Cleaner Engineering and Technology最新文献

{"title":"Cattle rumen inoculated Gliricidia sepium with poultry manure: Pretreatment, biogas production, and optimization","authors":"O.S. Oladejo ,&nbsp;S.O. Dahunsi ,&nbsp;E.L. Odekanle ,&nbsp;O.A. Odeleye ,&nbsp;O.S. Aroyewon ,&nbsp;A.O. Oladele ,&nbsp;G.S. Fala ,&nbsp;A.A. Olanipekun ,&nbsp;A.O. Abiola ,&nbsp;J.O. Ojediran ,&nbsp;O.E. Ajayi ,&nbsp;O.A. Olawuni","doi":"10.1016/j.clet.2025.100923","DOIUrl":"10.1016/j.clet.2025.100923","url":null,"abstract":"<div><div><em>Gliricidia sepium</em> is a stubborn plant constituting environmental nuisance in several tropical regions. However, its richness in nutrient makes it a suitable candidate for the biotechnological production of bioenergy. This study assessed the potential of <em>Gliricidia sepium</em> for biogas production in a batch anaerobic digestion process, co-digested with poultry manure under mesophilic condition. A combination of mechanical and thermo-alkaline methods was applied to pretreat <em>Gliricidia sepium</em> in the main experiment, while another experiment without pretreatment was also conducted. The physicochemical properties of the substrates were determined using standard procedures while the Central Composite Design (CCD) of response surface methodology (RSM) was employed for experimental design and optimization of the process parameters. Results showed biogas yields of 1.3186 L/kg VS and 1.2535 L/kg VS for the pretreated and untreated substrates, respectively. The methane and carbon dioxide contents of biogas from both experiments were 60.43%; 35.08% and 38.62%; 11.72%, respectively. This showed 36.1% increase in methane yield in the pretreated experiment over the untreated. Also, the RSM predicted biogas yield was 1.32 L/kg VS in the inoculated (addition of bovine rumen content) pretreated experiment, with the model's coefficient of determination of 0.9776, indicate strong modeling and prediction accuracy for the inoculated experiment. The economic feasibility assessment of the pretreatment application also confirms that alkaline pretreatment is profitable in the pretreatment of <em>Gliricidia sepium</em> shoots and the investment is economically feasible. The study recommends further use of <em>Gliricidia sepium</em> co-digested with poultry manure especially as these two bioresources are abundant in most developing regions of the world where they serve no important purpose. Their usage on the commercial scale is therefore advocated.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"25 ","pages":"Article 100923"},"PeriodicalIF":5.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529572","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":"Techno-economic analysis of renewable hybrid system microgrids for minimizing grid power outages in residential areas","authors":"Marzieh Salehi,&nbsp;Majid Khanali,&nbsp;Hassan Ghasemi-Mobtaker","doi":"10.1016/j.clet.2025.100924","DOIUrl":"10.1016/j.clet.2025.100924","url":null,"abstract":"<div><div>The increasing frequency of grid blackouts and CO₂ emissions in countries heavily reliant on fossil fuels for their national power grids, such as Iran, has led to reduced power supply reliability and environmental challenges. Effectively utilizing renewable energy to address blackouts is challenging for governments due to the intermittent nature of renewables, peak demand variations, and potential excess generation. Therefore, this study examines the techno-economic feasibility of a hybrid renewable microgrid to mitigate power outages in large-scale residential areas under various outage scenarios. Real demand and capacity shortage data were imported into HOMER software to optimize the grid-connected system using a cycle charging dispatch strategy. Different scenarios were considered, including outages based on existing conditions, during renewable resource peaks, and during demand peaks. Results show that if the government schedules outages during sunny hours to compensate for capacity shortages using photovoltaics, large-scale renewables become more cost-effective. The optimal solution supplies more than 45% of the 591 MW h/day demand with renewables by installing 49.8 MW of PV, 22.5 MW of wind turbines, a 34.5 MW h battery bank, and a 5 MW electrolyzer plant. This solution results in an energy cost of $0.07/kWh and less than 7.7% excess electricity, improving the annual capacity shortage to less than 1% of demand. Additionally, more than 220 tons/year of green hydrogen is produced by utilizing over 10 GW h/year of excess power, justifying the slight cost increase associated with the electrolyzer. These results highlight the success of renewables optimization to supply capacity shortages for policymakers.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"25 ","pages":"Article 100924"},"PeriodicalIF":5.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552178","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":"Low-emission methane fueled dual-bypass turbofan engine optimization based on machine learning: Energy-economic-environmental (3E) analysis","authors":"Mohammadreza Sabzehali,&nbsp;Mahdi Alibeigi,&nbsp;Saeed Karimian Aliabadi","doi":"10.1016/j.clet.2025.100919","DOIUrl":"10.1016/j.clet.2025.100919","url":null,"abstract":"<div><div>In aero propulsion, fuel consumption and pollutant rate emitted by aero engines are the most important issues in supersonic flight. In this research, a dual-bypass turbofan engine is proposed as an alternative to conventional turbofan engines, having less fuel consumption and less pollutant production. Both primary pollutants of the combustion engine, nitrogen oxides (NOx) and carbon monoxide (CO), and the economic as well as the environmental indices, i.e., thrust-specific nitrogen oxide production rate (TSNOx, g/kN·s), thrust-specific carbon monoxide production rate (TSCO, g/kN·s), thrust-specific fuel consumption (TSFC, g/kN.s), thrust-specific fuel cost (TSFCC, $/kN·s), have been considered in this analysis. A machine learning-based prediction method was employed to accelerate the multi-objective optimization. It has shown the Random Forest technique could enhanced the convergence of NSGA-II. Based on the results, 40% increase in the first bypass ratio, would reduce TSFC by 10%, and a 100% increase in the second bypass ratio, would reduce TSFC by 5%. Boosting the pressure ratio of the high-pressure compressor can result in lower NOx and CO production, while boosting the turbine inlet temperature would cause more NOx production. Although, in the latter case the CO production is lower. The optimum design point of the proposed engine has been drawn based on optimization. The proposed methodology and the mathematical model presented here, could be assumed as a basis for comprehensive analysis of the dual bypass engine. It may expedite the future studies in the field of supersonic business engines characterized by reduced pollution and improved efficiency.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"26 ","pages":"Article 100919"},"PeriodicalIF":5.3,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637798","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":"Internet of Materials – A concept for circular material traceability","authors":"Raul Carlsson ,&nbsp;Tatiana Nevzorova","doi":"10.1016/j.clet.2025.100911","DOIUrl":"10.1016/j.clet.2025.100911","url":null,"abstract":"<div><div>There are many different approaches to establishing traceability of material items and products. However, known efforts consider unconnected parts or perspectives of material traceability, without aiming at a full picture. This has led to the development of many incompatible solutions. The traceability of different materials gets lost along value chains when materials are mixed together in warehouses or process industry. Highly identifiable products from industrial serial production are given model and serial numbers, which are only identifiable through their manufacturer. Even though sources of materials may be the same for different manufacturers, the lack of traceability harmonization between sectors makes identifying materials difficult to sort for recycling at the end of life. Supply chains of individual organizations are optimized for the individual company's needs. Solutions are also built on individual technologies that are suitable for limited types of traceability. Much effort is still needed to practically solve the incompatibilities, mismatches and gaps between the different existing and proposed solutions. This research introduces the Internet of Materials (IoM) concept, which is largely based on existing international standards as its components. The article lays out the feasibility of IoM as a harmonizing concept and also presents some of its challenges. Because of similarities in name and some application areas, the research also compares and positions IoM to the Internet of Things (IoT) concept. The paper concludes with implications of the IoM concept for analyzing and designing circular material traceability for sustainability transitions.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"25 ","pages":"Article 100911"},"PeriodicalIF":5.3,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421747","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":"Investigating the impact of fatty acid profiles on biodiesel lubricity using artificial intelligence techniques","authors":"Atthaphon Maneedaeng ,&nbsp;Attasit Wiangkham ,&nbsp;Atthaphon Ariyarit ,&nbsp;Anupap Pumpuang ,&nbsp;Ekarong Sukjit","doi":"10.1016/j.clet.2025.100913","DOIUrl":"10.1016/j.clet.2025.100913","url":null,"abstract":"<div><div>Biodiesel lubricity is a crucial factor influencing engine performance and longevity, primarily determined by its fatty acid composition. This study evaluates the tribological properties of biodiesel derived from 15 different feedstocks using High-Frequency Reciprocating Rig (HFRR) tests, 3D-laser microscopy, Scanning Electron Microscopy (SEM), and Energy-Dispersive X-ray Spectroscopy (EDS). The results indicate that biodiesel with higher unsaturation levels, particularly those rich in monounsaturated and polyunsaturated fatty acids, exhibits superior lubricity, characterized by reduced wear scar diameters and enhanced film formation. Conversely, biodiesels with high saturated fatty acid content demonstrate larger wear scar diameters and lower film formation efficiency, leading to increased friction and wear. To further analyze the impact of fatty acid composition on lubricity, an artificial intelligence (AI)-based approach using the Adaptive Boosting (AdaBoost) algorithm was implemented. The AI model effectively predicts wear scar diameter, friction coefficient, and film formation, providing insights into the complex interactions between fatty acid profiles and tribological performance. Feature importance analysis and sensitivity evaluation reveal that polyunsaturated fatty acids significantly enhance lubricity, while an optimal balance between saturated and unsaturated fatty acids is necessary to achieve stable frictional behavior. These findings emphasize the potential of AI-driven predictive modeling as a cost-effective tool for optimizing biodiesel lubricity, reducing the need for extensive experimental trials. The integration of advanced tribological testing and AI analysis offers a deeper understanding of biodiesel's lubrication mechanisms, supporting the development of high-performance, sustainable biofuels.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"25 ","pages":"Article 100913"},"PeriodicalIF":5.3,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454980","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":"Reusable beverages packaging: A life cycle assessment of glass bottles for wine packaging","authors":"Justus Caspers,&nbsp;Pauline Bade,&nbsp;Matthias Finkbeiner","doi":"10.1016/j.clet.2025.100914","DOIUrl":"10.1016/j.clet.2025.100914","url":null,"abstract":"<div><div>Bottle production constitutes up to 70% of the greenhouse gas emissions of wine consumption. However, a reuse system comes along with additional environmental burdens, namely via the impact of cleaning processes and increased transport distances for the return of packaging. Hence, the objective of this study is to assess the potential environmental implications associated with both reuse and single-use for wine bottles, by means of life cycle assessment (LCA).</div><div>Under the assumption based on wine consumption in Germany, the reusable bottle exhibits a reduced environmental impact in four out of five considered impact categories (climate change, fossil depletion, freshwater consumption, and freshwater ecotoxicity). Sensitivity analysis indicates that even one reuse cycle for wine bottles offers environmental benefit compared over single-use.</div><div>It is noteworthy that other studies, which also assess reusable beverage packaging, have reported smaller break-even points for the transport distances. This distinction arises from the study's exclusive focus on glass bottles, which dominate the wine market. In conclusion, a reusable wine bottle system holds the potential would significantly decrease the environmental footprint of wine consumption.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"25 ","pages":"Article 100914"},"PeriodicalIF":5.3,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421748","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":"Analyzing the environmental footprint of the chocolate industry using a hybrid life cycle assessment method","authors":"Shuhan Wang,&nbsp;Yahong Dong","doi":"10.1016/j.clet.2025.100912","DOIUrl":"10.1016/j.clet.2025.100912","url":null,"abstract":"<div><div>This study develops a hybrid life cycle assessment (H-LCA) framework for the chocolate industry. The analysis focuses on the top ten chocolate-consuming countries, encompassing life cycle stages from raw material production to waste management. The findings reveal that raw material production (64.64%) and chocolate manufacturing (28.90%) are the most significant contributors to environmental impact of the chocolate industry, with milk powder, sugar, and cocoa derivatives being notable factors. Among different types of chocolate, dark chocolate exhibits the lowest carbon emissions (3.11 kgCO₂eq/kg), whereas milk chocolate has the highest emissions (5.94 kgCO₂eq/kg). The environmental footprint correlates positively with consumption levels, with the top ten consuming countries contributing a total environmental footprint of 1.43E+08 pt in 2020, and the United States having the largest environmental footprint at 3.94E+07 pt (27.6%). Suggestions for reducing environmental impact and optimizing product formulas are proposed, offering valuable benchmarks for the application of LCA within the industry.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"25 ","pages":"Article 100912"},"PeriodicalIF":5.3,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421749","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":"Utilization of ladle furnace slag and fly ash as partially replacement of cement","authors":"Khin Sam Thwe ,&nbsp;Jiratchaya Ayawanna ,&nbsp;Lindung Zalbuin Mase ,&nbsp;Salisa Chaiyaput","doi":"10.1016/j.clet.2025.100910","DOIUrl":"10.1016/j.clet.2025.100910","url":null,"abstract":"<div><div>Ladle Furnace Slag (LFS) and fly ash (FA) are industrial waste products commonly deposited in landfills, while the cement industry is a major source of carbon dioxide (CO₂) emissions. Previous research has explored using LFS and FA as cement replacement materials to help mitigate environmental impacts. Yet, no studies have explored combining LFS and FA as cement replacement materials. Therefore, this research highlights the study of the combination of LFS and FA mixes as a partial cement replacement. The mix design for cement replacement materials was developed by combining ordinary Portland cement (OPC), LFS, and FA in the following weight ratios: 10:10:80, 20:20:60, and 30:30:40. These mix designs were assessed in comparison to 100%OPC (% by weight), evaluating key properties (bulk density, specific gravity, normal consistency, setting time, compressive strength, flexural strength, and microstructural characteristics). According to the findings, incorporating LFS and FA, both pozzolanic materials effectively improved the strength of the material by promoting a pozzolanic reaction, particularly during the final stages of curing. Furthermore, it was found that a mixed design containing 20% OPC, 20% LFS, and 60% FA demonstrated suitable properties for cement replacement in various applications, with beneficial results in terms of setting time and strength development. From X-ray fluorescence (XRF) and scanning electron microscope (SEM analysis), C-S-H gel, as well as Ca(OH)₂ and Mg(OH)₂ chemical compounds, were formulated. The aforementioned replacement is being used to promote environmental sustainability through the efficient use of industrial byproducts.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"25 ","pages":"Article 100910"},"PeriodicalIF":5.3,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421746","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":"Study on the transient thermo-mechanical coupling mechanism at tool-chip interface in ultrasonic vibration assisted chip formation process under sustainable dry machining conditions","authors":"Xuelin Chen ,&nbsp;Wen Shao ,&nbsp;Jinyuan Tang ,&nbsp;Yuansheng Zhou ,&nbsp;Dimitrios Kontziampasis ,&nbsp;Shuai Mo ,&nbsp;Bo Hu","doi":"10.1016/j.clet.2025.100908","DOIUrl":"10.1016/j.clet.2025.100908","url":null,"abstract":"<div><div>Dry machining has become one of the most promising and sustainable manufacturing processes in mechanical machining. One of the main puzzles for industrial applications of dry machining is tool wear, which are closely related with the transient thermomechanical characteristics of tool-chip interface (TCI). Simultaneously, those characteristics at micro scale can provided the critical insight of cutting mechanics and tool wear in ultrasonic vibration assisted cutting (UVC). However, reports in literature appear to be scarce. In this study the transient model of thermomechanical behavior in TCI is proposed, with a consideration of characteristics changes induced by ultrasonic vibration, as well as a focus on the transient cutting mechanism, as well as stress and friction. The proposed model is validated by comparison with the experimental and published analytical results. Obtained results from the proposed model indicate that the distribution of normal stress and average shear stress are similar to those that are predicted by Zorev's model. However, a noticeable apparent discrepancy appears between the two models regarding the distribution of shear stress. Apparently, the ultrasonic vibration changes the friction via alternating normal and shear stresses, and delays the time for the cutting force and the stress to reach their peak point. Additionally, it is confirmed that the fluctuation and increment of friction coefficient is due to the cutting force reduction in UVC under sustainable dry conditions.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"25 ","pages":"Article 100908"},"PeriodicalIF":5.3,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395327","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":"Selection of electrochemical and electrical energy storage systems for off-grid renewable energy mini-grids: A review","authors":"Isaac Gwayi,&nbsp;Sarah Paul Ayeng’o,&nbsp;Cuthbert Z.M. Kimambo","doi":"10.1016/j.clet.2025.100906","DOIUrl":"10.1016/j.clet.2025.100906","url":null,"abstract":"<div><div>Application of electrochemical energy storage systems (ESSs) in off-grid renewable energy (RE) mini-grids (REMGs) is crucial to ensure continuous power supply. These storage systems face accelerated degradation due to fluctuations in demand and supply power of the system. Although various research has been conducted in the field of ESSs, study on selecting appropriate ESSs for off-grid REMGs, considering power fluctuations impact, is still a gap which needs further research. This review study therefore, focused on studying and selecting appropriate electrochemical and electrical storage systems for off-grid REMGs through investigating their technical, economic and environmental factors. On economic factors investigation; capital recovery factor (CRF) and annualised cost (AC) of considered ESSs were used in this study. Comparison and analysis of technical and economic factors of the storage systems were done using graphical method. Results show that hybrid combination of lithium-ion (Li-ion) battery or lead acid (Pb-Acid) battery with supercapacitor (SC) are appropriate ESSs for off-grid REMGs. Furthermore, trade-offs between ESSs options are analysed and the study recommends hybridisation of Li-ion, Pb-Acid and SC to further improve performance of the hybrid storage. Finally, challenges in deploying the proposed hybrid energy storage system (HESS) configurations are discussed and areas needing further research for improvement are proposed.</div></div>","PeriodicalId":34618,"journal":{"name":"Cleaner Engineering and Technology","volume":"25 ","pages":"Article 100906"},"PeriodicalIF":5.3,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376655","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}