Solid Waste Management Definition of Solid Waste All

Solid Waste Management Definition of Solid Waste: All the waste arising from human and animal activities that are normally solid and that are discarded as useless and unwanted

Solid Waste Management Types of solid wastes: 1 - Municipal : 1 -1 - Residential 1 -2 - Commercial 1 -3 - Open area 1 -4 - Treatment plant waste: sludge including: Food wastes, rubbish, ashes , special waste Rubbish: Paper , cardboard, plastic, wood, leather, …

Solid Waste Management Types of solid wastes: 2 - Industrial : Construction waste 3 - Hazardous: 3 -1 - Ignitability 3 -2 - Corrosive 4 -3 - Reactivity 4 -4 - Toxicity

Solid Waste Management

Solid Waste Management Solid waste Characteristics: Physical composition of solid wastes: 1 - Individual components: Food wastes, plastics, metal, glass, wood, … 2 - Particle size 3 - Moisture contents 4 - Density Chemical composition of solid wastes: For Incineration

Solid Waste Management Solid waste management- an Overview Functional elements of management 1 - Waste generation 2 - handling/ storage and on-site process 3 - collection 4 - Transfer and Transport 5 - Processing/ recovery 6 - Disposal

Solid Waste Management Waste generation Handling/ storage and on-site processing Collection Transfer and Transport Processing/ Recovery Disposal

Solid Waste Management Solid waste management- an Overview 1 - Waste generation rate: Kg/capita. d Tehran: 700 - 800 g/Capita. d Commercial: Restaurant: 0. 2 -0. 8 kg/ customer. d

Solid Waste Management Solid waste management- an Overview Factor that waste generation rate: 1. Geographical location 2. Season of the year 3. Collection frequency 4. Use of kitchen waste grinder 5. Extent of recycling 6. Public attitudes 7. Legislation

Solid Waste Management 2 - handling/ storage and on-site process Ø Small containers Ø Plastic bags ------ Biodegradable bags Ø Medium size container Ø Large size container On – Site Processing: • • Manual Sorting Compaction Incineration Home-composting

Solid Waste Management Solid waste management- an Overview 3 - Collection: Types of collection systems: • Hauled container system ( HCS) • Stationary container system ( SCS)

Solid Waste Management Hauled container system ( HCS) Transfer station/ Disposal Site

Solid Waste Management Stationary container system (SCS) Transfer station/ Disposal Site

Solid Waste Management 4 - Transfer and Transport Transfer Station : Feasibility Study Transport Methods: Ø Motor vehicle transport Ø Railroad Ø Pneumatic Ø Water transport

Solid Waste Management

Solid Waste Management 5 - Processing/ recovery Aims: 1. Improve the efficiency of solid waste disposal 2. To recover resource 3. To recover energy from wastes Common Methods: 1. Manual components separation, 2. Mechanical volume reduction, 3. Thermal volume reduction

Solid Waste Management Solid waste management- an Overview 6 – Final Disposal 1. Landfilling ------ site selection , Operation and Maintenance, Gases and leachate collection 2. Land farming 3. Composting 4. Incineration 5. Deep well injection

Land filling –I

Land filling –II

A Typical Composting flow chart Ref: http: //whatiscivilengineering. csce. ca/environmental_composting. htm

Composting

Incineration

Incineration