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Waste Management & Research

Xianjie Du, Guorui Feng, Yuxia Guo, Tingye Qi, Yujiang Zhang, Jun Guo
Cemented coal waste backfill material (CCWBM) is made of coal gangue, fly ash and cementitious materials. It has been widely used in the field of backfill mining to control surface subsidence and protect the environment. A large number of unconfined backfill bodies without lateral support are formed in partial backfill mining. To study the failure characteristics of unconfined CCWBM body in partial backfill, the stress-strain curves of the CCWBM were obtained by uniaxial compression tests at different ages (1-28 d)...
January 1, 2018: Waste Management & Research
Korai M Safar, Mahar R Bux, Uqaili M Aslam, Bhattacharjee A Shankar, Ramesh K Goel
This study analyzes the feasibility of putrescible components of municipal solid waste (PCMSW) such as food waste (FW) and yard waste (YW) for methane production in Pakistan. The batch experiments have been conducted at two different inoculums to substrate ratios (ISRs) by using various inoculums under mesophilic condition. The highest methane yield of FW and YW is achieved to be 428 Nml g-1 volatile solids (VS) added and 304 Nml g-1 VS added respectively by using buffalo dung inoculum at ISR-5. While, lowest methane yield of FW and YW is obtained as 236 Nml g-1 VS added and 151Nml g-1 VS added respectively by using effluent from a continuous stirrer tank reactor as inoculum at ISR-3...
January 1, 2018: Waste Management & Research
Chengqian Lin, Yong Chi, Yuqi Jin, Xuguang Jiang, Alfons Buekens, Qi Zhang, Jian Chen
Organic hazardous waste often contains some salt, owing to the widespread use of alkali salts during industrial manufacturing processes. These salts cause complications during the treatment of this type of waste. Molten salt oxidation is a flameless, robust thermal process, with inherent capability of destroying the organic constituents of wastes, while retaining the inorganic ingredients in the molten salt. In the present study, molten salt oxidation is employed for treating a typical organic hazardous waste with a high content of alkali salts...
January 1, 2018: Waste Management & Research
Dalong Zheng, Liping Ma, Rongmou Wang, Jie Yang, Quxiu Dai
Phosphogypsum is a solid industry by-product generated when sulphuric acid is used to process phosphate ore into fertiliser. Phosphogypsum stacks without pretreatment are often piled on the land surface or dumped in the sea, causing significant environmental damage. This study examined the reaction characteristics of phosphogypsum, when decomposed in a multi-atmosphere fluidised bed. Phosphogypsum was first dried, sieved and mixed proportionally with lignite at the mass ratio of 10:1, it was then immersed in 0...
January 1, 2018: Waste Management & Research
Matt Kluge, Nautasha Gupta, Ben Watts, Paul A Chadik, Christopher Ferraro, Timothy G Townsend
Concrete grinding residue is the waste product resulting from the grinding, cutting, and resurfacing of concrete pavement. Potential beneficial applications for concrete grinding residue include use as a soil amendment and as a construction material, including as an additive to Portland cement concrete. Concrete grinding residue exhibits a high pH, and though not hazardous, it is sufficiently elevated that precautions need to be taken around aquatic ecosystems. Best management practices and state regulations focus on reducing the impact on such aquatic environment...
December 1, 2017: Waste Management & Research
Wenxuan Zhang, Chengjian Xu, Wenzhi He, Guangming Li, Juwen Huang
The wide use of lithium ion batteries (LIBs) has brought great numbers of discarded LIBs, which has become a common problem facing the world. In view of the deleterious effects of spent LIBs on the environment and the contained valuable materials that can be reused, much effort in many countries has been made to manage waste LIBs, and many technologies have been developed to recycle waste LIBs and eliminate environmental risks. As a review article, this paper introduces the situation of waste LIB management in some developed countries and in China, and reviews separation technologies of electrode components and refining technologies of LiCoO2 and graphite...
December 1, 2017: Waste Management & Research
Nafiz E Korkut, Cevat Yaman, Yusuf Küçükağa, Megan K Jaunich, İbrahim Demir
This article estimates greenhouse gas emissions and global warming factors resulting from collection of municipal solid waste to the transfer stations or landfills in Istanbul for the year of 2015. The aim of this study is to quantify and compare diesel fuel consumption and estimate the greenhouse gas emissions and global warming factors associated with municipal solid waste collection of the 39 districts of Istanbul. Each district's greenhouse gas emissions resulting from the provision and combustion of diesel fuel was estimated by considering the number of collection trips and distances to municipal solid waste facilities...
December 1, 2017: Waste Management & Research
Conghao Sun, Liping Xu, Xiangping Chen, Tianyun Qiu, Tao Zhou
An eco-friendly and benign process has been investigated for the dissolution of Li, Co, Ni, and Mn from the cathode materials of spent LiNi1/3Co1/3Mn1/3O2 batteries, using DL-malic acid as the leaching agent in this study. The leaching efficiencies of Li, Co, Ni, and Mn can reach about 98.9%, 94.3%, 95.1%, and 96.4%, respectively, under the leaching conditions of DL-malic acid concentration of 1.2 M, hydrogen peroxide content of 1.5 vol.%, solid-to-liquid ratio of 40 g l-1, leaching temperature of 80°C, and leaching time of 30 min...
December 1, 2017: Waste Management & Research
Cynthia V Sepúlveda-Cervantes, Eduardo Soto-Regalado, Pasiano Rivas-García, Margarita Loredo-Cancino, Felipe dJ Cerino-Córdova, Refugio B García Reyes
In this study, a simultaneous optimisation of technical and environmental parameters for activated carbon production from soybean shells is presented. A 23 factorial design was developed to explore the performance of the technical responses yield and iodine number, and the single score of ReCiPe endpoint method, which was evaluated by means the life cycle assessment. The independent factors included in the design of experiments were the impregnation ratio, temperature, and time activation. Three quadratic equations were obtained and simultaneously optimised by maximisation of the overall desirability function...
November 1, 2017: Waste Management & Research
Diego V de Godoy Delmonico, Hugo H Dos Santos, Marco A P Pinheiro, Rosani de Castro, Regiane M de Souza
Healthcare waste management is an essential field for both researchers and practitioners. Although there have been few studies using statistical methods for its evaluation, it has been the subject of several studies in different contexts. Furthermore, the known precarious practices for waste management in developing countries raise questions about its potential barriers. This study aims to investigate the barriers in healthcare waste management and their relevance. For this purpose, this paper analyses waste management practices in two Brazilian hospitals by using case study and the Analytic Hierarchy Process method...
November 1, 2017: Waste Management & Research
Z Bourechech, F Abdelmalek, M R Ghezzar, A Addou
The aim of this work is to propose a plan for the choice of a suitable process for the treatment of a young leachate from municipal solid waste. Classical processes were applied: Fenton process, the coupling coagulation-Fenton process and the adsorption on powdered activated carbon (PAC). The study involves synthesised leachates from three types of wastes collected from sanitary landfill (SL): leachate of putrescible fraction (Lp), paper-cardboard (Lpc), sawdust (Ls) and the one of landfill (Lsl). The optimal operating conditions have been determined for the three processes: Fenton: [H2O2] = 6...
November 1, 2017: Waste Management & Research
Harinaivo A Andrianisa, Fanilo M Randriatsiferana, Serge L Rakotoson, Fanja Rakotoaritera
The social status improvement and the degree of integration of the informal recycling sector, by using InteRa, made by the AKAMASOA association interventions at the Andralanitra dumpsite (Antananarivo, Madagascar) was assessed. 20% of the workers from the three activities at the site were interviewed: 325 scavengers, 12 compost producers and three soap manufacturers. It was found that the incomes of Andralanitra workers are relatively low compared to that of people working in the same field in other countries (30-60 USD/month)...
November 1, 2017: Waste Management & Research
Mentore Vaccari, Terry Tudor, Andrea Perteghella
Given rising spend on the provision of healthcare services, the sustainable management of waste from healthcare facilities is increasingly becoming a focus as a means of reducing public health risks and financial costs. Using data on per capita healthcare spend at the national level, as well as a case study of a hospital in Italy, this study examined the relationship between trends in waste generation and the associated costs of managing the waste. At the national level, healthcare spend as a percentage of gross domestic product positively correlated with waste arisings...
November 1, 2017: Waste Management & Research
P S Calabrò, E Catalán, A Folino, A Sánchez, D Komilis
Opuntia ficus-indica (OFI) is an emerging biomass that has the potential to be used as substrate in anaerobic digestion. The goal of this work was to investigate the effect of three pretreatment techniques (thermal, alkaline, acidic) on the chemical composition and the methane yield of OFI biomass. A composite experimental design with three factors and two to three levels was implemented, and regression modelling was employed using a total of 10 biochemical methane potential (BMP) tests. The measured methane yields ranged from 289 to 604 NmL/gVSadded; according to the results, only the acidic pretreatment (HCl) was found to significantly increase methane generation...
November 1, 2017: Waste Management & Research
Simeng Li, Gang Chen
Microbial fuel cell (MFC) is a novel technology for landfill leachate treatment with simultaneous electric power generation. In recent years, more and more modern landfills are operating as bioreactors to shorten the time required for landfill stabilization and improve the leachate quality. For landfills to operate as biofilters, leachate is recirculated back to the landfill, during which time the organics of the leachate can be decomposed. Continuous recirculation typically results in evolving leachate quality, which chronologically corresponds to evolution stages such as hydrolysis, acidogenesis, acetogenesis, methanogenesis, and maturation...
November 1, 2017: Waste Management & Research
Reza Ebrahimzadeh, Ahmad Ghazanfari Moghaddam, Mehdi Sarcheshmehpour, Hamid Mortezapour
Biomass degradation kinetics of the composting process for kitchen waste, pruned elm tree branches and sheep manure were studied to model changes in volatile solids (VS) over time. Three experimental reactors containing raw mixtures with a carbon to nitrogen (C/N) ratio of 27:1 and a moisture content of 65% were prepared. During the composting process two of the reactors used forced air and the third used natural aeration. The composting stabilization phases in all reactors were completed in 30 days. During this period, composting indexes such as temperature, moisture content and VS changes were recorded...
November 1, 2017: Waste Management & Research
Binxian Gu, Takeshi Fujiwara, Renfu Jia, Ruiyang Duan, Aijun Gu
This paper presents a quantitative methodology and two empirical case studies in Japan on modeling household solid waste (HSW) generation based on individual consumption expenditure (ICE) and local waste policy effects by using the coupled estimation model systems. Results indicate that ICE on food, miscellaneous commodities and services, as well as education, cultural, and recreation services are mainly associated with the changes of HSW generation and its components in Okayama and Otsu from 1980 to 2014. The effects of waste policy measures were also identified...
November 1, 2017: Waste Management & Research
P Kannan, G Lakshmanan, A Al Shoaibi, C Srinivasakannan
Utilization of carbon dioxide (CO2) in thermochemical treatment of waste plastics may significantly help to improve CO2 recycling, thus simultaneously curtailing dioxins/furans and CO2 emissions. Although CO2 is not such an effective gasifying agent as steam, a few investigations have explored the utilization of CO2 in conjunction with steam to achieve somewhat higher carbon conversion. This work presents a comparative evaluation study of CO2 and steam gasification of a typical post-consumer waste plastics mixture using an Aspen Plus equilibrium model...
November 1, 2017: Waste Management & Research
Heinz-Georg Baum, Dieter Schuch
Benchmarking is a proven and widely used business tool for identifying best practice. To produce robust results, the objects of comparison used in benchmarking analysis need to be structurally comparable and distorting factors need to be eliminated. We focus on a specific example - a benchmark study commissioned by the European Commission's Directorate-General for Environment on the implementation of Extended Producer Responsibility (EPR) for packaging at the national level - to discuss potential distorting factors and take them into account in the calculation...
November 1, 2017: Waste Management & Research
Mario Grosso, Luca Falasconi
No abstract text is available yet for this article.
February 2018: Waste Management & Research
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