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Shrimp farm bacteria found to munch on plastic waste

Shukri ZNA, Yatim NI, Hossain S, Chik CENCE, Endut A

Phytoremediation

The same microbial ingenuity that breaks down leaf litter in your compost pile is turning up in an unexpected place, shrimp farm sludge, offering a glimpse of how nature might one day help clear plastic out of soil and waterways.

Researchers went digging through the gunk at the bottom of a shrimp farming tank and found a bacteria that normally helps clump particles together, but it turns out this microbe has a hidden talent: it can slowly eat plastic. Over about seven weeks, it chewed through a measurable chunk of three common plastic types, leaving behind visible pits and chemical changes in the material. It's early days, but it points to microbes as a potential tool against the mountains of plastic piling up in the environment.

Key Findings

1

Isolated bacterium Microbacterium aurantiacum from shrimp aquaculture biofloc showed 95% flocculation efficiency in a kaolin test

2

After 50 days of incubation, the bacterium degraded 9.2% of polypropylene, 8.9% of polyethylene, and 8.8% of polystyrene by weight

3

Spectroscopy confirmed structural and chemical changes in the plastics, and agar plate tests showed clear zones indicating plastic-degrading extracellular enzymes

chevron_right Technical Summary

Scientists discovered a bacteria living in shrimp farm wastewater that can break down plastic. This strain of Microbacterium aurantiacum ate away up to 9% of common plastics like polypropylene, polyethylene, and polystyrene in just 50 days, hinting at a cheap, natural way to tackle plastic pollution.

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Abstract Preview

Original paper

Characterisation and degradation of microplastic by Microbacterium aurantiacum isolated from biofloc in white shrimp aquaculture closed system.

This study pioneers the investigation of a novel bacteria isolated from the biofloc of a recirculating aquaculture system (RAS) for its role as a microplastic degrader. A targeted bioflocculant-pro...

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Abstract copyright held by the original publisher.

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