Post on 13-Nov-2014
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By S. VIJAYAKUMAR M. K. SANIL M. NISHA T. M. SHABIN ALI
WASTEAn unusable / unwanted
WASTE MANAGEMENTCollection source separation storage transportation transfer processing treatment disposal of waste
substance or material.Rejected as worthless.
Eg) Rubbish, trash, garbage or junk
WASTE MANAGEME NT@ To extract maximum practical benefits. @ To generate minimum amount of waste. @ Reduce negative impacts - on environment & society.
TYPES OF WASTES
*Domestic wastesmeat remnants
SOURCES OF WASTES- Eg) paper, plastic, glass, ceramics, vegetable wastes - Eg) printer paper,
*Commercial wastes *Ashes
- Eg) coal, wood and coke.
- Open burning of wastes also generates ashes
*Animal Wastes- rejected feed
- Eg)dung of animals
- Eg) expired drugs, plastic syringes, surgical dressings
*Industrial Solid Wastes *Sewer
- Eg) metal rods, bricks, cement, concrete, roofing materials - digging activities Eg) telephone, electricity, drainage -Eg) garment factory would dump textiles of various kinds - removed from sewerage left on the roadside
*Hazardous wastes *E-
dangerous - react explosively with air or water - Change in the genetic structure of individuals Waste - electronics disposed
*Nuclear wastematerial fission
-E.g.) Secondary computers, electronics, mobile phones, television sets & refrigerator - containing radioactive - product of a nuclear
Effects of waste If not managedAffects our health Affects our socio-economic conditions Affects our coastal and marine
environment Affects our climate Rise in global temperatures Rise in sea levels
Methods of Waste Mgmt.Disposal Methodsc) Land fillsConvenient Inexpensive Destruction of food sources Desalination
Recycling methods a) Biological reprocessing b) Energy recovery i)Pyrolysis ii)GasificationKey to providing a livable environment for the future
IncinerationRequires minimum land Can be operated in any weather
Expensive to build and operate Continuous maintenance
Expensive Some wastes cannot be recycled Technological push needed
Practical IssuesLack of awareness Unplanned growth and development of cities Land availabilty Un sorted waste. mixture of bio-degradable
and non bio-degradable Some wastes cannot be recycled Unsightly - smell, waste, vermin requires proper planning, design, and operation
Bio-Methanation ProcessMaterials that are organic in nature, such as
plant material, food scraps convert starch or sugary agricultural feed stock into a methane rich gas mixture three stages, namely, hydrolysis, acid-genesis and methane formation Process is very slow Installing is expensive.
Suggestions Improve product design to use less materials. use biodegradable materials maintenance of cleanliness in yards and streets At Source Treatment, Separation of materials
should be done at source Encourage eople to reuse materials rather than purchase new ones.
Case Study Name of Project : CochinWaste 2 Energy Pvt Ltd Type of Process : BESI W2E Gasification Technology Capacity : 35 tons/day Land Area : 1 Acre Location : Willington Island, Cochin Type ofWaste : Industrial effluent Sludge, e-waste,Biomedical
waste,food waste, Wood waste, Power Generation : 1 Mega Watt per hour. SolidWaste generated from Plant: Recovered sterilized metals for recycle. Vitrified glass. Inert Ash Revenue Stream : Tipping fee. Sale of Power generated. Residue. Carbon Credits Collection Mechanism :Through specially designed enclosed refuse trucks meeting international norms Waste Stream Analysis : School of Environmental Studies, CUSAT