月 邕 &8部a品 手8 当 o居g 冒量 多 雪238 学 8苏 13-313-3 nature of the treatment process. At present their collection is not the charge of most municipal agencies responsible for solid waste management. However, wastewater treatment plant sludges are commonly co-disposed with MSW in municipal landfills. In the future, the disposal of treatment plant sludges will likely become a major factor in any solid waste management plan. Materials remaining from the combustion of wood, coal, coke, and other combustible wastes are categorized as ashes and residues. (Residues from power plants normally are not included in this category because they are handled am processed separately.) These residues are normally composed of fine, powder materials, cinders, clinkers, and small amounts of burned and partially burned materials. Glass, crockery, and various metals are also found in the residues from municipal incinerators. Industrial Solid Waste Excluding Process Wastes Sources and types of solid waste generated at industrial sites, grouped according to their Standard Industrial Classification (SIC), are reported in Table 13-1 . This list excludes industrial process wastes and any hazardous wastes that may be generated. Tab 13-1 Sources and types of industrial wastes