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Waste Management & Research

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https://www.readbyqxmd.com/read/28521644/slope-stability-and-bearing-capacity-of-landfills-and-simple-on-site-test-methods
#1
Atsushi Yamawaki, Yoichi Doi, Kiyoshi Omine
This study discusses strength characteristics (slope stability, bearing capacity, etc.) of waste landfills through on-site tests that were carried out at 29 locations in 19 sites in Japan and three other countries, and proposes simple methods to test and assess the mechanical strength of landfills on site. Also, the possibility of using a landfill site was investigated by a full-scale eccentric loading test. As a result of this, landfills containing more than about 10 cm long plastics or other fibrous materials were found to be resilient and hard to yield...
May 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28488463/in-situ-biogas-upgrading-during-anaerobic-digestion-of-food-waste-amended-with-walnut-shell-biochar-at-bench-scale
#2
Jessica L Linville, Yanwen Shen, Patricia A Ignacio-de Leon, Robin P Schoene, Meltem Urgun-Demirtas
A modified version of an in-situ CO2 removal process was applied during anaerobic digestion of food waste with two types of walnut shell biochar at bench scale under batch operating mode. Compared with the coarse walnut shell biochar, the fine walnut shell biochar has a higher ash content (43 vs. 36 wt%) and higher concentrations of calcium (31 vs. 19 wt% of ash), magnesium (8.4 vs. 5.6 wt% of ash) and sodium (23.4 vs. 0.3 wt% of ash), but a lower potassium concentration (0.2 vs. 40% wt% of ash). The 0.96-3...
May 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28486846/optimisation-of-chemical-oxygen-demand-removal-from-landfill-leachate-by-sonocatalytic-degradation-in-the-presence-of-cupric-oxide-nanoparticles
#3
Paria Amirian, Edris Bazrafshan, Abolfazl Payandeh
Leachate is the liquid formed when waste breaks down in the landfill and water filters through that waste. This liquid is very toxic and can pollute the land, ground water, and water resources. In most countries, it is mandatory for landfills to be protected against leachate. In addition to all other harms to the environment, disposal of raw landfill leachate can be a major source of hazard to closed water bodies. Hence, treatment of landfill leachate is considered an essential step prior to its discharge from source...
May 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28464731/knowledge-behaviour-and-microbial-load-of-workers-handling-dental-solid-waste-in-a-public-health-service-in-brazil
#4
Cristina Dutra Vieira, Thaysa Leite Tagliaferri, Maria Auxiliadora Roque de Carvalho, Camilla Aparecida Silva de Oliveira, Paula Prazeres Magalhães, Simone Gonçalves Dos Santos, Luiz de Macêdo Farias
Healthcare wastes are those generated inside healthcare services, including dental clinics. Workers coming into close proximity to hazardous healthcare waste are potentially at risk. In an attempt to assess the knowledge and attitudes of workers dealing with infectious waste, a questionnaire was administered. The biological risk was investigated by evaluating the microbial load and screening some clinically relevant micro-organisms in the nasal mucosa, hands and coats of these workers. The results showed that 66...
April 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28462684/integrated-gasification-combined-cycle-using-egyptian-maghara-coal-rice-straw-feedstock
#5
A Hegazy, A O Ghallab, F H Ashour
Rice straw is an agricultural waste that causes an annoying problem in Egypt if it is not well exploited. This study focuses on using this waste in power generation by co-gasification of Egyptian Maghara coal and rice straw blends using entrained flow gasifier technology. Aspen Plus was used to conduct a parametric study for investigation of the effect of changing the inputs to the gasifier on the produced gas composition. Three different input parameters, influencing the performance of the gasifier, including the percentage of coal to rice straw in the blend, the fraction of added water to the blend, and the mass percentage of oxygen with respect to the mass of the blend fed to the gasifier were analysed...
April 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28431486/evaluating-the-operational-risks-of-biomedical-waste-using-failure-mode-and-effects-analysis
#6
Ying-Chu Chen, Pei-Yi Tsai
The potential problems and risks of biomedical waste generation have become increasingly apparent in recent years. This study applied a failure mode and effects analysis to evaluate the operational problems and risks of biomedical waste. The microbiological contamination of biomedical waste seldom receives the attention of researchers. In this study, the biomedical waste lifecycle was divided into seven processes: Production, classification, packaging, sterilisation, weighing, storage, and transportation. Twenty main failure modes were identified in these phases and risks were assessed based on their risk priority numbers...
April 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28431479/pneumatic-jigging-influence-of-operating-parameters-on-separation-efficiency-of-solid-waste-materials
#7
Mohd Aizudin Abd Aziz, Khairuddin Md Isa, Radzuwan Ab Rashid
This article aims to provide insights into the factors that contribute to the separation efficiency of solid particles. In this study, a pneumatic jigging technique was used to assess the separation of solid waste materials that consisted of copper, glass and rubber insulator. Several initial experiments were carried out to evaluate the strengths and limitations of the technique. It is found that despite some limitations of the technique, all the samples prepared for the experiments were successfully separated...
April 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28393635/assessment-of-environmental-policy-implementation-in-solid-waste-management-in-kathmandu-nepal
#8
Mohan B Dangi, Erica Schoenberger, John J Boland
In Nepal, full-fledged environmental legislation was rare before the democratic constitution of 1990. The first law covering the environment and sustainability was the Environment Protection Act 1997. While the Solid Waste Act was introduced in 1987, the problem of solid waste management still surfaces in Kathmandu. In order to understand the bedrock of this unrelenting failure in solid waste management, the manuscript digs deeper into policy implementation by dissecting solid waste rules, environmental legislations, relevant local laws, and solid waste management practices in Kathmandu, Nepal...
April 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28462678/using-life-cycle-assessment-to-address-stakeholders-potential-for-improving-municipal-solid-waste-management
#9
Milton Aurelio Uba de Andrade Junior, Guillherme Marcelo Zanghelini, Sebastião Roberto Soares
Because the consumption of materials is generally higher than their recovery rate, improving municipal solid waste (MSW) management is fundamental for increasing the efficiency of natural resource use and consumption in urban areas. More broadly, the characteristics of a MSW management system influence the end-of-life (EOL) impacts of goods consumed by households. We aim to indicate the extent to which greenhouse gas emissions from a MSW management system can be reduced by increasing waste paper recycling. We also address the stakeholders' contribution for driving transition towards an improved scenario...
May 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28462677/an-integer-programming-approach-to-a-real-world-recyclable-waste-collection-problem-in-argentina
#10
Gustavo Braier, Guillermo Durán, Javier Marenco, Francisco Wesner
This article reports on the use of mathematical programming techniques to optimise the routes of a recyclable waste collection system servicing Morón, a large municipality outside Buenos Aires, Argentina. The truck routing problem posed by the system is a particular case of the generalised directed open rural postman problem. An integer programming model is developed with a solving procedure built around a subtour-merging algorithm and the addition of subtour elimination constraints. The route solutions generated by the proposed methodology perform significantly better than the previously used, manually designed routes, the main improvement being that coverage of blocks within the municipality with the model solutions is 100% by construction, whereas with the manual routes as much as 16% of the blocks went unserviced...
May 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28462675/waste-management-and-research-and-the-sustainable-development-goals-focus-on-soil-and-groundwater-pollution
#11
Dimitris Dermatas
No abstract text is available yet for this article.
May 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28367757/integrated-environmental-policy-a-review-of-economic-analysis
#12
Hans Wiesmeth, Dennis Häckl
Holistic environmental policies, which emerged from a mere combination of technical activities in waste management some 40 years ago, constitute the most advanced level of environmental policies. These approaches to environmental policy, among them the policies in integrated waste management, attempt to guide economic agents to an environment-friendly behaviour. Nevertheless, current holistic policies in waste management, including policies on one-way drinks containers and waste electrical and electronic equipment, and implementations of extended producer responsibility with further applications to waste electrical and electronic equipment, reveal more or less severe deficiencies - despite some positive examples...
April 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28367756/a-multi-objective-model-for-sustainable-recycling-of-municipal-solid-waste
#13
Ali Mirdar Harijani, Saeed Mansour, Behrooz Karimi
The efficient management of municipal solid waste is a major problem for large and populated cities. In many countries, the majority of municipal solid waste is landfilled or dumped owing to an inefficient waste management system. Therefore, an optimal and sustainable waste management strategy is needed. This study introduces a recycling and disposal network for sustainable utilisation of municipal solid waste. In order to optimise the network, we develop a multi-objective mixed integer linear programming model in which the economic, environmental and social dimensions of sustainability are concurrently balanced...
April 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28367755/the-impact-of-nanoparticles-on-aerobic-degradation-of-municipal-solid-waste
#14
Senem Yazici Guvenc, Burcu Alan, Elanur Adar, Mehmet Sinan Bilgili
The amount of nanoparticles released from industrial and consumer products has increased rapidly in the last decade. These products may enter landfills directly or indirectly after the end of their useful life. In order to determine the impact of TiO2 and Ag nanoparticles on aerobic landfilling processes, municipal solid waste was loaded to three pilot-scale aerobic landfill bioreactors (80 cm diameter and 350 cm height) and exposed to TiO2 (AT) and Ag (AA) nanoparticles at total concentrations of 100 mg kg(-1) of solid waste...
April 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28367754/waste-pickers-in-global-south-informal-recycling-sector-in-a-circular-economy-era
#15
Costas Velis
No abstract text is available yet for this article.
April 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28195008/packaging-waste-prevention-in-the-distribution-of-fruit-and-vegetables-an-assessment-based-on-the-life-cycle-perspective
#16
Camilla Tua, Simone Nessi, Lucia Rigamonti, Giovanni Dolci, Mario Grosso
In recent years, alternative food supply chains based on short distance production and delivery have been promoted as being more environmentally friendly than those applied by the traditional retailing system. An example is the supply of seasonal and possibly locally grown fruit and vegetables directly to customers inside a returnable crate (the so-called 'box scheme'). In addition to other claimed environmental and economic advantages, the box scheme is often listed among the packaging waste prevention measures...
April 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28098022/system-dynamics-research-of-remanufacturing-closed-loop-supply-chain-dominated-by-the-third-party
#17
Shidi Miao, Tengfei Wang, Deyun Chen
With the rapid development of the electronic information industry in recent years, electronic products are being updated faster and faster, and e-waste recycling has become a common problem around the world. Firstly, this article contrasts recycling at home and abroad using the predicament of Midea Corp. Based on a closed-loop supply chain with the system dynamics method, a model is constructed and simulated. In this model, the collection point coverage rate is introduced to adjust the e-waste recycling rate dynamically...
April 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28097947/evaluating-waste-printed-circuit-boards-recycling-opportunities-and-challenges-a-mini-review
#18
Abhishek Kumar Awasthi, Gabriel Ionut Zlamparet, Xianlai Zeng, Jinhui Li
Rapid generation of waste printed circuit boards has become a very serious issue worldwide. Numerous techniques have been developed in the last decade to resolve the pollution from waste printed circuit boards, and also recover valuable metals from the waste printed circuit boards stream on a large-scale. However, these techniques have their own certain specific drawbacks that need to be rectified properly. In this review article, these recycling technologies are evaluated based on a strength, weaknesses, opportunities and threats analysis...
April 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28097922/cascade-use-indicators-for-selected-biopolymers-are-we-aiming-for-the-right-solutions-in-the-design-for-recycling-of-bio-based-polymers
#19
Jakob Hildebrandt, Alberto Bezama, Daniela Thrän
When surveying the trends and criteria for the design for recycling (DfR) of bio-based polymers, priorities appear to lie in energy recovery at the end of the product life of durable products, such as bio-based thermosets. Non-durable products made of thermoplastic polymers exhibit good properties for material recycling. The latter commonly enjoy growing material recycling quotas in countries that enforce a landfill ban. Quantitative and qualitative indicators are needed for characterizing progress in the development towards more recycling friendly bio-based polymers...
April 2017: Waste Management & Research
https://www.readbyqxmd.com/read/27932548/total-control-of-chromium-in-tanneries-thermal-decomposition-of-filtration-cake-from-enzymatic-hydrolysis-of-chrome-shavings
#20
P Kocurek, K Kolomazník, M Bařinová, J Hendrych
This paper deals with the problem of chromium recovery from chrome-tanned waste and thus with reducing the environmental impact of the leather industry. Chrome-tanned waste was transformed by alkaline enzymatic hydrolysis promoted by magnesium oxide into practically chromium-free, commercially applicable collagen hydrolysate and filtration cake containing a high portion of chromium. The crude and magnesium-deprived chromium cakes were subjected to a process of thermal decomposition at 650°C under oxygen-free conditions to reduce the amount of this waste and to study the effect of magnesium removal on the resulting products...
April 2017: Waste Management & Research
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