scholarly journals RECYCLING AND PYROLYSIS OF WASTE PLASTICS

2015 ◽  
Vol 3 (9SE) ◽  
pp. 1-3
Author(s):  
Amrita Khatri
Keyword(s):  
20Th Century ◽  
Science And Technology ◽  
Plastic Waste ◽  
Waste Plastics ◽  
Technological Solution ◽  
Plastic Pollution ◽  
Mount Everest ◽  
Mechanical Recycling ◽  
Vast Amount ◽  
Plastic Wastes

Plastic has achieved such an extensive market due to fact that it is lightweight, cheap, flexible and reusable. But now it is regarded as a serious hazard. All recommendation for and against plastics finally land up on the reality that plastics are slow to degrade. By the end of the 20th century, plastics are found as persistent polluters of many environmental niches, from Mount Everest to the bottom of the sea. There are numerous ways by which plastic pollution can be controlled.  Pyrolysis is referred to as polymer cracking and its main advantages are that it can deal with plastic waste .This paper provides an overview of the science and technology of pyrolysis of waste plastics. The major advantage of the pyrolysis technology is its ability to handle unsorted, unwashed plastic. The production of gasoline, kerosene and diesel from waste plastics is an emerging technological solution to the vast amount of plastics that cannot be economically recovered by conventional mechanical recycling. The disposal and decomposition of plastics has been an issue which has caused a number of research works to be carried out in this regard. Currently, the paper reviews the production of Petroleum-based fuel viz. gasoline, kerosene and diesel from recycling of waste plastics is an emerging technological solution to the vast amount of plastic wastes that cannot be economically recovered by conventional mechanical recycling operations. This involves the use of pyrolysis which permits recovery of valuable gasoline and diesel-range hydrocarbons from waste plastics that are otherwise land filled.

scholarly journals Pyro-Oil and Wax Recovery from Reclaimed Plastic Waste in a Continuous Auger Pyrolysis Reactor

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 2040 ◽  
Author(s):  
Sultan Majed Al-Salem ◽  
Yang Yang ◽  
Jiawei Wang ◽  
Gary Anthony Leeke
Keyword(s):  
Product Distribution ◽  
Plastic Waste ◽  
Densification Process ◽  
Plastic Pollution ◽  
Waste Plastic ◽  
Diesel Fuels ◽  
Plastic Recycling ◽  
Plastic Wastes ◽  
Liquid Products ◽  
Pyrolysis Reactor

The increasing global waste plastic pollution is urging people to take immediate actions on effective plastic recycling and processing. In this work, we report the results of processing reclaimed plastic wastes from unsanitary landfill site in Kuwait by using a bench scale continuous auger pyrolysis system. The plastic feedstock was characterised. After a simple thermal densification process, the material was fed to the pyrolysis system at 500 °C. The pyro-oil and wax products were collected and characterised. The process mass balance was developed on dry basis, and the yields of pyro-oil, light wax, heavy wax and gases were 5.5, 23.8, 69.4 and 1.3 wt%, respectively. The findings have indicated that the reclamation of plastic waste from landfill was feasible in terms of the product distribution and characteristics. Further liquid analysis confirmed that the liquid products contained fractions that are comparable to petrol and diesel fuels. The wax products are viable and have potential application as coating, covering and lubrication.

scholarly journals Reducing plastic waste for the competitiveness of Vietnamese tourist attractions

2020 ◽  
Vol 210 ◽  
pp. 01011
Author(s):  
Minh Tuan Tran ◽  
Trung Luong Pham ◽  
Xuan Tung Nguyen
Keyword(s):  
Public Education ◽  
Sustainable Tourism ◽  
Plastic Waste ◽  
Plastic Pollution ◽  
Tourist Attractions ◽  
Sustainable Tourism Development ◽  
The Past ◽  
Plastic Bags ◽  
Plastic Wastes ◽  
Plastic Products

Plastic usage in tourism activities has increased significantly in Vietnam over the past decades, leading to the burden of plastic pollution and the threat to sustainable tourism development. The Vietnamese government has recognized the importance of plastic waste management in sustainable tourism. Laws and regulations on controlling pollution due to non-biodegradable plastic bags. Public education activities have been organized to encourage people replace plastic products with natural materials, reuse plastic bags and reduce plastic wastes. Many tourism businesses have found ways to limit plastic consumption, such as replacing disposal plastic products with eco-friendly products. Vietnamese tourism has taken the first steps in reducing plastic waste pollution in tourism activities. This article proposed some solutions to limit and restrain plastic wastes from tourism in Vietnam.

scholarly journals Fuzzy Based Spatial Risk Evaluation of Plastic Pollution: A Case Study of Anambra State of Nigeria

2021 ◽  
Author(s):  
Emmanuel Chibundo Chukwuma ◽  
Louis Chukwuemeka orakwe ◽  
Ejikeme Emmanuel Emenike ◽  
Chukwuma Chris Okonkwo
Keyword(s):  
State Government ◽  
Local Governments ◽  
Drainage Density ◽  
Plastic Waste ◽  
Mitigation Measures ◽  
Plastic Pollution ◽  
Terrestrial Environment ◽  
Anambra State ◽  
Spatial Risk ◽  
Plastic Wastes

Abstract Natural systems, human health, and artistic sensitivities are all threatened by plastic pollution in most developed and developing countries. Plastic has emerged as a major global threat with rivers serving as sink for transported plastics, emanating from the terrestrial environment as a result of human activities. Anambra State in Nigeria is arguably the business hub of the South-eastern part of Nigeria, with a massive output of plastic wastes daily from individuals, commercial activities and industries. Owing to an inefficient waste management system, plastic leakage into her drainage networks is a critical environmental challenge. The aim of this study is to geospatially model the vulnerability associated with the various plastic leakage factors to the environment. To achieve this aim, data on different thematic variables which include plastic waste density, slope, land-use, drainage density and distance to drainage network of the study area were modelled, Geographic Information Systems (GIS) was used to delineate the variables in order to obtain final risk map for the study area. The result of the study indicates that a total area very high risk is 1840.03 km2, this constitutes about 40.11% of the study area. Local Governments Areas (LGA) located in the southern part of the study area is more susceptible to plastic waste leakage, this could be linked to factors like high dense population and increasing rate of urbanization in the region. It is recommended that waste collection should be frequent, strategic and higher priority should be attached to the high risked area from this study. Anambra State Government also needs to work together with plastic recycling companies, for effective collection of plastic wastes in the areas classified as hotspots in plastic litter accumulation as one of the mitigation measures.

scholarly journals Plastic Waste Recycle for Industrial

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Muhammad Budi Haryono ◽  
Wikan Budi Utami
Keyword(s):  
Human Health ◽  
Review Paper ◽  
High Income ◽  
Plastic Waste ◽  
Plastic Pollution ◽  
Global Problem ◽  
Major Disease ◽  
Plastic Wastes

The high-income countries are leading to higher consumption of plastic, despite prominent contribution to the global problem of plastic pollution. The high quantities of plastic wastes are extremely threatening to harm the environment and inhabitants due to mismanagement such as ingested in the fish and also harmful to human health (cancer is a major disease) if such consuming a fish. This review paper explored a solution to treating plastic waste to improve the sustainability of the environment. The use of recycled plastic wastes as a component has been found to be the most beneficial as it can be used to replace all solid components.

Cost analysis of plastic solid waste recycling in an urban district in Turkey

2019 ◽  
Vol 37 (9) ◽  
pp. 906-913 ◽  
Author(s):  
Ayten Genc ◽  
Ozgur Zeydan ◽  
Selin Sarac
Keyword(s):  
Solid Waste ◽  
Unit Cost ◽  
Operating Cost ◽  
Waste Recycling ◽  
Plastic Waste ◽  
Cost Evaluation ◽  
Mechanical Recycling ◽  
Urban District ◽  
Plastic Recycling ◽  
Plastic Wastes

The usage of plastics has exponentially increased in our daily lives over the past 50 years because of its durability, low costs and potential for diverse applications, such as widespread use as disposable items. In this study, first, the recycling cost of plastic wastes has been estimated by using actual data taken from a recycling centre, where plastic solid wastes were collected separately. The total amount of plastic wastes recycled at the centre was approximately 695 tonnes. The operating cost of plastics separation at the recycling centre, the transport of plastic wastes, labouring, maintenance, electricity, insurance and chemical costs were taken into consideration in the cost evaluation. Accordingly, the unit cost of recycling was calculated as US$0.40 kg−1 of plastic waste. This cost was compared with the predicted plastic recycling cost in the same region using statistical values. The predicted recycling cost was estimated based on assuming segregated collection by the municipalities of all PSW in municipal solid waste. Then the resulting unit cost of recycling was found to be US$0.25 kg−1 of plastic waste. In addition, the recycling costs were also evaluated including the revenue from the sales of recycled plastic granular. According to the evaluated total cost of plastic recycling, it can be concluded that mechanical recycling of plastics can only be an economical option if the recovery of plastics is improved.

MECHANICAL RECYCLING OF WASTE PLASTICS: ACHIEVEMENTS AND CHALLENGES

10.6036/10251 ◽  
2021 ◽  
Vol 96 (4) ◽  
pp. 338-339
Author(s):  
JUAN LOPEZ MARTINEZ
Keyword(s):  
Plastic Waste ◽  
Waste Plastics ◽  
Mechanical Recycling ◽  
Plastic Materials ◽  
The Impact

Nowadays, the use of plastic materials is being questioned by society due to the impact of their waste on the environment. The accumulated generation of plastic waste in the period 1950-2015 is estimated to be 381 billion tons.

A Preliminary Study on Recyclability of Mixed Plastic Wastes Recovered from Urban Collection

2021 ◽  
Vol 885 ◽  
pp. 109-114
Author(s):  
Raffaella Ferraioli ◽  
Loredana Incarnato ◽  
Luciano Di Maio ◽  
Paola Scarfato
Keyword(s):  
Water Content ◽  
Chemical Properties ◽  
Polymeric Materials ◽  
Melt Processing ◽  
Plastic Waste ◽  
Mechanical Recycling ◽  
Single Screw Extruder ◽  
Plastic Wastes ◽  
And Performance ◽  
Recycled Plastics

The management of post-consumer plastic waste (PCPW) is a real challenging issue due to difficulties in effectively identifying and sorting the collected plastics and in their mechanical recycling. Indeed, mechanically recycled post-consumer plastic waste usually shows poor performances compared to virgin materials, due to incompatibility between constituents, presence of degraded materials, hygroscopicity and bad odors. Compatibilizers and nanoparticles can help to improve recycled plastics quality, but to be chosen and dosed properly they require an in-depth knowledge and characterization of the raw waste. In this study, an analysis of polymeric materials obtained from the separation and mechanical recycling of post-consumer plastic wastes from urban collection as pellets (UPW) is reported. In particular, the experimental characterization was carried out in order to identify UPW composition, water content, physical-chemical properties and processability. It was found that UPW samples are mainly constituted of polyethylene (PE) and polypropylene (PP) in equal parts. UPW was submitted to a melt processing operation, using a lab-scale single-screw extruder, obtaining ribbons that were completely characterized. With the aim to investigate the effect of water content on the recycled material processability and performance, the recycling process was carried out both on undried and dried UPW pellets.

On the Challenge of Plastic Wastes and Litter in Oceans: Some Policy Reflections

2021 ◽  
pp. 1-4
Author(s):  
Shailesh Nayak
Keyword(s):  
Scientific Knowledge ◽  
Marine Ecosystems ◽  
Plastic Waste ◽  
Plastic Pollution ◽  
Mechanical Breakdown ◽  
The World ◽  
Plastic Wastes ◽  
Effective Policy ◽  
Pelagic Ecosystems ◽  
Innovative Approaches

The increasing pollution in oceans, especially of the plastics litter, has degraded health of the oceans in many parts of the world. As plastic degrade very slowly, its accumulation in oceans expected to rise exponentially in coming decades and critically affect marine ecosystems, ocean fauna and humans. Microplastics, generated due to mechanical breakdown of plastic waste, is particularly affecting the pelagic ecosystems and can even alter them. It is necessary to generate and update scientific knowledge about production, transport, sink of plastics and their impacts, develop innovative approaches to manage plastic waste, and bringing awareness about effects of plastic pollution to communities. The issue of plastic pollution needs be tackled at local as well as regional levels through effective policy and multi-national cooperation.

scholarly journals Application of Plastic Wastes in Construction Materials: A Review Using the Concept of Life-Cycle Assessment in the Context of Recent Research for Future Perspectives

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3549
Author(s):  
Tulane Rodrigues da Silva ◽  
Afonso Rangel Garcez de Azevedo ◽  
Daiane Cecchin ◽  
Markssuel Teixeira Marvila ◽  
Mugahed Amran ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Solid Waste ◽  
Building Materials ◽  
Construction Materials ◽  
Plastic Waste ◽  
Plastic Wastes ◽  
Solid Waste Generation ◽  
Alternative Processes

The urbanization process contributes to the growth of solid waste generation and causes an increase in environmental impacts and failures in the management of solid waste. The number of dumps is a concern due to the limited implementation and safe disposal of this waste. The interest in sustainable techniques has been growing in relation to waste management, which is largely absorbed by the civil construction sector. This work aimed to review plastic waste, especially polyethylene terephthalate (PET), that can be incorporated with construction materials, such as concrete, mortars, asphalt mixtures, and paving. The use of life-cycle assessment (LCA) is related, as a tool that allows the sustainability of products and processes to be enhanced in the long term. After analyzing the recent literature, it was identified that studies related to plastic wastes in construction materials concentrate sustainability around the alternative destination of waste. Since the plastic waste from different production chains are obtained, it was possible to affirm the need for a broader assessment, such as the LCA, providing greater quantification of data making the alternative processes and products more sustainable. The study contributes to enhance sustainability in alternative building materials through LCA.

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