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Hazardous Waste
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To investigate the effect of hazardous waste that will be occurs to surrounding.
To examine the hazardous waste situation which produce by communities
To identify the ways to treat and minimize generation of hazardous waste
Hazardous waste are increasing each year.
The depletion of space for landfill.
No. Category of Waste Quantity of waste
1. Dross/ Slag/Clinker/ Ash 364,425.95
2. Gypsum 337,771.68
3. Mineral Sludge 316,938.39
4. Oil & Hydrocarbon 154,113.37
5. Heavy Metal Sludge 120,793.29
waste that is left after coal is combusted
contains heavy metals
- arsenic
- lead
- mercury
- cadmium
- zinc, etc
If eaten, drunk or inhaled, these toxicants can cause
- cancer
- nervous system impacts such as cognitive deficits,
developmental delays and behavioral problems.
- heart damage
- lung disease
- respiratory distress
- birth defects
Ash from Coal Plant
Thermal Plasma Furnace
Thermal Plasma Torches
Heat Exchanger
Bag Filter Water Quench &
Scrubber
Synthetic Gas(Syngas) Combustion Chamber Stack
Output : Water-Quenched Vitrified
Slag
used for the treatment of a wide range of wastes including
liquids, solids and gases
The high heat flux densities at the reactor boundaries
lead to fast attainment of steady state conditions. This
allows rapid start-up and shutdown times, compared
with other thermal treatments such as incineration,
without compromising refractory performance.
Add limited quantity of O2, no fuel is combusted
Reducing environment
Prohibiting generation of Nox and SOx
Chemical
Composition
wt.%
CaO 28.2
SiO2 38.3
Al2O3 14.3
MgO 2.0
Fe2O3 9.0
Na2O 2.7
Cl 0.001
Ignition Loss 0.37
Water- Quenched Vitrified Slag
Trial Paving
Desired Gradation
Selection Trial Gradation
Mixing
Asphalt Aggregates
A ( with natural construction aggregate)
B ( with water-quenched vitrified slag)
Surfacing, Asphalt concrete (Additive of
water quenched vitrified slag, 5%)
Sub base (Additive of water quenched
vitrified slag, 10%)
Base (Additive of water quenched vitrified
slag, 20%)
5cm
10cm
20cm
Paving Area of Asphalt Concrete
Pavement
Paving Depth and Additive of water quenched vitrified slag
Location A B
Pavement Density (%) 92.5 92.3
Stiffness (MNmm-1) 32.8 36.6
British Pendulum Number (BPN)
75 75
66 wt% Water- Quenched Vitrified Slag
Binder Waste Ceramic
Mixing
Granulating and Molding
Drying at Room Temperature
Sintering at 900 C
Zn Pb Cd Cr Cu Hg As
Fly ash 1.5 5.5
In Malaysia, ash produced from incinerators undergo stabilization or solidification to meet Toxicity Characteristic Leaching Procedure (TCLP) before disposal.
This solution
prevents effect of hazardous waste exposed to environment
the recycling of them as construction raw material
Reduce usage of natural aggregate
helps to reduce waste dispose and amounts of landfill