The phenomenology of bed defluidization during the pyrolysis of a food-packaging plastic waste

2001 ◽  
Vol 120 (1-2) ◽  
pp. 127-133 ◽  
Author(s):  
Umberto Arena ◽  
Maria Laura Mastellone
Keyword(s):  
Agronomy ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 134
Author(s):  
Teresa Batista ◽  
Isabel Pestana da Paixão Cansado ◽  
Barbara Tita ◽  
Ana Ilhéu ◽  
Luis Metrogos ◽  
...  

The increase in agricultural production and food quality has forced the growing use of plastics in various activities. The plastic wastes are partially recycled in or outside Portugal; nevertheless, the contaminated wastes are sent to landfill. It is crucial to consider new models for their valorization at a regional level and from a circular economy perspective. In the scope of the Placarvões project, a study was elaborated, which included the types and quantities of plastics used in the irrigation area of the Alqueva Dam, in southern Portugal. The crops that use the most plastic are intensive olive groves, almonds, and table grapes, which represent more than 91% of total plastic waste. The production of activated carbons (ACs) is a solution to avoid plastics landfill. ACs were produced from plastic used on food packaging (PB-Samples) and sheeting film (PS-Samples) by activation with K2CO3. ACs presented well-developed textural properties (PB-K2CO3-1:1–700 and PS-K2CO3-1:1–700 exhibited a volume of 0.32 and 0.25 cm3 g−1 and an apparent surface area of 723 and 623 m2 g−1, respectively). Both ACs performed very well concerning four pesticide removals from the liquid phase. This solution is very promising, such these ACs could be applied in effluent treatments on a large scale.


The use of plastic materials as food packaging materials has caused environmental problems, namely the accumulation of plastic waste. The presence of innovation in making food packaging with organic materials in the form of edible films can minimize plastic waste because organic materials can be degraded by decomposing microbes in a relatively short time. This review examines the production and characteristics of composite edible films based on polysaccharides and proteins. Several characteristics of the material that this film must meet, such as resistance to water and evaporation, are the standards that must be met for edible films. Starch-based materials are still too brittle to be the base material for making films because the hydrophilic nature of starch makes it easy to dissolve in water. The functional properties of starch need to be improved, including mixing it with other ingredients such as proteins, plasticizers, and essential oils in formulations. The mixing of these ingredients can form a formulation that forms an edible film with characteristics suitable for various food products.


2019 ◽  
Vol 11 (12-SPECIAL ISSUE) ◽  
pp. 646-657
Author(s):  
S. Alias ◽  
M.A. Azizan ◽  
N.S. Mohd-Nazry ◽  
C.C. Tay ◽  
N.H. Abd-Aziz ◽  
...  

2021 ◽  
Vol 6 (1) ◽  
pp. 31-37
Author(s):  
Sucika Armiani ◽  
Siti Rabiatul Fajri ◽  
Masiah Masiah ◽  
Baiq Muli Harisanti ◽  
Baiq Yuli Pidiawati

Tujuan kegiatan masyarakat ini ialah memberi pelatihan keterampilan kepada masyarakat untuk mengolah sampah plastik menjadi produk yang bernilai ekonomis agar meningkatkan nilai sampah plastik dimasyarakat, terutama kepada Mitra pengabdian Kelompok Muslimah Kreatif Bayan. Pelaksanaan kegiatan dilaksanakan selama 2 minggu meliputi persiapan awal kegiatan, yakni analisis situasi dan analisis kebutuhan. Kegiatan di lapangan dilakukan dengan metode sosialisasi dan pelatihan praktek langsung serta pendampingan pengelolaan sampah plastik menjadi barang kerajinan yang bernilai ekonomis. Kegiatan-kegiatan ini mencakup teori dan praktek yang meliputi: (1) Sosialisasi; (2) Pengenalan produk; dan (3) Pembuatan produk (praktek langsung). Keberhasilan kegiatan ini terukur dari terciptanya keterampilan peserta dalam mengolah sampah disertai hasil keterampilan dalam olah kreasi sampah kresek dan sedotan plastik menjadi bunga artificial, beberapa kebutuhan rumah tangga seperti celemek, taplak meja, penutup kulkas, topi dan lukisan wajah yang terbuat dari plastik kemasan makanan dan minuman. Empowering Community Skills Through Plastic Waste Processing in Anyar Village, Bayan District Abstract The purpose of this community activity is to provide skills training to the community to process plastic waste into products that have economic value in order to increase the value of plastic waste in the community, especially to the service partners of the Bayan Creative Muslimah Group. The implementation of the activities was carried out for 2 weeks including the initial preparation of activities, namely situation analysis and needs analysis. Activities in the field are carried out using socialization methods and direct practical training as well as assistance in managing plastic waste into handicrafts that have economic value. These activities cover theory and practice which include: (1) Socialization; (2) Product introduction; and (3) Product manufacture (hands-on practice). The success of this activity is measured by the creation of participants' skills in processing waste along with the results of skills in processing the creation of crackle and plastic straws into artificial flowers, some household necessities such as aprons, tablecloths, refrigerator covers, hats and face paintings made of plastic food packaging and straws.


2021 ◽  
Vol 11 (21) ◽  
pp. 9862
Author(s):  
Pietro A. Vaccaro ◽  
Adela P. Galvín ◽  
Jesús Ayuso ◽  
Auxi Barbudo ◽  
Antonio López-Uceda

For many decades, researchers have been working on finding innovative and sustainable solutions to address the enormous quantities of plastic waste that are produced every year which, after being collected, are transformed into energy, recycled, or sent to landfills. Giving a second life to plastic waste as a material to be incorporated, in the form of macro-fibres, into concrete, could be one such solution. The purpose of this study was to analyse the mechanical and physical behaviour of the hardened concrete reinforced with macro plastic fibres (RPFs) obtained from food packaging waste (FPW) discarded during the packaging phase. By varying the quantity of macro-fibres used, physical and mechanical properties such as compressive strength, modulus of elasticity, flexural strength, and toughness were evaluated. It was observed that, although the presence of macro plastic fibres reduced the mechanical resistance capacity compared to that of traditional concrete, their contribution proved to be of some importance in terms of toughness, bringing an improvement in the post-crack resistance of the composite material. This innovative mixture provides a further impulse to the circular economy.


Author(s):  
Wolfgang Zimmermann

The global production of plastics made from non-renewable fossil feedstocks has grown more than 20-fold since 1964. While more than eight billion tons of plastics have been produced until today, only a small fraction is currently collected for recycling and large amounts of plastic waste are ending up in landfills and in the oceans. Pollution caused by accumulating plastic waste in the environment has become worldwide a serious problem. Synthetic polyesters such as polyethylene terephthalate (PET) have widespread use in food packaging materials, beverage bottles, coatings and fibres. Recently, it has been shown that post-consumer PET can be hydrolysed by microbial enzymes at mild reaction conditions in aqueous media. In a circular plastics economy, the resulting monomers can be recovered and re-used to manufacture PET products or other chemicals without depleting fossil feedstocks and damaging the environment. The enzymatic degradation of post-consumer plastics thereby represents an innovative, environmentally benign and sustainable alternative to conventional recycling processes. By the construction of powerful biocatalysts employing protein engineering techniques, a biocatalytic recycling of PET can be further developed towards industrial applications. This article is part of a discussion meeting issue ‘Science to enable the circular economy’.


2020 ◽  
Vol 13 (1) ◽  
pp. 46-52
Author(s):  
Ferdinanda Ferdinanda ◽  
Elianna Gerda Pertiwi

Plastic is one material that is often used by humans for various things, such as bags of groceries to food packaging. Plastic is a popular material used in common be- cause it is considered practical. On the other side, plastic also harms the environment if it is not used, because of the nature of the plastic that is difficult to decompose even though it has buried for decades. The increase in plastic waste that sourcing from daily activity needs to address immediately; one of them is through socialization and exposure to the public on the importance of reducing plastic waste. Public Service Announcements (PSA) are quite useful in informing an appeal to the public because they place more emphasis on the public interest that seeks to in-still awareness about the social issues in circulation. PSA can implement through information media such as newspapers, radio, posters to multimedia such as audio-visual media, which are increasingly popular these days due to the rapid development of Information and Communication Technology (ICT). In designing PSA, one of the stages that needs to be done is the creation of storyboards in the pre-production stage. The storyboard contains technical indicators such as picture descriptions, cameras, lighting and supporting properties visualized in the sketch. The suitability and the smooth production of advertisements or cinema are very dependent on the preproduction stage, one of which is the creation of storyboards.  


Recycling ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 12
Author(s):  
Lindani Koketso Ncube ◽  
Albert Uchenna Ude ◽  
Enoch Nifise Ogunmuyiwa ◽  
Rozli Zulkifli ◽  
Isaac Nongwe Beas

Over the years, the world was not paying strict attention to the impact of rapid growth in plastic use. This has led to unprecedented amounts of mixed types of plastic waste entering the environment unmanaged. Packaging plastics account for half of the global total plastic waste. This paper seeks to give an overview of the use, disposal, and regulation of food packaging plastics. Demand for food packaging is on the rise as a result of increasing global demand for food due to population growth. Most of the food packaging are used on-the-go and are single use plastics that are disposed of within a short space of time. The bulk of this plastic waste has found its way into the environment contaminating land, water and the food chain. The food industry is encouraged to reduce, reuse and recycle packaging materials. A wholistic approach to waste management will need to involve all stakeholders working to achieve a circular economy. A robust approach to prevent pollution today rather than handling the waste in the future should be adopted especially in Africa where there is high population growth.


2021 ◽  
Author(s):  
Debbie Roy ◽  
Emma Berry ◽  
Martin Dempster

Millions of tonnes of plastic are ending up in our oceans and creating a global environmental hazard. Around 50 percent of plastics are designed for single use, mainly for food packaging. Plastic waste is often found discarded as litter, despite significant investment over the last 20-30 years to increase recycling facilities and kerbside collection of waste materials. While there is a substantive body of literature about general recycling behaviour, few insights exist that may help us understand why a sizeable number of consumers and householders are failing to sort plastics for recycling at optimal levels. As a consequence, used plastic is ending up in landfill and is polluting the environment. This current study used in-depth qualitative interviews within a framework that seeks to identify underlying opportunities, motivations and capabilities of individuals when it comes to plastic recycling. The principle findings are that the respondents are generally positive about recycling and express a degree of environmental concern about the damage plastic waste causes to the natural world. However, this concern does not translate into efforts to obtain accurate information about plastics disposal. Efforts are lower when visual reminders of its harmful impact are absent, and when faced with a confusing array of packaging that combines several types of plastics. Householders believe the responsibility for making plastic recycling easier rests heavily with local government and manufacturers. Until greater uniformity in packaging is achieved, plastics recycling rates may struggle to reach optimal levels.


Sign in / Sign up

Export Citation Format

Share Document