GolDN: IIT Bombay Creates
Equipment to Recycle Plastic Waste
Bombay researchers have created a device called GolDN that uses melt-mixing
to mechanically recycle waste plastic polymers. With the help of this local
single screw extruder, thermoplastic waste may be turned into composites that
are then molded into products like bricks, tiles, and paver blocks.
Equipment Available for
Commercial Use Has Its Limitations
Melt-mixing equipment that is
available for purchase is not appropriate for recycling waste polymers that
contain impurities. Their screw and barrel systems are not very strong. GolDN
uses a customized design to get around these restrictions.
Essential Elements of the
GolDN enables effective
continuous melt-mixing in a lab setting, simulating real-world recycling, of
waste thermoplastics and inorganic fillers.
For optimal mixing performance,
parameters such as clearance depth and compression ratio have been tuned.
Contamination-containing waste polymer can be handled thanks to robust
Additionally, the researchers
have created auxiliary tools, like as a thermogravimetric analyzer, for use in
analyzing the composites that GolDN produces. Material variability is
incorporated within its huge 200g sample size.
Pilot Plant Infrastructure
A pilot-scale recycling facility
including a GolDN extruder as its key component has been constructed. Shredded,
pre-heated, and conveying are examples of additional capabilities that enable
full waste plastic to product conversion.
Potential Impact and
This technology has been
developed with support from DST and is ready for commercial usage. Low costs
are ensured by indigenous manufacture, making lab-scale polymer waste recycling
The device can help the plastics
sector and urban local bodies recycle collected plastic garbage more
efficiently if it is scaled up. This deals with plastic resource circularity as
well as environmental pollution.
Importance of This Technology
Every year, around 68.6 million
tonnes of plastic waste enter the ecosystem and worsen the state of the
Over 50% of the world's plastic
garbage is mismanaged, and nations like China, India, and Indonesia suffer from
According to an Earth Action
analysis, about 98.6% of the plastic garbage generated in India is mismanaged.
Under current high production
plastic pollution might quadruple by 2040 despite increased recycling