A recent study by Wageningen University & Research (WUR), Netherlands, analysed the fate of compostable packaging products in a full- scale industrial organic waste treatment facility. The results show that the tested EN13432 certified products break down within a maximum of 22 days. The project was commissioned by the Dutch Ministry of Economic Affairs and Climate Policy (EZK). “The study shows that the tested objects have the same disintegration and degradation rate as regular biowaste or are even faster. We need more research of this kind, conducted by independent and renowned institutions”, says EUBP Chairman of European Bioplastics (EUBP), François de Bie.
Central aim of the study was to gather more empiric data on the question whether the disintegration rate of compostable products is sufficient to be compatible with the current organic waste treatment practices. In an industrial organic waste treatment trial, a set of nine different compostable plastic products, consisting of organic waste collection bags, plant pots, tea bags, coffee pads, coffee capsules, and fruit labels were tested. “We studied how compostable plastics behave in the current Dutch system for the treatment of GFT (i.e source separated municipal biowaste) and came to the conclusion that compostable products can be processed well with GFT“, says Maarten van der Zee, co-author of the study.
After the first waste treatment cycle of only 11 days, the PLA plant pot already completely disintegrated. “This is significantly faster than paper and most organic matter. Even the orange peel and banana skin (the reference materials) did not completely disintegrate and needed more time” de Bie commented on the study. “The PLA tea bag, which is a typical consumer product, also successfully disintegrated within 22 days.”
The study also analysed the composition of the current visual contamination of conventional plastics in compost, and no compostable plastics were identified amongst the plastics that were found in the compost. “The importance of this result cannot be overstated”, de Bie stresses. “All stakeholders involved in the business of organic recycling, be it waste managers, industry, or legislators, now have the proof that certified compostable plastics actually deliver.”
Read the complete study here: https://bit.ly/2HHAXhn
Students and alumni of the Federal University of Rio de Janeiro (UFRJ) have designed and produced a biodegradable plastic packaging that reveals the quality of the food. The product, called Plasticor, changes its color when the content is not suitable for consumption. Developed about a year ago, in the Xerém campus labs, the student-developed bioplastic is a sustainable option to avoid food waste.
Every year, of all food produced on the planet, 30 % (or 1.3 billion tons) goes to trash, according to the United Nations. The color change would be a way of better managing food consumption, by giving preference to those whose expiration is closer, plus ensuring the reliability of expired foods that can still be consumed safely.
“The environmental impact is also reduced since the use of plastic materials has been abundant in the food industry in the last decades. Our packaging is ecofriendly because it doesn’t use chemical additives and doesn’t take years to degrade”, explains João Vítor Balbino, a Biophysics student and one of the seven members of the startup. Whilecommon plastics can take up to five centuries to degrade, students estimate that Plasticor degrades in six months.
The team is multidisciplinary and involves undergraduate students from Biotechnology, Nanotechnology, Biophysics and Marketing courses, a doctoral student of Polymer Science and Technology, and a designer, all from UFRJ. The project is funded by its own creators, who are seeking possible investors. Those interested in helping can participate in the collective financing created by the team, contributing with any amount above R$ 10.
To do this, go to https://www.kickante.com.br/campanhas/bioplastico-que-muda-cor-alunxs-ufrjdc.
Researchers at ETH Zurich and the Swiss Federal Institute of Aquatic Science and Technology (Eawag) succeeded in an interdisciplinary study to demonstrate that soil microorganisms metabolically utilised the carbon in the PBAT polymer both for energy production and also to build up microbial biomass. The researchers used the biodegradable polymer PBAT (Polybutylenadipatterephthalat) labelled with a carbon isotope. This isotope label enabled the scientists to track the polymer-derived carbon along different biodegradation pathways in soil. It showed that the carbon from PBAT was not only converted into carbon dioxide (CO2) as a result of microbial respiration but also incorporated into the biomass of microorganisms colonizing the polymer surface. The researchers are the first to successfully demonstrate where the carbon of a polymer ends up and that a plastic material is effectively biodegrading in soils.“This clarifies that nothings remains after biodegradation besides water, CO2 and biomass,“ says Hasso von Pogrell, Managing Director of European Bioplastics e.V.. “With this study, two concerns that are constantly being raised about biodegradable plastics have been rebutted – the doubt that microorganisms fully metabolize certified biodegradable plastics and the concern that the oil-based part of the polymer will not biodegrade completely.“
The tested PBAT polymer is a fossil-based, biodegradable polymer, which is used amongst others for the production of biodegradable, certified compostable bio-waste bags (according to EN 13432) or biodegradable in soil certified mulch films (according to EN 17033).
“The results of this study will surely enable municipalities and waste managers across EU Member States to acknowledge the benefits and the functionality of certified compostable plastic bio-waste bags for a separate collection of organic waste as well as in an agricultural context the alternative of soil biodegradable mulch films,“ von Pogrell concluded.
