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1.
Waste Manag Res ; 39(11): 1365-1374, 2021 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-34617479

RESUMEN

This article presents field experience in developing local waste management plans called Kebijakan Strategi Daerah (Jakstrada) in the Lake Toba region, one of the popular tourist destinations in Indonesia. It examines the current waste management status and discusses key priorities and actions identified in the Jakstradas to improve the waste management based on resource management and 3R (reduce, reuse and recycle) principles. In partnership with public, private, academic and citizen groups, the project activities supported the development of Jakstradas in all seven regencies and established a resource recovery centre (RRC) as a model to practice 3Rs in the region. The key lessons learned from these project activities are discussed and some practical recommendations are identified based on a literature review, interviews and workshops with local government officials and residents. Through those opportunities, it was found that remote regencies around Lake Toba do not have environmentally sound final disposal sites and do not have the financial or technical capacity to provide waste collection and handling services to residents, which often results in illegal dumping and open burning of waste. It was also revealed that lack of established markets for recycling value chains and citizens participation in waste separation at source had resulted in limited success for recycling and 3R activities in the region.


Asunto(s)
Lagos , Administración de Residuos , Indonesia , Organizaciones , Reciclaje
2.
Comput Intell Neurosci ; 2021: 2143235, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34603427

RESUMEN

The research on the reverse resource network of e-waste at home and abroad is still in its infancy, and most of it is only based on traditional forward logistics. Reverse resources are the process of moving goods from their typical final destination for recycling value or proper disposal. With the intensification of market competition and the strengthening of environmental protection legislation by the government, reverse resources are no longer a neglected corner in the supply chain. The DLRNN model of the e-waste reverse resource recovery system constructed in this paper can provide an important theoretical and empirical basis for the rational utilization of waste electronic products and fully tap the potential value of waste electronic products, which is of great significance to the recycling of natural resources. In this paper, a hybrid network framework DLRNN based on deep learning (DL) and cyclic neural network (RNN) is designed for problem classification. Experimental results show that the classification accuracy of this framework is improved by 2.4% on TREC and 2.5% on MSQC without additional word vector conversion tools.


Asunto(s)
Residuos Electrónicos , Administración de Residuos , Reciclaje
3.
Comput Intell Neurosci ; 2021: 5942574, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34484322

RESUMEN

A rapid rise in inhabitants across the globe has led to the inadmissible management of waste in various countries, giving rise to various health issues and environmental pollution. The waste-collecting trucks collect waste just once or twice in seven days. Due to improper waste collection practices, the waste in the dustbin is spread on the streets. Thus, to defeat this situation, an efficient solution for smart and effective waste management using machine learning (ML) and the Internet of Things (IoT) is proposed in this paper. In the proposed solution, the authors have used an Arduino UNO microcontroller, ultrasonic sensor, and moisture sensor. Using image processing, one can measure the waste index of a particular dumping ground. A hardware prototype is also developed for the proposed framework. Thus, the presented solution for the efficient management of waste accomplishes the aim of establishing clean and pollution-free cities.


Asunto(s)
Internet de las Cosas , Administración de Residuos , Ciudades , Aprendizaje Automático
4.
J Hazard Mater ; 416: 126154, 2021 08 15.
Artículo en Inglés | MEDLINE | ID: mdl-34492935

RESUMEN

Recent trends in food waste and its management have increasingly started to focus on treating it as a reusable resource. The hazardous impact of food waste such as the release of greenhouse gases, deterioration of water quality and contamination of land areas are a major threat posed by food waste. Under the circular economy principles, food waste can be used as a sustainable supply of high-value energy, fuel, and nutrients through green techniques such as anaerobic digestion, co-digestion, composting, enzymatic treatment, ultrasonic, hydrothermal carbonization. Recent advances made in anaerobic co-digestion are helping in tackling dual or even multiple waste streams at once with better product yields. Integrated approaches that employ pre-processing the food waste to remove obstacles such as volatile fractions, oils and other inhibitory components from the feedstock to enhance their bioconversion to reduce sugars. Research efforts are also progressing in optimizing the operational parameters such as temperature, pressure, pH and residence time to enhance further the output of products such as methane, hydrogen and other platform chemicals such as lactic acid, succinic acid and formic acid. This review brings together some of the recent progress made in the green strategies towards food waste valorization.


Asunto(s)
Compostaje , Eliminación de Residuos , Administración de Residuos , Anaerobiosis , Biocombustibles , Reactores Biológicos , Alimentos , Hidrógeno , Metano
5.
Waste Manag Res ; 39(11): 1427-1436, 2021 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-34494917

RESUMEN

Management of waste is one of the major challenges faced by many developing countries. This study therefore attempts to develop a circular economy (CE) model to manage wastes and closing the loop and reducing the generation of residual wastes in Indian municipalities. Through extant literature review, the researchers found 30 success factors of CE implementation. Using the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) SIMOS approach, the rating and weight of decision makers (DMs) for each factor were collected. A structured questionnaire has been developed incorporating all these 30 factors, to extract the most important factors. The data was collected from top 10 officials (DMs) from the Chennai municipality, who handle three regions (metropolitan, suburbia and industrial). Based on the TOPSIS SIMOS analysis, nine CE implementing factors (critical success factors (CSFs)) among the 30 variables that were significant based on the cut-off value was identified. A CE model has been proposed based on these nine CSFs for waste management in India.


Asunto(s)
Reciclaje , Administración de Residuos , Ciudades , India , Modelos Económicos
6.
J Environ Manage ; 300: 113702, 2021 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-34517230

RESUMEN

Composting and vermicomposting have attracted attention in relation to both waste management and the potential to produce organic amendments that could improve soil quality. The main differences between compost depend on the feedstock, the production process, and the degree of maturity. In the present study, samples of compost of different origin (food and green waste, livestock waste, algae waste, urban waste or sewage sludge) or subjected to different composting methods (traditional or using earthworms) were collected for analysis. Additionally, samples collected at various stages of the composting process were compared (raw material, 15 and 30 days of composting, and final compost). Different analysis and techniques were used to establish the chemical composition, physicochemical and acid-base properties of compost samples and the organic matter extracts. The correlations obtained (between the abundance of acid groups in different extracts of the compost or between the cation exchange capacity and the C/N atomic ratio) would allow for predicting the compost behaviour based on certain characteristics, and a reduction in the number of parameters determined experimentally, thus facilitating comparisons between different compost. In addition, the potential value of the compost as amendment was tested with a Haplic Cambisol from a mining area. The application of compost increased the pH, the organic matter and nutrient content, and promoted seed germination and root growth.


Asunto(s)
Compostaje , Oligoquetos , Administración de Residuos , Animales , Aguas del Alcantarillado , Suelo
7.
Waste Manag Res ; 39(11): 1331-1340, 2021 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-34525881

RESUMEN

The processes related to solid waste management (SWM) are being revised as new technologies emerge and are applied in the area to achieve greater environmental, social and economic sustainability for society. To achieve our goal, two robust review protocols (Population, Intervention, Comparison, Outcome, and Context (PICOC) and Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA)) were used to systematically analyze 62 documents extracted from the Web of Science database to identify the main techniques and tools for Knowledge Discovery in Databases (KDD) and Data Mining (DM) as applied to SWM and explore the technological potential to optimize the stages of collecting and transporting waste. Moreover, it was possible to analyze the main challenges and opportunities of KDD and DM for SWM. The results show that the most used tools for SWM are MATLAB (29.7%) and GIS (13.5%), whereas the most used techniques are Artificial Neural Networks (35.8%), Linear Regression (16.0%) and Support Vector Machine (12.3%). In addition, 15.3% of the studies were conducted with data from China, 11.1% from India and 9.7% of the studies analyzed and compared data from several other countries. Furthermore, the research showed that the main challenges in the field of study are related to the collection and treatment of data, whereas the opportunities appear to be linked mainly to the impact on the pillars of sustainable development. Thus, this study portrays important issues associated with the use of KDD and DM for optimal SWM and has the potential to assist and direct researchers and field professionals in future studies.


Asunto(s)
Residuos Sólidos , Administración de Residuos , Minería de Datos , Bases de Datos Factuales , Descubrimiento del Conocimiento , Residuos Sólidos/análisis
8.
J Environ Manage ; 300: 113714, 2021 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-34547570

RESUMEN

Solid blasting waste generated from coating removal during ship repair and maintenance poses environmental challenges. This paper presents a review of the generation, characterization, and treatment of blasting waste in the ship repair industry. The quantities, properties, and environmental impacts of the generated blasting waste are summarized and analyzed, and the results indicate that blasting waste has a high generation rate and/or high toxicity. As alternatives to landfill, available blasting waste treatment methods include hydrometallurgical leaching, physical/physicochemical separation, thermal treatment, and direct utilization in the production of building materials. The advantages and disadvantages of these treatments are reviewed and compared. The production of building materials from blasting waste is currently attractive owning to its economic benefits and technical simplicity, whereas recycling blasting waste for high-value applications is gradually gaining research interest. The high dependence of the choice and performance of treatment methods on the waste type and characteristics is highlighted. The results emphasize the interest in conducting more research on physiochemical and thermal properties and the environmental effects of blasting waste. This review suggests that future research should focus more on paint waste management because of the restricted application of dry abrasive blasting and the development of nonabrasive blasting methods in the ship repair industry.


Asunto(s)
Navíos , Administración de Residuos , Conservación de los Recursos Naturales , Materiales de Construcción , Pintura , Reciclaje , Residuos Sólidos
9.
Waste Manag Res ; 39(10): 1218-1236, 2021 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-34525879

RESUMEN

Solid waste management (SWM) is an essential utility service. More than two to three billion people worldwide still lack basic services, whereas some countries are already moving beyond SWM towards waste and resource management (WaRM) and a circular economy. This paper sets out a novel conceptual framework and global theory of waste and development, providing a road map, allowing a country or city to locate their current position and plot their way ahead. We identify nine development bands (9DBs) with significant commonalities in terms of critical challenges and developmental pressure points. DB1-DB4 reflect stepwise improvement towards the new baseline of meeting the SDG 11.6.1 indicators of universal collection and management in controlled facilities (DB5). Countries can then choose to move towards environmentally sound management and the 'reduce, reuse, recycle' (3Rs) (DB6-9), with an ultimate aspiration of 'zero waste'. We test the 9DBs conceptual framework against historical journeys of higher income countries. The main application will be in low- and middle-income countries striving towards SDG 11.6.1, where it fills a key gap in the practitioners' toolkit by enabling initial framing/scoping of the problem and smarter interventions to be designed and sense checked. Key insights include targeted governance/institutional reforms, appropriate and affordable systems/technology and adapting solutions to a diversity of local needs and realities.


Asunto(s)
Eliminación de Residuos , Administración de Residuos , Ciudades , Humanos , Reciclaje , Residuos Sólidos/análisis
10.
Waste Manag Res ; 39(10): 1256-1263, 2021 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-34579604

RESUMEN

This paper discusses the role of stakeholders' participation in decision-making of waste policies, exploring the case of the sectoral agreement (SA) of packaging in Brazil. This case represents a robust step to introduce circular economy for packaging in Brazil and Latin America. Since the enactment of the Brazilian National Solid Waste Policy in 2010, a series of agreements were created to introduce an alternative model of extended producer responsibility in the country. This historical analysis evaluates the decision-making and the outcomes of its participatory process. Three qualitative research methods were applied: 76 interviews with stakeholders at the three levels of governance; observation of five events during the negotiation process and analysis of government documents. The results show that stakeholders' participation was crucial throughout the policy design, contributing directly and indirectly to the outcomes of the SA, with knowledge exchange, creation of networks and by pressuring solid waste management issue onto the government's agenda. However, the participatory process is not straightforward, and during the agreement process, some advancements seem to be jeopardised, with risk of participation being exploited to legitimise political interests. At the end, research points out that participation needs to be promoted and expanded throughout all the stages of the policy cycle, bringing together also other stakeholders such as local governments and civil society.


Asunto(s)
Administración de Residuos , Brasil , Residuos Sólidos
11.
Waste Manag Res ; 39(10): 1302-1316, 2021 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-34581643

RESUMEN

Waste electrical and electronic equipment (WEEE) represent one of the growing waste streams in Europe, whose content of hazardous substances and valuable materials focus on how it is handled. However, there are differences between countries regarding e-waste management system in Europe. This paper analyses and presents data regarding the e-waste management system in Italy, one of the founding countries of the EU and Serbia - EU candidate country. Within this work, the following aspects were considered: legislative framework and EU directive goals in terms of e-waste, institutional setup, collection system, and existing recycling and treatment technologies. In addition, material flow analysis is used to model mass balance within WEEE treatment plants in both countries. Finally, through assessment and comparison of current systems in both countries, problems and shortages of Serbia's e-waste management system are addressed.


Asunto(s)
Residuos Electrónicos , Administración de Residuos , Residuos Electrónicos/análisis , Electrónica , Italia , Reciclaje , Serbia
12.
Waste Manag Res ; 39(10): 1317-1327, 2021 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-34583557

RESUMEN

The organic fraction (mainly food waste) is typically the most abundant of the separately collected waste streams. The research aims at investigating the influence of different types of collection bag on the environmental performances of the food waste management chain in Italy. A comparative life cycle assessment (LCA) between two alternative systems based on paper or bioplastic collection bags was carried out. It included the collection bags manufacturing and distribution, their use at the household, the transportation of collected food waste and its subsequent anaerobic digestion, including the valorisation of useful outputs and the management of residues. The two systems were modelled mainly with primary data related to the current management system and to tests performed on bags. The LCA was performed with two different modelling approaches applied in the environmental product declaration (EPD) system and in the product environmental footprint (PEF) studies, respectively. In the scenario representing the average conditions, higher environmental impacts are shown by the use of bioplastic bags compared to paper ones with the EPD approach (+257%/+576%). With the PEF approach, the differences between the two systems are lower (-55%/+133%). Moreover, paper bags could allow for further impact reductions assuming a decrease of the food waste collection frequency, allowed by higher weight losses and a lower generation of leachate and odour during the household storage.


Asunto(s)
Eliminación de Residuos , Administración de Residuos , Animales , Ambiente , Alimentos , Estadios del Ciclo de Vida
13.
J Environ Manage ; 299: 113639, 2021 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-34479146

RESUMEN

Sustainability has become a focus area for practitioners and scholars due to the growing socio-economic issues. The sustainability of airport operations is being raised in various international platforms. This paper aims to identify the dimensions of sustainability and evaluate sustainable practices in airports of selected ASEAN countries. The various dimensions associated with the environmental aspect are energy management, emissions management, water and effluents management, solid waste management. It was understood that noise management, employee development, and community investment belong to the social dimension. Similarly, the factors such as economic contribution, passenger experience, airport safety, and security are inclined to economic dimensions of sustainability. It was found that environmentally sustainable practices have greater importance than social and economic initiatives in the airport context which provide quantifiable benefits for airports in the long term. Airport operators in South East Asia strived to mitigate carbon emissions, reduce waste and effluents, enhance the economic contribution, satisfy passengers, and meet employee needs. Compared to the total economic and social benefits obtained from these airports, the negative impacts of airport operation (such as noise emission from aircraft) are minimal but significant. The most common sustainable initiatives in airports, such as employee development, energy management, and passenger safety, supported sustainable development goals (SDG) 8, SDG 9, and SDG 11. A weak connection is observed between SDG 14 & SDG 15 and the airport's sustainable practices. The new technological innovations are concentrated in busy and profitable airports. A slow trend towards the adoption of new technologies for sustainable practices is observed in airports. The paper concludes that major airport operators in South-East Asia have effectively responded to the growing sustainability challenges in aviation markets. The sustainable dimensions and practices discussed will be valuable resource for airports striving to achieve sustainability goals.


Asunto(s)
Aeropuertos , Administración de Residuos , Aeronaves , Residuos Sólidos , Tecnología
14.
J Environ Manage ; 299: 113625, 2021 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-34482109

RESUMEN

The indiscriminate use of plastics and careless management of plastic waste have caused serious environmental challenges globally. The Republic of Korea (ROK) aims to address the issue by reducing plastic waste generation by up to 50%, and increasing recycling rate by up to 70%, by 2030. To determine the status and future directions for plastic waste management in the ROK, the present study undertook two tasks: (i) a material flow analysis of plastic waste material from industrial sectors to assess the current status of plastic waste recycling and treatment, (ii) an analysis of the material flow of plastic waste based on the "Waste Classification Code." According to the findings, 6.202 million metric tons of plastic waste were generated in 2018, out of which 69%, 25%, and 0.5% was recycled, incinerated, and landfilled, respectively. The recycling rate of synthetic resin waste, which accounts for 96% of synthetic waste polymers discharged in the industrial sector, was 69%, which is a very high rate. However, the closed-loop recycling rate was only 33%. Therefore, the system of management of synthetic resin waste discharge without classification of raw materials should be improved to increase the closed-loop recycling rate of synthetic waste polymers. Furthermore, to increase the closed-loop recycling rate, we suggest the subdivision of synthetic resin waste (51-03-01) in plastic waste classification to improve the discharge separation system, which has been mismanaged. Furthermore, we suggest the formulation of a new management strategy for plastic waste, in accordance with those of other hazardous substances, as regulated by the Waste Control Act.


Asunto(s)
Plásticos , Administración de Residuos , Polímeros , Reciclaje , Residuos
15.
Bioresour Technol ; 341: 125915, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-34523582

RESUMEN

Anaerobic digestion (AD) is a widely used technology to valorise food waste for biogas production yet a considerable amount of digestate remains under-utilised. Sustainable management and recycling of the nutrient-rich food waste anaerobic digestate (FWD) is highly desirable for closing resource loop and actualising circular economy. This work reviews the distinct properties of FWD and the existing treatment technologies. FWD shows great prospects as a nutrient source for microalgal cultivation and biofuel production. Emerging technologies such as thermal conversion (e.g., pyrolysis and hydrothermal treatment) of FWD into value-added products such as functionalised biochar/hydrochar with diverse applications would be attractive and warrant further research investigation. Integrated AD with subsequent valorisation facilities is highly encouraged to achieve complete utilisation of resources and reduce carbon emissions.


Asunto(s)
Microalgas , Eliminación de Residuos , Administración de Residuos , Anaerobiosis , Biocombustibles , Alimentos
16.
J Environ Manage ; 299: 113675, 2021 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-34526278

RESUMEN

Waste management is a prototypical issue that requires multiple policy measures to function together. Yet, the compatibility between waste management policies is vastly understudied. In this paper, we used a longitudinal quasi-experimental methodology to identify the effect of an incentivized household recycling program in Anji, China on public support for other waste management policies. The program was evaluated six and fifteen months after it was implemented, respectively. We found that, despite its positive influence on residents' self-reported recycling behavior, the program reduced support for policy measures concerning waste prevention and harmless disposal. Consistent with the theoretical propositions, such crowding-out was driven by the decrease in personal commitment to pro-environmental goals, perceived issue importance of environmental sustainability, and perceived importance of individual contribution to environmental goods. Further evidence suggests that the crowding-out effect attenuated but did not disappear in the long run. These findings contribute to a more comprehensive understanding of the holistic relationships between waste management policies, indicating that incentive-based recycling policies can interact negatively with other waste policies by reducing public support for them.


Asunto(s)
Eliminación de Residuos , Administración de Residuos , China , Humanos , Motivación , Políticas , Reciclaje , Residuos Sólidos/análisis
17.
Environ Sci Technol ; 55(18): 12672-12682, 2021 09 21.
Artículo en Inglés | MEDLINE | ID: mdl-34468140

RESUMEN

This work addresses the complex issue of asbestos containing materials (ACMs) management, by focusing on the scenario of six municipalities comprised in the Reggio Emilia province of Emilia Romagna Italian region. Particularly, the life cycle assessment (LCA) methodology was applied in order to assess in a quantitative and reliable manner the human toxicity as well as the ecotoxicity impacts associated with all of the different phases of ACMs management. The latter comprises mapping of ACMs, creation of a risk map for defining priority of intervention, encapsulation and removal of ACMs, as well as the as obtained asbestos containing waste (ACW) end of life. Particularly, a thermal inertisation treatment performed in a continuous industrial furnace was considered as the innovative end of life scenario to be compared with what actually was provided by the legislation of many countries worldwide, that is, the disposal of ACW in a controlled landfill for hazardous wastes. A characterization factor for asbestos fibers released both in outdoor air and in occupational setting was proposed for the first time and included in the USEtox 2.0 impact assessment method. This allowed us to reliably and quantitatively highlight that inertisation treatments should be the preferred solutions to be adopted by local and national authorities, especially if the obtained inert material finds application as secondary raw materials, thus contributing to a decrease in the environmental damage (limited to its toxicological contributions) to be associated with asbestos management.


Asunto(s)
Asbestos , Eliminación de Residuos , Administración de Residuos , Residuos Peligrosos , Humanos , Industrias , Italia
18.
Artículo en Inglés | MEDLINE | ID: mdl-34583823

RESUMEN

The Russian Federation is implementing a program for dismantling nuclear-powered submarines and nuclear service vessels decommissioned from the Navy. Program personnel may be exposed to mutagenic and carcinogenic factors, including ionizing radiation. Improved preclinical health diagnostics are desirable, for timely identification of health effects, optimization of preventive measures, and medical interventions. We used an improved version of the buccal micronucleus cytome assay (BMCyt) to conduct cytogenetic status assessment of 59 employees of the Far Eastern Center for Radioactive Waste Management (DalRAO). We observed a statistically significant increase in the frequency of buccal epithelial cells with cytogenetic abnormalities (2.31‰ versus 1.15‰) and a small decrease in the apoptotic index (42 % versus 44 %) in the exposure group vs. controls. An accumulation index of cytogenetic disorders (the ratio of cells with nuclear abnormalities to cells in apoptosis) was determined and significant differences were found between the exposure and control groups. The proposed approach is simple, non-invasive, and highly informative for monitoring the health status of personnel exposed to complex factors in the working environment.


Asunto(s)
Células Epiteliales/patología , Pruebas de Micronúcleos , Exposición Profesional , Exposición a la Radiación , Residuos Radiactivos , Administración de Residuos , Adulto , Anciano , Apoptosis , Mejilla , Análisis Citogenético , Femenino , Humanos , Masculino , Persona de Mediana Edad , Mutágenos/toxicidad
19.
Waste Manag ; 134: 11-20, 2021 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-34399206

RESUMEN

In recent years, concerns about the increasing generation of municipal solid waste, together with related health and environmental issues and regulatory changes, have motivated significant alterations in the provision of waste management services, such as the introduction of selective collection (by type of waste). However, these changes may impact on service costs and/or efficiency. The present study was undertaken to analyse the efficiency of the waste management service in Spain, using data from 283 municipalities for the period 2005-2015. The analysis consists of two phases: first, the application of panel data order-m frontiers, that allows to obtain a homogeneous estimation of efficiency based on the input-output relationship at the production process (Surroca et al., 2016), and second, the use of bootstrapped truncated regression, considering different municipal sizes. The results obtained show that cost efficiency is increased with selective collection and by certain political and socio-economic factors of the local governments, concretely with the government by a progressive party, coalition governments, a greater financial independence, a greater tourist and industrial activity and a greater proportion of women and of foreign-born residents in the municipality. We also show that municipal direct provision is the least efficient management form for this service. The main contribution made by this study is to examine the influence of different elements of service output (i.e., selection by type of waste vs. non-selection) on cost efficiency.


Asunto(s)
Eliminación de Residuos , Administración de Residuos , Ciudades , Eficiencia , Humanos , Residuos Sólidos/análisis
20.
Waste Manag ; 134: 67-77, 2021 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-34416672

RESUMEN

The aim of the study was to assess the effects of high concentrations (10 % w/w, data projected for 2030) of commercial bioplastics, i.e. starch based shopping bags (SBSB) and polylactic acid (PLA) tableware, in the organic fraction of municipal solid wastes (MSW) on compost quality obtained by pilot-scale dry mesophilic anaerobic digestion and subsequent composting of the digestate. After the biological processes, 48.1 % total solids (TS) of SBSB and 15 % TS of PLA degraded, resulting in a high bioplastics content (about 18 % TS) in compost. Subsequent compost incubation in soils indicated that bioplastics degraded by pseudo-zero order kinetics (0.014 and 0.010 mg C cm-2 d-1 for SBSB and PLA, respectively), i.e. complete degradation was expected in 1.6 years (SBSB) and 7.2 years (PLA), confirming the intrinsic biodegradability of bioplastics. Nevertheless, enhancing the rate and amount of bioplastics degradation during waste management represents a goal to decrease the amount of bioplastics reaching the environment.


Asunto(s)
Compostaje , Administración de Residuos , Anaerobiosis , Suelo , Residuos Sólidos
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