Bacteria from a Trash Heap Turn Plastic Into Less
Two New Strains Found in an Indian Landfill Could Revolutionize Plastic Degradation
In a groundbreaking discovery, researchers have identified two strains of bacteria—KRS102 and KRS236—capable of breaking down polypropylene, one of the world’s most persistent plastics.
Discovery & Verification
The bacteria were isolated from a landfill in Rishikesh, India, and identified through DNA analysis. Initial tests confirmed they could produce biosurfactants—compounds that help microbes adhere to surfaces—and thrive in moist environments, essential traits for plastic degradation.
Plastic Degradation Breakthrough
Over 90 days, the team cultivated the bacteria on UV-treated polypropylene sheets. The results were striking:
- KRS102 degraded 3.4% of the plastic.
- KRS236 degraded 2.9%.
KRS102 outperformed its counterpart due to higher bacterial protein production and a faster plastic chain-breaking mechanism. Mathematical modeling estimated KRS102’s half-life at 1,805 days—shorter than KRS236’s—meaning it accelerates plastic breakdown more efficiently.
Scientific Proof of Degradation
Advanced testing confirmed the bacteria’s impact:
- Elemental analysis revealed oxygen increase and carbon reduction in treated plastic, proving oxidation.
- Infrared spectroscopy detected changes in chemical bonds, indicating bacterial enzyme activity.
- Scanning electron microscopy and gas chromatography exposed surface damage and new chemical fragments, validating plastic breakdown.
A Sustainable Solution for Plastic Pollution?
With KRS102 proving more effective, these bacteria could offer an eco-friendly method to tackle polypropylene waste, a major environmental challenge. Further research may unlock even greater potential.
