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Waste Management & Research

Vitor Sousa, Celia Dias-Ferreira, João M Vaz, Inês Meireles
Extensive research has been carried out on waste collection costs mainly to differentiate costs of distinct waste streams and spatial optimization of waste collection services (e.g. routes, number, and location of waste facilities). However, waste collection managers also face the challenge of optimizing assets in time, for instance deciding when to replace and how to maintain, or which technological solution to adopt. These issues require a more detailed knowledge about the waste collection services' cost breakdown structure...
May 1, 2018: Waste Management & Research
Diogo Henrique Fernandes da Paz, Kalinny Patrícia Vaz Lafayette, Maria do Carmo Sobral
The objective of this article was to plan a network for municipal management of construction and demolition waste in Brazil with the assistance of a geographic information system, using the city of Recife as a case study. The methodology was carried out in three stages. The first was to map the illegal construction and demolition of waste disposal points across Recife and classify the waste according to its recyclability. In sequence, a method for indicating suitable areas for installation of voluntary delivery points, for small waste generators, are presented...
May 1, 2018: Waste Management & Research
Ho Kim, Seong Kuk Han, Eunhye Song, Seyong Park
This study is an assessment of the hydrothermal carbonisation of poultry slaughterhouse wastes sludge for the solid recovered fuel. The effects of hydrothermal carbonisation were evaluated by varying the reaction temperatures in the range of 170 °C-220 °C. After hydrothermal carbonisation was completed, the capillary suction time, time to filter, and particle size decreased by ranges of 170.4 to 25.9 s, 40 to 7.0 s, and 220 to 98 um, respectively, with increasing hydrothermal carbonisation temperature...
May 1, 2018: Waste Management & Research
Emerta Aragie, Jean Balié, Cristian MoralesOpazo
Reducing food losses and waste (FLW) is one of the sustainable ways of closing the food requirement gap in developing countries. However, there is not yet adequate knowledge on the extent of FLW by commodity type and stage of the food supply chain (FSC). Focusing on ten agrarian countries in Africa and building mainly on the Food and Agriculture Organization's Food Balance Sheets (FBSs), this study generates some new insights on the level of FLW by country, FSC and food type. Across the FSC, we find that these countries lose a cumulative amount equivalent to 28% (641 kilocalories per capita per day - kcal/cap/day) of the current calorie intake...
May 1, 2018: Waste Management & Research
Sunil S Suresh, Smita Mohanty, Sanjay K Nayak
The current investigation deals with the recycling possibilities of poly(vinyl chloride) and poly(methyl methacrylate) in the presence of acrylonitrile butadiene rubber. Recycled blends of poly(vinyl chloride)/poly(methyl methacrylate) are successfully formed from the plastic constituents, those are recovered from waste computer products. However, lower impact performance of the blend and lower stability of the poly(vinyl chloride) phase in the recycled blend restricts its further usage in industrial purposes...
May 1, 2018: Waste Management & Research
Bing Han, Qinghai Li, Zhen Liu, Zhongchao Tan, Yanguo Zhang
An experimental investigation of operational parameters, including liquid/gas ratio (L/G), inlet nitric oxide (NO) concentration, reaction temperature, and pH value of absorbing agent, on NO removal efficiency with hexamminecobalt(II) solution scrubbing was conducted on a pilot-scale facility to search optimal operation conditions. The experimental results show that NO removal efficiency increased with the pH value of hexamminecobalt solution, while the improving rate dropped gradually. When the reaction temperature increased, the NO removal efficiency increased first and then decreased...
May 1, 2018: Waste Management & Research
Yun-Ga Wu, Zhu-Jie Chu, Jun Zhuang
A municipal solid waste fee has become an important means for the implementation of the waste management rendered by the government all around the world. Based on the ecological environmental compensation theory, this article constructs an analytical framework of waste charging from the perspective of public policy evaluation, to carry on the comprehensive comparison and analysis to the operability, feasibility, validity, rationality, and universality of the two modes of waste charging: Ration charge and unit-pricing modes...
April 1, 2018: Waste Management & Research
Shira Daskal, Ofira Ayalon, Mordechai Shechter
Regulation is a key tool for implementing municipal solid waste (MSW) management strategies and plans. While local authorities in Israel are responsible for the storage, collection, and disposal of MSW, Israel's Ministry of Environmental Protection (MoEP) is responsible for the formulation and implementation of waste management policies and legislation. For the past 12 years, about 80% of the MSW in Israel has been landfilled and recycling rates have not increased, despite regulations. This paper presents the state of MSW management in Israel in light of the MoEP's strategic goal of landfilling reduction, the regulations and legislation designed and implemented for achieving this goal, and the ensuing results...
April 1, 2018: Waste Management & Research
Jing Yu, Dhanada K Mishra, Chang Wu, Christopher Ky Leung
Safe disposal of fly ash generated by coal-based thermal power plants continues to pose significant challenges around the world and in India in particular. Green structural concrete with 80% cement replaced by local Chinese fly ash has been recently developed to achieve a target characteristic compressive strength of 45 MPa. Such green concrete mixes are not only cheaper in cost, but also embody lower energy and carbon footprint, compared with conventional mixes. This study aims to adopt such materials using no less than 80% fly ash as binder in routine concrete works in countries like India with the commonly used lower target characteristic compressive strength of 30 MPa...
April 1, 2018: Waste Management & Research
J Faitli, B Csőke, R Romenda, Z Nagy, S Németh
The authors are working on the development of a mechanical-physical processing plant to prepare non-selectively collected residual municipal solid waste (RMSW) in the Zalaegerszeg region of Hungary. A key element of this processing plant is the newly developed KLME separator (the name KLME is the Hungarian abbreviation of 'combined magnetic, electric and air flow'). This separator is a combination of three widely applied separators, namely a magnetic separator, an eddy current separator and two types of air flow separators designed without the ordinarily necessary cross connecting belt conveyors and feeders...
April 1, 2018: Waste Management & Research
Aistė Karpušenkaitė, Tomas Ruzgas, Gintaras Denafas
The aim of the study was to create a hybrid forecasting method that could produce higher accuracy forecasts than previously used 'pure' time series methods. Mentioned methods were already tested with total automotive waste, hazardous automotive waste, and total medical waste generation, but demonstrated at least a 6% error rate in different cases and efforts were made to decrease it even more. Newly developed hybrid models used a random start generation method to incorporate different time-series advantages and it helped to increase the accuracy of forecasts by 3%-4% in hazardous automotive waste and total medical waste generation cases; the new model did not increase the accuracy of total automotive waste generation forecasts...
April 1, 2018: Waste Management & Research
Jianyong Shi, Xun Wu, Yingbo Ai, Zhen Zhang
The air permeability coefficient has a high correlation with the water content of municipal solid waste. In this study, continuous drying methodology using a tension meter was employed to construct the soil water characteristic curve of municipal solid waste (M-SWCC). The municipal solid waste air permeability test was conducted by a newly designed apparatus. The measured M-SWCC was well reproduced by the van Genuchten (V-G) model and was used to predict the parameters of typical points in M-SWCC, including saturated water content, field capacity, residual water content and water content at the inflection point...
April 1, 2018: Waste Management & Research
Fu Chen, Zhanbin Luo, Yongjun Yang, Gang-Jun Liu, Jing Ma
Waste pickers (WPs) play an indispensable role by helping to control municipal solid waste (MSW). However, they constitute the entry-level workforce of the waste recycling industry and receive little attention from the general public. In China, approximately 4 million WPs make their living by collecting MSW recyclable materials. To assess the role of WPs, an extensive social survey including urban management decision-makers, recycling industrial circle insiders, WPs, as well as common citizen respondents has been conducted in the city of Nanjing, China...
March 1, 2018: Waste Management & Research
Gurumwal George Longjan, Zahir Dehouche
Nigeria is the world's largest producer of yam, cassava, cocoyam/taro, beans/cowpea, egusi/melon seeds and among the largest producers of groundnut/peanut, plantain, corn/maize and ugwu/pumpkin leaves. These food crops generate unavoidable food wastes that can contribute to environmental degradation through unsanctioned waste disposal methods. Such food wastes can be utilised as feedstock for the anaerobic digestion (AD) process to produce renewable energy. In order to determine the suitability of the food wastes as biofuel feedstock, they were experimentally analysed...
March 1, 2018: Waste Management & Research
Zhenying Zhang, Yingfeng Wang, Hui Xu, Yuehua Fang, Dazhi Wu
A landfill is one of the main sites for disposal of municipal solid waste and the current landfill disposal system faces several problems. For instance, excessive leachate water is an important factor leading to landfill instability. Understanding the permeability characteristics of municipal solid waste is a relevant topic in the field of environmental geotechnical engineering. In this paper, the current research progress on permeability characteristics of municipal solid waste is discussed. A review of recent studies indicates that the research in this field is divided into two categories based on the experimental method employed: field tests and laboratory tests...
March 1, 2018: Waste Management & Research
Thomas Tsalis, Sonia Amarantidou, Paolo Calabró, Ioannis Nikolaou, Dimitrios Komilis
The implementation of a recyclable waste management system is a serious challenge for a society that aims to contribute to sustainability. The first operational step of such system is waste collection. In a number of European countries, the solid waste collection system has changed from the conventional kerbside system to a door-to-door collection. However, this type of waste collection system has not yet been introduced in Greece and its public acceptance prior to potential full implementation needs to be considered...
March 1, 2018: Waste Management & Research
Xue Zhang, Hengxiang Li, Qing Cao, Li'e Jin, Fumeng Wang
The managing and recycling of waste tires has become a worldwide environmental challenge. Among the different disposal methods for waste tires, pyrolysis is regarded as a promising route. How to effectively enhance the added value of pyrolytic residue (PR) from waste tires is a matter of great concern. In this study, the PRs were treated with hydrochloric and hydrofluoric acids in turn under ultrasonic waves. The removal efficiency for the ash and sulfur was investigated. The pyrolytic carbon black (PCB) obtained after treating PR with acids was analyzed by X-ray fluorescence spectrophotometry, Fourier transform infrared spectrometry, X-ray diffractometry, laser Raman spectrometry, scanning electron microscopy, thermogravimetric (TG) analysis, and physisorption apparatus...
March 1, 2018: Waste Management & Research
Miaomiao Niu, Qing Dong, Yaji Huang, Baosheng Jin, Hongyan Wang, Haiming Gu
To achieve high-temperature gasification-melting of combustible solid waste, ash melting behaviour under conditions simulating high-temperature gasification were studied. Raw ash (RA) and gasified ash (GA) were prepared respectively by waste ashing and fluidized bed gasification. Results of microstructure and composition of the two-ash indicated that GA showed a more porous structure and higher content of alkali and alkali earth metals among metallic elements. Higher temperature promoted GA melting and could reach a complete flowing state at about 1250°C...
March 1, 2018: Waste Management & Research
Lukas Kranzinger, Roland Pomberger, Daniel Schwabl, Helmut Flachberger, Markus Bauer, Markus Lehner, Wolfgang Hofer
In recent years, an increasing number of studies have revealed that plastics and their components (e.g. plasticisers) pose an environmental risk. However, it is hard to imagine how our industrialised society could do without these materials, since the fields of application are manifold. One possible approach to tackle this mounting problem is the implementation of a comprehensive and well-functioning collection and recycling system. An international comparison shows that only a small proportion of the total plastics in circulation is collected and recycled...
March 1, 2018: Waste Management & Research
David E Ross
No abstract text is available yet for this article.
May 2018: Waste Management & Research
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