暨南大学：《环境学》课程教学资源（PPT课件讲稿）Chapter 7 固体废物污染 Solid waste pollution

inan universit Chapter 7 Solid waste pollution

Chapter 7 Solid waste pollution

Solid waste is anything discarded or unwanted in solid or semisolid form In some cases the waste material may contain a high percentage of water as in food wastes and sludge Jinan University

◼ Solid waste is anything discarded or unwanted in solid or semisolid form. In some cases, the waste material may contain a high percentage of water, as in food wastes and sludge

1 sources and classification of solid waste Garbage: Refers to food wastes Rubbish: Refers to either com bustible or non combustible solid waste constituents Combustible wastes would include paper, wood scrap, rubber, leather, etc. Non-combustible wastes are metals. glass. ceramics etc Jinan University

1 sources and classification of solid waste ◼ Garbage: Refers to food wastes. ◼ Rubbish: Refers to either combustible or non￾combustible solid waste constituents. Combustible wastes would include paper, wood, scrap, rubber, leather, etc. Non-combustible wastes are metals, glass, ceramics etc

1 sources and classification of solid waste Pathological wastes: dead animals, human waste, and hospital waste constitute pathological wastes Industrial wastes: Chemicals, paints, metal ore processing, fly ash, sewage treatment sludge, etc are the examples of industrial wastes Agriculture wastes: Farm animal manure, crop residues. etc Jinan University

1 sources and classification of solid waste ◼ Pathological wastes: dead animals, human waste, and hospital waste constitute pathological wastes . ◼ Industrial wastes: Chemicals, paints, metal ore processing, fly ash, sewage treatment sludge, etc. are the examples of industrial wastes. ◼ Agriculture wastes: Farm animal manure, crop residues, etc

2 Methods of waste disposal Until recently, the disposal of municipal solid waste did not attract much public attention. From prehistory through the present day, the favored means of disposal was simply to dump solid wastes outside of the city or village limits or in the back 40 Jinan University

2 Methods of waste disposal ◼ Until recently, the disposal of municipal solid waste did not attract much public attention. From prehistory through the present day, the favored means of disposal was simply to dump solid wastes outside of the city or village limits or in the “back 40

2 Methods of waste disposal Frequently, these dumps were in wetlands adjacent to a river or lake. To minimize the volume of the waste, the dump was often burned Unfortunately, this method is still being used in remote or sparsely populated areas in the world Jinan University

2 Methods of waste disposal ◼ Frequently, these dumps were in wetlands adjacent to a river or lake. To minimize the volume of the waste, the dump was often burned. Unfortunately, this method is still being used in remote or sparsely populated areas in the world

Jinan University

2 Methods of waste disposal

2 Methods of waste disposal As better waste-disposal technologies were developed and as values changed. more emphasis was placed on the environment and quality of life Simply dumping and burning our wastes is no longer an acceptable practice from an environmental or health perspective Jinan University

2 Methods of waste disposal ◼ As better waste-disposal technologies were developed and as values changed, more emphasis was placed on the environment and quality of life. Simply dumping and burning our wastes is no longer an acceptable practice from an environmental or health perspective

2 Methods of waste disposal a essentially, five techniques are used (1) landfills, (2 )incineration (3)composting, (4)source reduction ■(S) recycling Jinan University

2 Methods of waste disposal ◼ Essentially, five techniques are used: ◼ (1) landfills, ◼ (2) incineration, ◼ (3) composting, ◼ (4) source reduction, ◼ (5) recycling

2 Methods of waste disposal 2.1 Landfills

2 Methods of waste disposal 2.1 Landfills