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CHAPTER 5 RECYCLING & REUSE (RECYCLABLE…
CHAPTER 5
RECYCLING & REUSE
RECYCLABLE MATERIALS
Glass
100% recyclable
, continuously
Never decompose
Plastics
Polyethylene Terephthalate (PET)
High Density Polyethylene (HDPE)
Low Density Polyethylene (LDPE)
Poly Vinyl Chloride (PVC)
Polypropylene (PP)
Polystyrene (PS)
Paper
Tyres
Tyre pose environmetal problems if not separated from waste materials
Burning will release thick smoke and toxic chemicals
Attract mosquitoes & rodents if piled up
Construction and demolition waste
"White goods"
The metal parts of these goods are usually recycled after removing the non-metallic parts containing the chemicals if any.
E-waste
Aluminium Can
FACILITIES
Material Recovery Facility (MRF)
Separation at Source
Separation at Facility
Recycling Processes
REUSE OF WASTE PRODUCTS
1 recycle tin
= 3h power for a television
Aluminium cans
can be recycled & ready to use in just 6 weeks
1 recycled
GLASS
bottle = 25 min energy to power up computer
70% less energy
,
73% less air pollution
for recycle paper instead of making it from raw materials
24 tress required for 1 ton newspaper
1 recycle
PLASTIC BOTTLE
= power for 60W light bulb, 3hours
MASS BALANCE
Accumulation = Inflow - Outflow + Generation
dM/dt = ∑Min - ∑Mout + rw
dM/dt
= Rate of change of the weight of material stored
∑Min
= Sum of all of the material flowing into study unit
∑Mout
= Sum of all of the material flowing out of study unit
rw
= rate of waste generation
ENVIRONMENT BENEFITS
Reduce the amount of rubbish sent to the landfill
Save energy and raw materials
Help tackle climate change
RECYCLING PROGRAM ALTERNATIVES
Drop boxes, drop off centers, buyback centers for recyclable
Return of bottle bill containers or use of reverse vending machines
Fully automated separation of recyclables from raw waste
ENVIRONMENTAL IMPACTS
Groundwater contamination
Dust Emissions
Collection operations
Processing facilities
Noise
Collection vehicles
Machinery
Vector Impacts
Odor Emissions
Vehicular Emissions
Large electrical goods used domestically such as refrigerators and washing machines, typically white in colour.
Sought after due to high revenue and less energy to manufacture 'new' cans.
New road usage by retreading tyres (saving new raw materials)
Shredded tyres can be used as incinerators' fuels
Recover oil and gas by pyrolysis
Inert material and do not pose threat to the environment directly. Containers such as bottles and jars are suitable for recycling.
Newspaper, corrugated and office papers are the important sources
Concrete, bricks, woody materials, scrap metals, copper wires, pipes, pavement, paper, cardboard, shingles, beverage containers, carpets and others
Waste arising from electronics goods
Buildings/Facilities where various recyclable materials are housed for sorting and distribution
Separating solid waste at source involves separating solid waste according to waste composition.
filtration or screening device, settling tank, settling basin, or settling channel used to separate a portion of solids from a liquid waste stream
process of collecting and processing materials that would otherwise be thrown away as trash and turning them into new products. Recycling can benefit your community and the environment.
groundwater resources are not affected by recycling
MRF constructed on concrete pad preventing seepage of any wasre pollutants into the soil
can be control with machinery used to control noise and dust
CPE655 SOLID WASTE MANAGEMENT
ALUMINIUM
is called
"Energy Bank"
because of the energy saved up to
95%
in recycling.
