sustainability

Adding enzymes to bioplastics can make them disappear

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via Popular Science

With so many different plastics entering the waterways that take hundreds of years to decompose, plastic pollution and microplastics are almost everywhere on the planet, from the air to the sea, in vast quantities. Compostable plastics, like corn-based plastic cups and straws, are sometimes touted as a viable solution, but without the infrastructure to properly turn them into compost, they can end up in a landfill. 

To keep our oceans from becoming even more plastic-filled, scientists are finding the keys to making plastics quickly decompose, and baking them into the plastic’s formula. Ting Xu, professor of materials science and engineering and chemistry at the University of California Berkeley, and her research group investigate biologically available solutions that will allow single-use plastic to biodegrade under easily attainable conditions. In a new study, they describe how they used an innovative polymer coating on enzymes that can be built-in to bioplastics to make them easier to compost at home. 

Read the full story here: https://www.popsci.com/story/environment/biodegradable-plastics-enzyme/

The Future Looks Bright for Infinitely Recyclable Plastic

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via Berkeley Lab

Plastics are a part of nearly every product we use on a daily basis. The average person in the U.S. generates about 100 kg of plastic waste per year, most of which goes straight to a landfill. A team led by Corinne Scown, Brett Helms, Jay Keasling, and Kristin Persson at Lawrence Berkeley National Laboratory (Berkeley Lab) set out to change that.

Less than two years ago, Helms announced the invention of a new plastic that could tackle the waste crisis head on. Called poly(diketoenamine), or PDK, the material has all the convenient properties of traditional plastics while avoiding the environmental pitfalls, because unlike traditional plastics, PDKs can be recycled indefinitely with no loss in quality.

Read the full story here: https://newscenter.lbl.gov/2021/04/22/infinitely-recyclable-plastic/

Could Plastic-Eating Mushrooms Solve Humanity’s Plastic Problem?

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via Interesting Engineering

Since the mass production of plastics began in the 1950s, humans have created 9 billion tons of plastic, and this creates a crisis that’s not easy to tackle since plastic takes more than 400 years to degrade. Those used by the people of the ’60s still exist in some form, and with only 9 percent recycled, only 12 percent has been incinerated.

This has lead scientists to search for alternative methods for plastic reduction, and one solution that could aid humanity might be hidden in fungi. Scientists have discovered mushrooms that eat plastic over the years: Some mushroom species have the ability to consume polyurethane, which is one of the main ingredients in plastic products.

Read the full story here: https://interestingengineering.com/could-plastic-eating-mushrooms-solve-humanitys-plastic-problem

British Company That Uses Waste Plastic To Pave Roads Bringing Process To U.S.

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via Forbes

British manufacturer MacRebur has already helped paved thousands of miles of roads in the U.K. with asphalt that contains waste plastic, says CEO Toby McCartney. The company is setting up shop in Florida and has its eye on millions of tons of wasted plastic in the United States.

The company says its process of turning waste plastic into an asphalt additive can help keep plastic out of landfills and incinerators and create stronger streets, all at reduced costs.

Read the full story here: https://www.forbes.com/sites/jeffkart/2021/02/03/british-company-that-uses-waste-plastic-to-pave-roads-bringing-process-to-us/?sh=4b9fee9d313d

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    California Company Hopes To Pave The World’s Roads With Recycled Plastic

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    via DOGO News

    The invention of plastic has been a double-edged sword for humanity. While the cheap, versatile material has made life convenient, it is virtually indestructible and takes centuries to decompose. Since avoiding plastic is impossible, companies worldwide are coming up with innovative ways to repurpose the millions of tons of polymer waste that end up in our landfills annually. Among the latest is California-based TechniSoil Industrial, which has devised an ingenious way to reuse plastic waste to repave roads.

    Road resurfacing is an expensive undertaking that starts with using special equipment to extract and grind the topmost 3-to-6 inches of asphalt. Since the recycled material is not strong enough to use on its own, half of it is discarded and replaced with fresh hot asphalt. The combined product is mixed with bitumen — a sludge-like petroleum residue that acts as a binding agent — and relaid on the surface. Repaving a single lane mile requires 42 truckloads of new material and hauling out a similar amount of unusable waste.

    Read the full story here: https://www.dogonews.com/2021/1/29/california-company-hopes-to-pave-the-worlds-roads-with-recycled-plastic

    Single-use plastic bag ban begins in Delaware

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    via Delaware State News

    DOVER — Customers in the checkout lines at grocery, retail and convenience stores throughout Delaware should be prepared for a new way of conducting business starting New Year’s Day.

    That’s because consumers and some businesses in Delaware will no longer be able to use or distribute single-use plastic carryout bags at the point of sale.

    Read the full story here: https://delawarestatenews.net/news/single-use-plastic-bag-ban-begins-in-delaware/

    Research Turns Plastic Waste into Biodegradable Silk

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    via Plastics Today

    Solutions to big problems can spring from little things. In research at Rensselaer Polytechnic Institute in Troy, NY, a microorganism that digests common petroleum-based plastic waste and yields a biodegradable plastic alternative represents a new solution to an on-going problem.

    With the support of a substantial new National Science Foundation grant of $500,000 for the project, a team of engineers from Rensselaer Polytechnic Institute will explore this potentially transformative idea entitled Microbial Upcycling of Petrochemical Polymer Waste into High Value Protein-Based Polymers for a Circular Economy.

    Read the full story here: https://www.plasticstoday.com/materials-research/research-turns-plastic-waste-biodegradable-silk

    New enzyme cocktail digests plastic waste ‘six times faster’

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    via Circular

    The scientists who re-engineered the plastic-eating enzyme PETase have now created an enzyme ‘cocktail’ which can digest plastic up to six times faster.

    A second enzyme, found in the same waste dwelling bacterium that lives on a diet of plastic bottles, has been combined with PETase to speed up the breakdown of plastic.

    Read the full story here: https://www.circularonline.co.uk/news/new-enzyme-cocktail-digests-plastic-waste-six-times-faster/

    National Science Foundation Awards Grant to Rensselaer Polytechnic for Research into New Plastic

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    via Plastics Today

    With the support of a $300,000 grant from the National Science Foundation, chemical engineers from Rensselaer Polytechnic Institute in Troy, NY, aim to develop a new polymer that can replace polystyrene (PS). While PS is inexpensive and easy to make, it is difficult to break down into its original components for re-use through a process called depolymerization. Founded in 1824, Rensselaer is America’s first technological research university.

    Read the full story here: https://www.plasticstoday.com/materials/national-science-foundation-awards-grant-rensselaer-polytechnic-research-new-plastic/21414866763275

    Polystyrene ball-stick model with 11 countable monomers. PakpongICCH444 / CC BY-SA (https://creativecommons.org/licenses/by-sa/4.0)

    COVID-19 Lays Waste to Many US Recycling Programs

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    via Manufacturing Business Technology

    Many items designated as reusable, communal or secondhand have been temporarily barred to minimize person-to-person exposure. This is producing higher volumes of waste.

    Grocers, whether by state decree or on their own, have brought back single-use plastic bags. Even IKEA has suspended use of its signature yellow reusable in-store bags. Plastic industry lobbyists have also pushed to eliminate plastic bag bans altogether, claiming that reusable bags pose a public health risk.

    Read the full story here: https://www.mbtmag.com/home/news/21138099/covid19-lays-waste-to-many-us-recycling-programs