Bean dregs into reusable bags instead of plastic! Automatic degradation alleviates white pollution within one month

- Dec 06, 2019-

Recently, according to foreign media reports, professor William chan of nanyang technological university in Singapore has developed a biodegradable food packaging.

The packaging is made of cellulose, which is extracted from waste products made from soy products.


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Soybeans are ground up and used to make tofu and soy milk, and the residue is usually thrown away, William said.

If the residue is fermented, the cellulose can be left behind and packaged in plastic as microorganisms devour its nutrients.


Currently, most cellulosic plastic packaging on the market is made from wood and corn.

But the wood and corn, grown for plastic packaging, take up a lot of land.


By contrast, bags made of tofu extract are more environmentally friendly, and professor Williams's invention solves both problems by reducing plastic waste and food waste.

In addition to the tofu residue, William discovered that the cellulose in the durian's shell can also be made into a plastic film.


Professor William chan said: "my dream is for Singapore to become an innovation hub where neighbouring countries can see the benefits of our low-cost innovations.

Once they see the benefits of this new invention, I hope the neighboring countries will adopt it, so that we can achieve a win-win situation."


In Singapore, the amount of food waste generated each year could fill 15,000 olympic-size swimming pools.


However, there have also been concerns that some bioplastic takes a long time to break down at temperatures in excess of 50 ° c.

If bioplastics are not disposed of, they could exacerbate the plastic pollution problem.


In response, Williams says his plastic soy packaging can degrade itself within a month without heating.


More than half a million hermit crabs have died trapped in plastic on two remote islands, sparking concern.

A pioneering study has found that 508,000 crabs have died in the cocos islands in the Indian Ocean.

Sixty-one thousand crabs died on Henderson island in the south Pacific.

Previous studies have found high levels of plastic pollution in both places.


Researchers from the Marine and Antarctic research institute at the university of Tasmania in Australia, the natural history museum in London and the community science organisation two hands project found that one to two crabs die from plastic debris on every square metre of beach.


They reportedly surveyed four locations on cocos island and Henderson island, looking for plastic containers that could trap crabs, and calculated the number of trapped crabs in each container.

They then extrapolated their findings to 15 other islands in the cocos archipelago.


Because hermit crabs often use the smell of recently dead crabs to find new shells, multiple crabs can be trapped in the same spot.

Once, researchers found 526 crabs trapped in the same plastic container.


"It's a really big problem because it only takes one crab," said James Bond, senior curator at the natural history museum and one of the researchers on the report.

"Hermit crabs don't have their own shells, which means that when one of their kin dies, it sends a chemical signal that there's a shell here, attracting more crabs...

It's a terrible chain reaction in nature."


Hermit crabs are an important part of the tropical environment because they can spread seeds, ventilate the soil and fertilize the soil, so their decline has a major impact on the surrounding ecosystem.


The extent of plastic's damage to land is underestimated, says bond. "in the ocean, plastic gets tangled up and eaten by wildlife;

On land, it's like a trap, as we see it, but it can also be a physical barrier that prevents species from moving across the ground."


"These results are striking, but perhaps not surprising, as the vegetation on and around the beach is a frequent haunt for a wide variety of wildlife," said researcher ravers, who led the study.

"These organisms will inevitably interact with and be affected by plastic pollution, although our study is one of the first to provide quantitative data on such effects."