Cleaner Waste Systems最新文献

{"title":"Study on polymer-containing oily sludge as a potential fuel by combustion thermochemistry","authors":"Yuhao Cao ,&nbsp;Mulin Zou ,&nbsp;Aohan Ran ,&nbsp;Peiying Zong ,&nbsp;Zhaowei He ,&nbsp;Xiang Gou","doi":"10.1016/j.clwas.2024.100182","DOIUrl":"10.1016/j.clwas.2024.100182","url":null,"abstract":"<div><div>The environmental and resource issues posed by oil sludge have sparked a renewed interest in cleaner and more efficient oil production. The investigation on the combustion process of polymer-containing oily sludge (POS) is expected to open up new markets for POS as an alternative fuel. TGA was used to examine the combustion behaviour, kinetics, and thermodynamics of POS, and X-ray fluorescence (XRF) was used to measure the chemical composition of POS ash to predict ash fouling and slagging. Based on the TG-DTG curves, the mass loss of POS in combustion studies was split into four major areas. The combined calculation method of model-free methods, Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS), was applied to determine the activation energies from stage 1 to stage 4, which were 47.89 kJ/mol, 66.09 kJ/mol, 190.55 kJ/mol, and 98.37 kJ/mol, respectively. A four-stage kinetic model (D4→D2→D3→R2) was established to describe the combustion process of POS. Compared to other conventional sludges, POS has a relatively low activation energy and is more susceptible to thermochemical transformations. The difference between the enthalpy change (Δ<span><math><mi>H</mi></math></span>) and activation energy (<span><math><mi>E</mi></math></span>) indicated that the reactions benefit the formation of the activated complex. Meanwhile, the change in entropy (Δ<span><math><mi>S</mi></math></span>) implied the thermodynamic disequilibrium in the 3rd stage of POS and completion of the thermal conversion at the end of the reaction. The change in Gibbs free energy (Δ<em>G</em>) increased in a stepwise manner and its lower average value reflected the greater reaction favourability of combustion for POS. The composition of POS ash was mainly metal oxides, with the slagging index, fouling index, and slagging viscosity index of 1.0, 9.1, and 32.0, respectively. POS ash has high fouling and slagging, with special attention in the combustion application.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"9 ","pages":"Article 100182"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The future of waste management in Ghana: Assessing the feasibility and scalability of smart waste solutions amidst key adoption challenges","authors":"Kwame Anokye ,&nbsp;Ohene Boansi Apea ,&nbsp;Abigail Okyere Darko ,&nbsp;Luther Adjei Kwabi","doi":"10.1016/j.clwas.2024.100183","DOIUrl":"10.1016/j.clwas.2024.100183","url":null,"abstract":"<div><div>This study explores the potential of smart waste management systems to transform waste disposal practices in Ghana, a nation grappling with significant waste management challenges. The research reveals a stark contrast between the limited infrastructure and traditional waste disposal methods prevalent in rural areas and the more developed, yet still imperfect, systems in urban centers. The study highlights the feasibility of integrating smart technologies—such as sensor-equipped bins, GPS tracking, and data analytics—into Ghana’s waste management landscape, despite the considerable economic, infrastructural, and social barriers. A key finding is the need for foundational improvements in waste infrastructure before advanced smart systems can be effectively introduced, particularly in rural areas. The study also throws more light on the importance of public-private partnerships and targeted public education campaigns to overcome these barriers and foster broader adoption of smart technologies. Along offering practical recommendations and drawing comparisons with similar efforts in other low-income countries, this research provides valuable insights for policymakers and stakeholders aiming to enhance waste management practices in Ghana. This study is novel in its focus on applying smart waste management solutions in the context of a developing country like Ghana. While much existing research centers on developed nations, this study uniquely addresses the intersection of socio-economic and technological factors specific to Ghana, offering a well-designed practicable and actionable approach to implementing advanced waste management technologies in a challenging environment.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"9 ","pages":"Article 100183"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mitigating landfill emissions strategies for effective waste management in tabuk","authors":"Abderrahim Lakhouit","doi":"10.1016/j.clwas.2024.100187","DOIUrl":"10.1016/j.clwas.2024.100187","url":null,"abstract":"<div><div>This study investigates the environmental impacts associated with solid waste management in the Tabuk region of Saudi Arabia, specifically focusing on the implications of landfill emissions. With the population of Tabuk projected to increase from 887,536 in 2023–928,036 by 2050, the quantity of waste generated is expected to rise significantly, reaching an estimated 575,846,338 kg annually. This research highlights the critical relationship between increasing waste generation, greenhouse gas emissions, and environmental degradation, emphasizing the production of methane and carbon dioxide—potent contributors to global warming and air pollution. Utilizing the LandGEM model, emissions associated with rising waste volumes are quantified, revealing alarming trends in soil and groundwater contamination that adversely affect local ecosystems and biodiversity. Furthermore, the analysis indicates that the potential for biogas production from waste could yield substantial energy output, with projections showing an increase in biogas collection from 99,741 m³ in 2024 to approximately 1,514,931 m³ by 2050, translating into over 15 million kWh of renewable energy. The findings underscore the urgent need for effective waste management strategies in Tabuk, advocating for enhanced waste segregation and investment in waste-to-energy technologies as viable solutions. Ultimately, this research lays the groundwork for developing sustainable waste disposal practices that align with Saudi Arabia’s Vision 2030, fostering environmental sustainability and public health in the region.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"9 ","pages":"Article 100187"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and characterization of nano-Plaster of Paris from Babylonia japonica, Oliva sayana, and Conasprella bermudensis","authors":"Md. Kawsar ,&nbsp;Md. Sahadat Hossain ,&nbsp;Sumaiya Akter ,&nbsp;Newaz Mohammed Bahadur ,&nbsp;Samina Ahmed","doi":"10.1016/j.clwas.2024.100189","DOIUrl":"10.1016/j.clwas.2024.100189","url":null,"abstract":"<div><div>In this study, Plaster of Paris (POP, CaSO₄.0.5H₂O) was successfully synthesized from the shells of marine mollusks, specifically <em>Conasprella bermudensis, Babylonia japonica,</em> and <em>Oliva sayana</em>, highlighting the potential of utilizing marine resources for material production. The synthesis process was accelerated through a chemical reaction between the mollusk shells and sulfuric acid, which provided calcium and sulfate ions, respectively. Various model equations were employed to assess the crystallite size, which was less than 200 nm; notably, all models except the Halder-Wagner technique yielded significant estimations for the synthesized products. The calculated energy density ranged from 1.32×10² to 2.38×10³ J/m³, with stress values between 5.02×10⁵ and 2×10⁶ and strain values from 5×10⁻⁴ to 1.7×10⁻³. The preferred growth calculation indicated that the (200), (400), and (020) planes are the most thermodynamically stable for the synthesized POP. Additionally, FTIR analysis confirmed the presence of sulfate and hydroxyl functional groups in the products. This research advances the understanding of nano-Plaster of Paris (POP) derived from marine sources, promotes sustainable practices in material synthesis, and explores new applications in construction and biomedical fields.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"9 ","pages":"Article 100189"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Threads untangled: Regional mapping of post-consumer textile management","authors":"Veerle Vermeyen ,&nbsp;Luc Alaerts ,&nbsp;Ernst Worrell ,&nbsp;Karel Van Acker","doi":"10.1016/j.clwas.2024.100181","DOIUrl":"10.1016/j.clwas.2024.100181","url":null,"abstract":"<div><div>In the coming decade, the EU intends to intervene in the textile value chain to steer it towards sustainability and circularity. As part of this effort, post-consumer textile (PCT) management should align with the waste hierarchy. This study employs material flow analysis (MFA) to examine and compare PCT management in two European regions: Flanders (Belgium) and the Netherlands. Additionally, future scenarios provide insights into transformations of PCT management toward 2030. The results show that Flanders outperformed the Netherlands in 2018, with a higher share of PCTs being collected separately, going to product recovery, local reuse, and material recovery. However, in both regions, there is still much potential to increase the recovery of products or materials. In 2018, local reuse was at only 4 % in Flanders and 2 % in the Netherlands. Most materials were still lost through incineration, with 52 % in Flanders and 62 % in the Netherlands. Even so, the future scenarios indicate that the Netherlands’ greater policy ambitions, with specific targets aimed at higher circular strategies, such as local reuse and closed-loop recycling, can result in more circular PCT management toward 2030. Hence, when designing interventions, policymakers should go beyond targets on separate collection to successfully steer the waste management of PCT toward circularity. This study shows how MFA-based monitoring provides a good overview of a specific system, allowing for a high level of transparency. Therefore, monitoring PCT management is key to developing informed policies and effective targets.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"9 ","pages":"Article 100181"},"PeriodicalIF":0.0,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interventions for reducing food waste and behavioural change among students in higher education institutions – A systematic review","authors":"Gajalakshmi Radhakrishnan ,&nbsp;S.K. Manivannan ,&nbsp;Dhivya Karmegam","doi":"10.1016/j.clwas.2024.100180","DOIUrl":"10.1016/j.clwas.2024.100180","url":null,"abstract":"<div><div>Minimizing food waste is crucial due to its environmental, economic, and social implications. As higher education institutions play a very important role in moulding the future society, educating and incorporating the behaviour of food waste minimization practices among young adults at college may help to create a society that is sustainable and environmentally conscious. The objective of this review is to examine the food waste reduction strategies implemented in university and college environments. The effective strategies in reducing waste and changing the behavior of the students were also investigated.The study systematically searched articles on interventions for food waste reduction in Pubmed, ScienceDirect, Scopus, and Springerlink databases from 2013 to 2023. From the 623 articles screened, 16 articles were included in this study. The interventions to decrease food waste that have been extensively researched in academic settings include awareness and information campaigns, tray-less dining and portion size reduction. In addition, altering plate sizes, offering financial incentives, and encouraging food sharing among college students were also implemented as food waste reduction strategies and evaluated in literatures. As the studies are heterogeneous, quantitatively comparing the effectiveness of different strategies in reducing food waste was not done. The majority of research involved implementing interventions during dinning time; however, adjustments can also be made beforehand based on students' preferences and food choices, which may lead to a reduction in food waste. In the future, research on Nudge-type interventions that take sociocultural and lifestyle aspects into account can be conducted to determine the long-term effects on students' changing food waste behaviors.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"9 ","pages":"Article 100180"},"PeriodicalIF":0.0,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transforming waste into strength: Evaluating properties of concrete with waste glass substitution","authors":"Kushal Rana Bhat ,&nbsp;Ghanshyam Dumre ,&nbsp;Tek Raj Gyawali","doi":"10.1016/j.clwas.2024.100179","DOIUrl":"10.1016/j.clwas.2024.100179","url":null,"abstract":"<div><div>Waste glass (WG) poses a significant environmental challenge due to its non-biodegradability and prevalence in landfills. This paper investigates the effects of using WG as a replacement for coarse aggregate (CA), fine aggregate (FA), and cement in concrete, utilizing WG coarse aggregate (WGCA), WG fine aggregate (WGFA), and WG powder (WGP), respectively. WG was mechanically crushed and sieved to obtain WGCA, WGFA, and WGP. The use of whole crushed waste glass (WG) particles, without any residue, introduces a novel aspect to this work. The study examined these replacements in a control concrete mix with a water-cement ratio of 0.38 and a mix proportion of cement, FA, and CA of 1:1.717:2.560 by weight. Replacement levels were set at 0 %, 5 %, 10 %, 15 %, 20 %, and 25 % by weight of the respective ingredient. Results showed that incorporating WG improved the slump value of the concrete while slightly decreasing its density. The optimum replacement levels were identified as 15 % for both WGCA and WGFA, and 10 % for WGP, which enhanced the 28-day compressive strength by 22.1 %, 20.1 %, and 13.1 %, respectively. At 20 % replacement for CA and FA, and 15 % for C, the compressive strength was comparable to that of the control concrete. The elastic modulus followed a similar trend to the compressive strength. However, at these optimum WG replacement levels, flexural strength decreased to 6.04 MPa, 5.89 MPa, and 6.14 MPa, respectively, from 6.32 MPa in the control concrete. Splitting tensile strength decreased to 2.97 MPa, 3.07 MPa, and 3.23 MPa, respectively, from 3.35 MPa. Water absorption also reduced to 3.83 %, 4.23 %, and 4.41 %, respectively, from 4.61 %. Empirical models were developed and compared with those from previous studies. Further research to strengthen the interfacial transition zone and ascertain detailed durability properties is necessary before implementing this sustainable concrete in real-world applications. The implementation of the results from this research may not only minimize glass waste but also contribute to the production of sustainable concrete, reducing CO₂ emissions and mitigating environmental degradation by lowering the consumption of cement and aggregates. Furthermore, this work plays a significant role in global efforts to reduce solid waste and combat environmental pollution.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"9 ","pages":"Article 100179"},"PeriodicalIF":0.0,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142538064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stripping down sustainability assessments for easier comparison of innovative recycling options","authors":"Erik Dekker ,&nbsp;Joris T.K. Quik ,&nbsp;Michelle A. Steenmeijer ,&nbsp;Johannes P.A. Lijzen","doi":"10.1016/j.clwas.2024.100178","DOIUrl":"10.1016/j.clwas.2024.100178","url":null,"abstract":"<div><div>In this short communication we propose a screening approach for assessing the sustainability of new recycling options. Before performing a full comparative LCA it is useful to perform a simplified LCA because of the lower data intensity. The impact categories are limited to greenhouse gas emissions and land use. As an example car tire recycling is shown. This screening approach is already useful for decision makers and can be used by stakeholders to compare innovative with the baseline technology.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"9 ","pages":"Article 100178"},"PeriodicalIF":0.0,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142537062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantification and characterization of municipal solid waste at aler dumpsite, Lira City, Uganda: Assessing pollution levels and health risks","authors":"Ogwang Nickson ,&nbsp;Zubeda Ukundimana ,&nbsp;Fwangmun B. Wamyil ,&nbsp;Abdulfatah Abdu Yusuf ,&nbsp;Mutuyimana Jean Pierre ,&nbsp;Abdou Safari Kagabo ,&nbsp;Theogene Rizinde","doi":"10.1016/j.clwas.2024.100177","DOIUrl":"10.1016/j.clwas.2024.100177","url":null,"abstract":"<div><div>Managing municipal solid waste (MSW) in urban areas of developing countries is a significant challenge due to rapid urbanization and inadequate infrastructure. This study aims to quantify the MSW at Aler dumpsite in Lira City, Uganda, and assess the associated environmental and health risks. Our findings revealed a daily dumping rate of 7.38 tons, predominantly organic waste. Leachate from the site exceeded WHO limits for nutrients and heavy metals, with exceptionally high amounts of cadmium (Cd) found in soil (4.8 mg/kg) and vegetables. The water quality in nearby streams was poor, rendering it unfit for consumption due to elevated ion and nutrient levels. Health risk assessments indicated significant non-carcinogenic risks from heavy metal ingestion, with a hazard index (HI) of 4.6 for adults and 9.6 for children. While dermal exposure risks were generally low, children were at risk from stream 1 (HQderm = 1.165). Vegetable analysis revealed levels of lead (Pb), cadmium (Cd), zinc (Zn), and nickel (Ni) above safe doses, posing significant non-carcinogenic risks. To address these issues, we recommend increasing public awareness to avoid consuming water and vegetables from areas around the dump site. Additionally, we suggest that the responsible authorities improve MSW management by constructing sanitary landfills to minimize water, soil, and plant pollution from landfill leachate.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"9 ","pages":"Article 100177"},"PeriodicalIF":0.0,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing performance of construction waste management: Factor analysis from the building contractors’ perspectives","authors":"Vuthea Min ,&nbsp;Kriengsak Panuwatwanich ,&nbsp;Koji Matsumoto","doi":"10.1016/j.clwas.2024.100176","DOIUrl":"10.1016/j.clwas.2024.100176","url":null,"abstract":"<div><div>With the rapid growth of urbanization, construction projects have surged, increasing construction waste (CW). Effective construction waste management (CWM) is crucial to mitigate the adverse effects of CW on the environment, society, and the economy. This study aimed to identify critical attributes and factors that enhance CWM in building construction. Attributes were initially identified through a literature review and verified by 32 experts. Subsequently, a questionnaire based on the retained attributes was developed, and a survey was conducted with 304 construction professionals from the building construction sector in Cambodia and Thailand. Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) were sequentially conducted and further revealed five factors with a total of 27 attributes, namely Governance and policies (8 attributes), Materials and equipment (8 attributes), Requirements and specifications (4 attributes), Construction information systems (4 attributes), and Waste collection facilities (3 attributes). This study identified and confirmed the critical attributes and factors in enhancing the contractors’ CWM performance in building construction that are specifically within the 2 R strategy (reduce and reuse) that contractors can fully control on their construction sites. The findings provide empirical evidence to guide contractors in improving CWM in building construction projects. By enhancing all attributes across the five key factors, contractors can minimize CW and reduce the negative impact of construction activities on the environment and society, thereby contributing to sustainable construction practices.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"9 ","pages":"Article 100176"},"PeriodicalIF":0.0,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142537938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}