Related Experiment Video
Updated: Apr 26, 2026
08:59
Measuring Sub-23 Nanometer Real Driving Particle Number Emissions Using the Portable DownToTen Sampling System
Published on: May 22, 2020
6.7K
Dealing with emerging waste streams: used tyre assessment in Thailand using material flow analysis
Paul Jacob1, Prakriti Kashyap1, Tasawan Suparat1
1Environmental Engineering and Management Program, Asian Institute of Technology, Pathumthani, Thailand.
Summary
Thailand
Area of Science:
- Environmental Science
- Waste Management
- Material Flow Analysis
Background:
- Global tyre waste is increasing due to urbanisation and automobile use.
- Waste tyre management is underdeveloped in developing countries like Thailand.
- Significant quantities of end-of-life tyres are improperly disposed of in the open environment or landfills.
Purpose of the Study:
- To describe the journey of waste tyres in Thailand.
- To quantify the flows and accumulation of waste tyres in Thailand in 2012.
- To analyse current waste tyre management practices, focusing on recycling, recovery, and disposal.
Main Methods:
- Material Flow Analysis (MFA) was employed.
- Quantified waste tyre flows and accumulation in Thailand for the year 2012.
- Examined disposal and recycling/recovery methods.
Main Results:
- In 2012, Thailand's waste tyre management heavily favoured destructive technologies (48.9%).
- Material recovery methods (rubber reclamation, retreading, tyre applications) accounted for only 6.7% of waste tyres.
- A substantial 44.4% of used tyres were openly dumped, with 0.05% sent to landfills.
Conclusions:
- Waste tyre management in Thailand in 2012 was predominantly destructive, not focused on material recovery.
- There is a significant gap between the potential economic and environmental benefits of waste tyre recycling and current practices.
- Urgent need for improved policies and strategies to enhance waste tyre recycling and sustainable management in Thailand.
Related Concept Videos
01:21Rolling Resistance
815
When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down due to...
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down due to...
815
01:09Rolling Without Slipping
4.3K
People have observed the rolling motion without slipping ever since the invention of the wheel. For example, one can look at the interaction between a car's tires and the surface of the road. If the driver presses the accelerator to the floor so that the tires spin without the car moving forward, there must be kinetic friction between the wheels and the road's surface. If the driver slowly presses the accelerator, causing the car to move forward, the tires roll without slipping. It is...
4.3K
01:28Logarithmic Differentiation
177
When a car’s weight and driving forces act on a tire, they impose an external load on the rubber material. This load is resisted internally by forces distributed throughout the tire structure, which are defined as stress. The resulting deformation of the rubber due to this stress is quantified as strain. The relationship between stress and strain governs how the tire deforms under load and is central to understanding its mechanical response during operation.Rubber exhibits a nonlinear...
177
01:17Rolling Resistance: Problem Solving
984
Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
984
01:14Rolling With Slipping
6.9K
Rolling with slipping is a physical phenomenon that occurs when a rolling object experiences both rotational and linear motion but also experiences frictional forces that cause slipping. This phenomenon can occur in various situations, such as when a tire rolls on a wet road or a ball rolls on a rough surface.
An object's rolling motion is characterized by its rotation around its axis, while linear motion refers to the object's translational motion along a surface. Frictional forces can...
An object's rolling motion is characterized by its rotation around its axis, while linear motion refers to the object's translational motion along a surface. Frictional forces can...
6.9K
01:19Turnover Number and Catalytic Efficiency
16.0K
The turnover number of an enzyme is the maximum number of substrate molecules it can transform per unit time. Turnover numbers for most enzymes range from 1 to 1000 molecules per second. Catalase has the known highest turnover number, capable of converting up to 2.8×106 molecules of hydrogen peroxide into water and oxygen per second. Lysozyme has the lowest known turnover number of half a molecule per second.
Chymotrypsin is a pancreatic enzyme that breaks down proteins during digestion....
Chymotrypsin is a pancreatic enzyme that breaks down proteins during digestion....
16.0K