As the world's need for plastic increases, scientists are developing biodegradable alternatives. Photo: Avani Middle East
As the world's need for plastic increases, scientists are developing biodegradable alternatives. Photo: Avani Middle East
As the world's need for plastic increases, scientists are developing biodegradable alternatives. Photo: Avani Middle East
As the world's need for plastic increases, scientists are developing biodegradable alternatives. Photo: Avani Middle East

Is biodegradable packaging really the answer to the world's plastic addiction?


Daniel Bardsley
  • English
  • Arabic

The modern world’s addiction to plastic shows no sign of ending, with forecasts indicating that demand for the material is likely to rise steeply in the coming decades.

As a result, efforts to design and produce less harmful alternatives have ramped up.

Cutlery, bottles and plates can now be made out of plant material, and some even degrade into fish food.

But can they replace the need for traditional plastic?

Is biodegradable the answer?

Given the problems created by conventional plastics, mostly generated from fossil fuels, is the answer to be found in biodegradable alternatives?

Starch, cellulose (plant fibres), biologically derived polymers and proteins are the starting points for various biodegradable plastics, including packaging materials. Some biodegradable plastics are compostable, meaning that they turn into a nutrient-rich substance.

There’s a perception if it says biodegradable it will rot down. That’s not the case at all
Phil Purnell,
University of Leeds

“There are many types of compostable plastics,” said Dr Teresa Domenech, associate professor in industrial ecology and the circular economy at University College London.

“The most common ones are polylactic acid derived. The feedstock is starchy products such as sugar cane, corn starch … but they can be derived from a variety of biomaterials, including agricultural waste.”

Researchers are investigating potential new materials, as evidenced by a study published in June by scientists at the Dubai campus of the Indian university Bits Pilani.

The scientists found that a composite of starch, cellulose, chitin (which can be obtained from fungi, for example) and date seed extracts could be useful as a food packaging film.

Starch is widely available from plants including wheat, corn and potatoes but, on its own, tends not to prevent the growth of microorganisms that cause food to spoil.

With the date seeds extract included, the film was better able to protect the fruit from deteriorating.

“Addition of extracts from date seeds to the prepared composite film imparted antioxidant and antimicrobial properties, which when used for fruit wrapping suggested that the freshness of the fruit was retained for a much longer period,” the researchers wrote in Food Bioscience.

When conditions are optimal, the film degraded in composting soil in five to seven weeks.

In another example, scientists in China recently found that a mix of cellulose nanofibres and part of the sweetcorn stalk called the corn straw core was a potential food packaging material because it resisted ultraviolet light and was not water vapour permeable.

The researchers’ paper in the journal Food Hydrocolloids described corn straw cores as “by far the most readily available” type of crop waste.

Breaking down the truth

While such results may appear to suggest that biodegradable packaging could be the answer to society’s plastic problem, “there are all sorts of caveats”, according to Prof Phil Purnell, a professor of materials and structures at the University of Leeds in the UK.

Key among them is that materials that are compostable typically break down under a specific set of circumstances.

“There’s a perception if it says biodegradable it will rot down. That’s not the case at all,” Prof Purnell said.

Prof Phil Purnell, from the University of Leeds in the UK, said certain conditions often have to be met for biodegradation to work fully. Photo: University of Leeds
Prof Phil Purnell, from the University of Leeds in the UK, said certain conditions often have to be met for biodegradation to work fully. Photo: University of Leeds

“If you bury them in the garden, after a year they will still be there.”

According to a 2020 Greenpeace East Asia report, Biodegradable Plastics: Breaking Down the Facts, 83 per cent of biodegradable plastic used for packaging is “industrially compostable”.

This means that for it to turn into compost, it must be processed in particular conditions, with humidity carefully managed and temperatures above 50°C.

If compostable material is put into a regular compost bin or thrown on the ground, it will probably not degrade because conditions will not be hot enough.

Another issue with biodegradable plastic, such as packaging, is that it can contaminate recycling streams for regular plastic waste.

As a result, biodegradable plastic needs to be kept separate from non-biodegradable plastic, which is not easily done.

“At the moment we have to be cautious in terms of replacing conventional plastic packaging with compostable materials because there’s not a clear route for the end of life of these plastics,” Dr Domenech said.

“They are perceived by the public as low carbon or low impact, but they don’t necessarily have to be low carbon or low impact.”

Are we better off sticking to regular plastic?

Indeed, at the moment it may be more straightforward to process conventional plastic than biodegradable plastic.

“Packaging materials like PET [Polyethylene terephthalate] are basically recyclable through plastic mechanical recycling and there are already structures. In some cases, these have a clear route and there is a closed loop,” Dr Domenech said.

A closed loop means that the plastic can be turned into another product of the same type, rather than something different.

There is also concern that biodegradable plastics may encourage consumers to continue to buy products wrapped in single-use plastics because there is a perception that the environmental impact is reduced. It is a concern for the environmental organisation Greenpeace.

“Our position is clear on this: We consider these technologies false solutions that do not stop the plastic crisis. There is no way to throw away, the solution is to reduce and reuse,” said Dania Cherry, of Greenpeace Mena.

______________________________________

Indonesia's plastic museum: in pictures

  • People walk through 'Terowongan 4444' or 4444 tunnel, made with plastic bottles collected from several rivers around the city over three years, at the museum built by Indonesia's environmental activist group Ecological Observation and Wetlands Conservation (Ecoton), in Gresik regency, near Surabaya in East Java province. All photos: Reuters
    People walk through 'Terowongan 4444' or 4444 tunnel, made with plastic bottles collected from several rivers around the city over three years, at the museum built by Indonesia's environmental activist group Ecological Observation and Wetlands Conservation (Ecoton), in Gresik regency, near Surabaya in East Java province. All photos: Reuters
  • A placard reads 'Brantas river polluted with microplastic' among plastic bags displayed at the plastic museum built by Indonesia's environmental activist group Ecoton.
    A placard reads 'Brantas river polluted with microplastic' among plastic bags displayed at the plastic museum built by Indonesia's environmental activist group Ecoton.
  • Ecoton volunteers built a mock-up of the Goddess Sri, the goddess of rice and prosperity for Javanese people, from plastic waste collected from several rivers around the city, at the plastic museum in Gresik regency near Surabaya.
    Ecoton volunteers built a mock-up of the Goddess Sri, the goddess of rice and prosperity for Javanese people, from plastic waste collected from several rivers around the city, at the plastic museum in Gresik regency near Surabaya.
  • Volunteers examine the contents of microplastics found in a river water sample. at the laboratory owned by Indonesia's environmental activist group Ecoton.
    Volunteers examine the contents of microplastics found in a river water sample. at the laboratory owned by Indonesia's environmental activist group Ecoton.
  • Microplastic contents are seen on a screen at the laboratorium owned by Indonesia's Ecoton environmental activist group in East Java province.
    Microplastic contents are seen on a screen at the laboratorium owned by Indonesia's Ecoton environmental activist group in East Java province.
  • People take selfies in '4444 tunnel' at Ecoton's plastic museum.
    People take selfies in '4444 tunnel' at Ecoton's plastic museum.
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UPI facts

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Muslim Council of Elders condemns terrorism on religious sites

The Muslim Council of Elders has strongly condemned the criminal attacks on religious sites in Britain.

It firmly rejected “acts of terrorism, which constitute a flagrant violation of the sanctity of houses of worship”.

“Attacking places of worship is a form of terrorism and extremism that threatens peace and stability within societies,” it said.

The council also warned against the rise of hate speech, racism, extremism and Islamophobia. It urged the international community to join efforts to promote tolerance and peaceful coexistence.

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The dominant group of refugees in Poland are citizens of Ukraine, but among the people checked by the Border Guard are also citizens of the USA, Nigeria, India, Georgia and other countries.

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No person who has received refuge in Poland will be sent back to a country torn by war.

Jewel of the Expo 2020

252 projectors installed on Al Wasl dome

13.6km of steel used in the structure that makes it equal in length to 16 Burj Khalifas

550 tonnes of moulded steel were raised last year to cap the dome

724,000 cubic metres is the space it encloses

Stands taller than the leaning tower of Pisa

Steel trellis dome is one of the largest single structures on site

The size of 16 tennis courts and weighs as much as 500 elephants

Al Wasl means connection in Arabic

World’s largest 360-degree projection surface

Jetour T1 specs

Engine: 2-litre turbocharged

Power: 254hp

Torque: 390Nm

Price: From Dh126,000

Available: Now

TOURNAMENT INFO

2018 ICC World Twenty20 Asian Western Regional Qualifier
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Thursday results
UAE beat Kuwait by 86 runs
Qatar beat Bahrain by five wickets
Saudi Arabia beat Maldives by 35 runs

Friday fixtures
10am, third-place playoff – Saudi Arabia v Kuwait
3pm, final – UAE v Qatar

Specs

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Sharad Nair recommends three investment apps for UAE residents:

  • For beginners or people who want to start investing with limited capital, Mr Nair suggests eToro. “The low fees and low minimum balance requirements make the platform more accessible,” he says. “The user interface is straightforward to understand and operate, while its social element may help ease beginners into the idea of investing money by looking to a virtual community.”
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A $10 hand-powered LED light and battery bank

Device is operated by hand cranking it at any time during the day or night 

The charge is stored inside a battery

The ratio is that for every minute you crank, it provides 10 minutes light on the brightest mode

A full hand wound charge is of 16.5minutes 

This gives 1.1 hours of light on high mode or 2.5 hours of light on low mode

When more light is needed, it can be recharged by winding again

The larger version costs between $18-20 and generates more than 15 hours of light with a 45-minute charge

No limit on how many times you can charge

 

The biog

Nickname: Mama Nadia to children, staff and parents

Education: Bachelors degree in English Literature with Social work from UAE University

As a child: Kept sweets on the window sill for workers, set aside money to pay for education of needy families

Holidays: Spends most of her days off at Senses often with her family who describe the centre as part of their life too

UAE's final round of matches
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  • Sep 6, 2016 Lost to Australia 1-0 (home)
  • Oct 6, 2016 Beat Thailand 3-1 (home)
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  • Nov 15, 2016 Beat Iraq 2-0 (home)
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  • Sep 5, 2017 v Iraq (away)
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2pm – Andreah

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4.30pm – The Boxtones

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Key facilities
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THE BIO

Favourite author - Paulo Coelho 

Favourite holiday destination - Cuba 

New York Times or Jordan Times? NYT is a school and JT was my practice field

Role model - My Grandfather 

Dream interviewee - Che Guevara

Our family matters legal consultant

Name: Hassan Mohsen Elhais

Position: legal consultant with Al Rowaad Advocates and Legal Consultants.

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CDU: "Now is the time to control the German borders and enforce strict border rejections" 

SPD: "Border closures and blanket rejections at internal borders contradict the spirit of a common area of freedom" 

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Four stars

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The Hindu festival is at once a celebration of the autumn harvest and the triumph of good over evil, as outlined in the Ramayana.

According to the Sanskrit epic, penned by the sage Valmiki, Diwali marks the time that the exiled king Rama – a mortal with superhuman powers – returned home to the city of Ayodhya with his wife Sita and brother Lakshman, after vanquishing the 10-headed demon Ravana and conquering his kingdom of Lanka. The people of Ayodhya are believed to have lit thousands of earthen lamps to illuminate the city and to guide the royal family home.

In its current iteration, Diwali is celebrated with a puja to welcome the goodness of prosperity Lakshmi (an incarnation of Sita) into the home, which is decorated with diyas (oil lamps) or fairy lights and rangoli designs with coloured powder. Fireworks light up the sky in some parts of the word, and sweetmeats are made (or bought) by most households. It is customary to get new clothes stitched, and visit friends and family to exchange gifts and greetings.  

 

Veere di Wedding
Dir: Shashanka Ghosh
Starring: Kareena Kapoo-Khan, Sonam Kapoor, Swara Bhaskar and Shikha Talsania ​​​​​​​
Verdict: 4 Stars

Company Fact Box

Company name/date started: Abwaab Technologies / September 2019

Founders: Hamdi Tabbaa, co-founder and CEO. Hussein Alsarabi, co-founder and CTO

Based: Amman, Jordan

Sector: Education Technology

Size (employees/revenue): Total team size: 65. Full-time employees: 25. Revenue undisclosed

Stage: early-stage startup 

Investors: Adam Tech Ventures, Endure Capital, Equitrust, the World Bank-backed Innovative Startups SMEs Fund, a London investment fund, a number of former and current executives from Uber and Netflix, among others.

MATCH INFO

Day 2 at Mount Maunganui

England 353

Stokes 91, Denly 74, Southee 4-88

New Zealand 144-4

Williamson 51, S Curran 2-28

Updated: July 24, 2023, 6:27 AM