西安建筑科技大学：《环境学 Environmentology》双语课程电子课件_Unit 9 Solid Waste Management and Disposal

Environmental science A Study of interrelationships Unite 9 Solid Waste Management and disposal

Unite 9 Unite 9 Solid Waste Management and Disposal Solid Waste Management and Disposal Environmental Science Environmental Science A Study of interrelationships A Study of interrelationships

Introduction Solid waste(固体废弃物) Solid waste means any garbage or refuse sludge from a wastewater treatment plant, water supply treatment plant, or air pollution control facility; and other discarded material, including solid, semi-solid resulting from industrial, commercial, mining and agricultural operations, and from community activities Industrial solid Waste ◆ Mining Solid Waste Q Agricultural Solid Waste Municipal solid Waste

Solid waste means any garbage or refuse; sludge ; and other discarded material, . including solid, semi-solid resulting from industrial, commercial, mining, and agricultural operations, and from community activities from a wastewater treatment plant, water supply treatment plant, or air pollution control facility ◆ Industrial Solid Waste ◆ Mining Solid Waste ◆ Agricultural Solid Waste ◆ Municipal Solid Waste Solid Waste (固体废弃物 ) Introduction

Industrial solid Waste Approximately 635 million tons of industrial waste per year Fig. 1 Industrial solid waste(left)and it's disposal (right)

Fig. 1 Industrial solid waste (left) and it’s disposal (right) Approximately 635 million tons of industrial waste per year ◆ Industrial Solid Waste

◆ Mining solid Waste Waste from extraction and processing of mineral resources which is one of the largest waste streams in many countries The U.S. Geological Survey: 1700 million tons of mining waste are produced each year Fig 2 Mining solid waste(left)and it's disposal (right)

◆ Mining Solid Waste Fig. 2 Mining solid waste (left) and it’s disposal (right) Waste from extraction and processing of mineral resources, which is one of the largest waste streams in many countries. The U.S. Geological Survey: 1700 million tons of mining waste are produced each year

Agricultural solid Waste Animal health products Vehicle and Machinery waste Building waste Plastic Packaging Non-packaging plastic Approximately 3000 million tons of agricultural waste are generated each year Fig. 3 Agricultural solid waste

Non-packaging plastic Plastic Packaging Building waste Vehicle and Machinery waste ◆ Agricultural Solid Waste Fig. 3 Agricultural solid waste Approximately 3000 million tons of agricultural waste are generated each year. Animal health products

Municipal solid waste Approximately 210 million tons of waste per year Fig. 4 Municipal solid waste(left) and it,'s disposal (right)

Fig. 4 Municipal solid waste (left) and it’s disposal (right) ◆ Municipal Solid Waste Approximately 210 million tons of waste per year

Solid Waste Management ndustrial Mining waste Agricultural Municipal waste waste waste consume a large area of land lack of dumping land Potential effects on groundwater and air quality decreased landfill site E increased operating cost Y角 Need long-term solutions to reduce

◆ increased operating cost Industrial waste Mining waste Agricultural waste ◆ consume a large area of land / lack of dumping land Municipal waste Solid Waste Management Need long Need long-term solutions to reduce term solutions to reduce …… ◆ decreased landfill site ◆ Potential effects on groundwater and air quality

The nature of the problem Wherever people exist, waste disposal is a problem. The effect of lifestyle on solid waste production The waste generation rate of people are 1000 directly related to 00 their economic condition People in richer countries produce more garbage than those in poor countries Fig. 5 Municipal solid waste generation and lifestyle

The effect of lifestyle on solid waste production ‘Wherever people exist, waste disposal is a problem. ’ Fig. 5 Municipal solid waste generation and lifestyle The waste generation rate of people are directly related to their economic condition. People in richer countries produce more garbage than those in poor countries. The nature of the problem

Paper products are the largest component of the waste stream The amount of plastics in the waste stream was increased significantly 1970 Fig. 6 The changing nature of trash

Fig. 6 The changing nature of trash Paper products are the largest component of the waste stream The amount of plastics in the waste stream was increased significantly

Paper and yard waste are the most common material disposed of, accounting for about 50% of the waste stream 10 0 Fig 7 Composition of trash in the United States(2000)

Fig. 7 Composition of trash in the United States (2000) Paper and yard waste are the most common material disposed of , accounting for about 50% of the waste stream