Waste management最新文献_第9页

Sustainable physical recycling of rigid PVC waste: A biobased solvent approach for the recovery of PVC, TiO2, and CaCO3 硬质PVC废弃物的可持续物理回收：用于回收PVC、TiO2和CaCO3的生物基溶剂方法

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-04-19 DOI: 10.1016/j.wasman.2025.114798

Annelore Aerts , Sandra Corderí Gándara , Maarten Rubens , Stijn Geudens , Tatsuhiro Kuwaba , Isabel De Schrijver , Karolien Vanbroekhoven , Kathy Elst

{"title":"Sustainable physical recycling of rigid PVC waste: A biobased solvent approach for the recovery of PVC, TiO2, and CaCO3","authors":"Annelore Aerts , Sandra Corderí Gándara , Maarten Rubens , Stijn Geudens , Tatsuhiro Kuwaba , Isabel De Schrijver , Karolien Vanbroekhoven , Kathy Elst","doi":"10.1016/j.wasman.2025.114798","DOIUrl":"10.1016/j.wasman.2025.114798","url":null,"abstract":"<div><div>For the first time, rigid polyvinyl chloride (PVC) waste has been successfully recycled using a dissolution-precipitation approach with biobased solvents. Hansen Solubility Parameter, HSP, predictions guided the systematic selection of solvents, while a modified HSP approach was developed to estimate the required non-solvent amounts for efficient polymer precipitation. Among the tested biobased solvents cyrene, γ-valerolactone (GVL) and 2-methyltetrahydrofuran demonstrated excellent dissolution performance, with water, methanol or isopropanol serving as effective non-solvents. The GVL-water system was the most efficient, requiring less than 10% non-solvent to achieve nearly complete separation and recovery of both the polymer and inorganic fraction without inducing polymer degradation. This optimized system was applied to a commercial PVC formulation for window frames, an end-of-life PVC window frame and a rigid PVC tube, achieving over 95% polymer recovery. Additionally, the process successfully removed more than 99% of inorganic fillers, enabling the selective purification and co-valorization of CaCO<sub>3</sub> or the valuable TiO<sub>2</sub>.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"202 ","pages":"Article 114798"},"PeriodicalIF":7.1,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An analytic hierarchy process combined with artificial neural network model to evaluate sustainable sludge treatment scenarios 采用层次分析法结合人工神经网络模型对污泥可持续处理方案进行评价

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-04-19 DOI: 10.1016/j.wasman.2025.114821

Yuhan Wu , Diannan Huang , Li Zhang , Rongxin Zhang , Pengfei Yu , Yunan Gao , Dongbin Wu , Yu Gao

{"title":"An analytic hierarchy process combined with artificial neural network model to evaluate sustainable sludge treatment scenarios","authors":"Yuhan Wu , Diannan Huang , Li Zhang , Rongxin Zhang , Pengfei Yu , Yunan Gao , Dongbin Wu , Yu Gao","doi":"10.1016/j.wasman.2025.114821","DOIUrl":"10.1016/j.wasman.2025.114821","url":null,"abstract":"<div><div>Sludge management in China faces critical environmental, economic, and technical challenges, necessitating urgent optimal management strategy selection. Given the limited number of comprehensive studies on sludge management, quantitative decision-making tools are urgently required. To address this gap, this study developed an integrated Analytic Hierarchy Process (AHP)–artificial neural network (ANN) model to evaluate sludge treatment scenarios. Four representative scenarios were evaluated based on carbon emissions, environmental impact, and economic costs. A hierarchical evaluation model based on the AHP was established for sludge treatment processes. Weight indicators were derived through expert questionnaire surveys and combined with empirical data to determine the comprehensive weights. The bootstrap method was applied to expand the sample size and ensure robust training of the ANN model. The ANN framework establishes mapping relationships between evaluation indicators and expected values. The AHP–ANN evaluation model demonstrated high predictive accuracy, achieving a maximum mean squared error (MSE) of 0.00052 in the test dataset. This model enabled the rapid assessment of parameter adjustments on evaluation outcomes and provided a quantitative basis for engineering optimization. Among the evaluated scenarios, the anaerobic digestion scenario (S1) demonstrated the best overall performance, characterized by low environmental impact and operational costs. Conversely, the incineration scenario (S3) exhibited the poorest overall performance, with high resource consumption, resulting in significant environmental impact and elevated operational costs.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"201 ","pages":"Article 114821"},"PeriodicalIF":7.1,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mercury flows in a cement plant adopting circular economy policies 采用循环经济政策的水泥厂内的汞流

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-04-18 DOI: 10.1016/j.wasman.2025.114808

Liang Yu Chen , Chia Chi Hsu , Chin Lung Lin , Ming Lun Lu , Hung Lin Chiang , Moo Been Chang

{"title":"Mercury flows in a cement plant adopting circular economy policies","authors":"Liang Yu Chen , Chia Chi Hsu , Chin Lung Lin , Ming Lun Lu , Hung Lin Chiang , Moo Been Chang","doi":"10.1016/j.wasman.2025.114808","DOIUrl":"10.1016/j.wasman.2025.114808","url":null,"abstract":"<div><div>The principle of recycling materials has been adopted as part of the cement industry’s contribution to the transition from linear to circular economy. This study examines mercury flow in a cement plant and investigates the impact of circular economy policies on mercury emissions. The raw material analysis indicate that steel industry sludge is the main mercury source (40.9 %), followed by limestone (23.0 %) and silica sand (13.4 %). Recycled materials, with a mercury content of 0.267 mg/kg, contribute more mercury than raw materials (0.065 mg/kg). The intermediates in the production process enrich mercury, with raw mill fly ash containing 19.7 mg/kg. Mercury output is primarily via flue gas (98.8 %), with a mass flow rate of 16.34 g/hr, while clinker accounts for only 1.1 %. The emission factor from the raw mill stack is 165 mg Hg/ton clinker, higher than those reported in previous studies. The mass balance is 130 %, within the acceptable range (70–130 %). While adopting circular economy policy is beneficial for waste management, it increases overall mercury emission from cement plants, necessitating improved recycled material quality and air pollution control measures.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"202 ","pages":"Article 114808"},"PeriodicalIF":7.1,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Long-term monitoring (2022–2024) of solid waste pollution in inland water ecosystems of Türkiye: Spatial and temporal dynamics 浙江内陆水生态系统固体废物污染长期监测（2022-2024）：时空动态

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-04-16 DOI: 10.1016/j.wasman.2025.114807

Koray Özşeker , Yahya Terzi , Kadir Seyhan

{"title":"Long-term monitoring (2022–2024) of solid waste pollution in inland water ecosystems of Türkiye: Spatial and temporal dynamics","authors":"Koray Özşeker , Yahya Terzi , Kadir Seyhan","doi":"10.1016/j.wasman.2025.114807","DOIUrl":"10.1016/j.wasman.2025.114807","url":null,"abstract":"<div><div>This study provides a comprehensive assessment of solid waste pollution in Türkiye’s inland water ecosystems, focusing on the Borçka, Muratlı, and Torul reservoirs, along with Uzungöl Lake, over a three-year period (2022–2024). By employing systematic seasonal sampling, geospatial analysis, and statistical evaluation, the research highlights the spatial and temporal dynamics of solid waste accumulation across these diverse aquatic systems. During the sampling period, a total of 52,666 solid waste items were collected and analyzed from Borçka Dam Lake (29,701 items), Muratlı Dam Lake (6,917 items), Torul Dam Lake (11,635 items), and Uzungöl (4,413 items), revealing significant variations in litter abundance among the lakes, seasons, and years, with Borçka Reservoir having the highest waste density and Uzungöl the lowest. Plastic waste emerged as the dominant category, accounting for over 60% of the total waste in all study sites, followed by metals, glass/ceramics, and paper/cardboard. Statistical analyses, including ANOVA, NMDS, and SIMPER, revealed distinct waste compositions across the lakes and seasons, emphasizing the need for targeted mitigation strategies. This research bridges a significant knowledge gap by focusing on long-term pollution dynamics in Türkiye’s inland waters, providing actionable insights for waste management and environmental conservation. Based on the findings of the study, it is recommended to implement effective waste management systems, introduce stricter regulations, and raise public awareness through targeted campaigns.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"201 ","pages":"Article 114807"},"PeriodicalIF":7.1,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sustainable enhancement of biochar and biochar composite properties through temperature-controlled pyrolysis of agricultural biomass and marble waste 通过温控热解农业生物质和大理石废物可持续提高生物炭和生物炭复合性能

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-04-15 DOI: 10.1016/j.wasman.2025.114799

Lorena Dornelas Marsolla , Gilberto Maia Brito , Jair C.C. Freitas , Edumar R. Cabral Coelho

{"title":"Sustainable enhancement of biochar and biochar composite properties through temperature-controlled pyrolysis of agricultural biomass and marble waste","authors":"Lorena Dornelas Marsolla , Gilberto Maia Brito , Jair C.C. Freitas , Edumar R. Cabral Coelho","doi":"10.1016/j.wasman.2025.114799","DOIUrl":"10.1016/j.wasman.2025.114799","url":null,"abstract":"<div><div>This study explores the utilization of cocoa pod husk, coconut shell, and marble waste as raw materials to prepare biochar and biochar/marble composites adsorbents. The influence of pyrolysis temperatures 500, 600, and 700 °C was evaluated to obtain more information about the thermal behavior of these adsorbents and to precisely engineer the physicochemical properties of biochar and its composites, facilitating the development of highly efficient and sustainable materials, while maximizing process efficiency and resource utilization. The adsorbent samples were analyzed using elemental analysis, surface area and porosity measurements, infrared spectroscopy, X-ray diffraction, scanning electron microscopy, thermogravimetry, and point of zero charge analysis. Results indicated that higher pyrolysis temperatures enhanced porosity, aromaticity, and surface functional groups. Increasing the temperature from 500 to 700 °C led to a decrease in biochar yields, with coconut biochar yields declining from 31.7 % to 28.5 % and cocoa biochar from 36.1 % to 31.2 %. In contrast, composite yields exceeded 50 % due to marble content. The addition of marble significantly improved the specific surface area (SSA) and porosity, with the SSA values of biochar ranging from 12.0 m<sup>2</sup> g<sup>−1</sup> to 29.1 m<sup>2</sup> g<sup>−1</sup> and the SSA of the biochar composite ranging from 47.3 m<sup>2</sup> g<sup>−1</sup> to 95.1 m<sup>2</sup> g<sup>−1</sup>. Ca(OH)<sub>2</sub> and MgO phases were identified on the surfaces of the biochar composites, demonstrating the capacity to facilitate cation exchange with adsorbates (e.g., herbicides), thereby enhancing the adsorption process. These properties contribute to the development of strategic, eco-friendly, and highly efficient adsorbent materials.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"201 ","pages":"Article 114799"},"PeriodicalIF":7.1,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient non-destructive recovery of LiFePO4 from spent lithium-Ion batteries for high-purity regeneration 从废锂离子电池中高效无损回收LiFePO4，实现高纯度再生

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-04-15 DOI: 10.1016/j.wasman.2025.114811

Tao Jiang , Yongyan Hu , Hongda Li , Xue Yuan , Zhixiang Tan , Kai Yue , Guangwen Zhang

{"title":"Efficient non-destructive recovery of LiFePO4 from spent lithium-Ion batteries for high-purity regeneration","authors":"Tao Jiang , Yongyan Hu , Hongda Li , Xue Yuan , Zhixiang Tan , Kai Yue , Guangwen Zhang","doi":"10.1016/j.wasman.2025.114811","DOIUrl":"10.1016/j.wasman.2025.114811","url":null,"abstract":"<div><div>Following mechanical shredding of spent lithium-ion batteries (LIBs), the complex composition of electrode materials hinders subsequent recycling. Thus, the separation of cathode and anode materials is a crucial step in the recycling process. The separation efficiency of cathode and anode materials under the two pretreatment methods of oxygen-free roasting and water soaking was analyzed by testing and calculation. Based on the different pyrolysis characteristics, the pretreatment process through oxygen-free roasting achieved high-purity separation, yielding anode and cathode materials with purities of 98.5 % and 93.3 %, respectively. By exploiting the water solubility differences of the binders, soaking the electrode sheets in water for 75 min followed by 40 KHz frequency ultrasonication for 1 min before sieving results in a purity of up to 98.7 % for the anode material and 98.1 % for the cathode material. Additionally, the anode material’s lithium leaching rate during water soaking separation is 82.9 %, supplying raw material for cathode repair and regeneration. Furthermore, the initial charge–discharge specific capacity of cathode material separated by water soaking is around 150 mAh/g after lithium replenishment, which is significantly higher than that of cathode material separated by oxygen-free calcination. A novel process for separating cathode and anode materials through water soaking and ultrasonic vibration was ultimately developed. This process not only enables the efficient separation of LiFePO<sub>4</sub> cathode materials but also facilitates their high-value regeneration. This method offers a scalable and environmentally sustainable approach to LIB recycling, with potential applications in industrial-scale battery material recovery.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"201 ","pages":"Article 114811"},"PeriodicalIF":7.1,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Socioeconomic factors explaining municipal solid waste generation in Galicia. Similarities and differences between aggregate magnitudes and fractions 解释加利西亚城市固体废物产生的社会经济因素。总量和分数之间的异同

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-04-14 DOI: 10.1016/j.wasman.2025.114794

Óscar Páramo-Telle, Xavier Vence

{"title":"Socioeconomic factors explaining municipal solid waste generation in Galicia. Similarities and differences between aggregate magnitudes and fractions","authors":"Óscar Páramo-Telle, Xavier Vence","doi":"10.1016/j.wasman.2025.114794","DOIUrl":"10.1016/j.wasman.2025.114794","url":null,"abstract":"<div><div>The rapid increase in Municipal Solid Waste (MSW) generation is a critical problem associated with economic development. Identifying the factors involved in MSW generation are key to designing strategies for responsible management and reduction. This study seeks to identify the factors involved in MSW generation and composition in Galicia (Spain). Multiple Linear Regression (MLR) analysis was used to study whether MSW generation was explained by increased disposable income per capita or other factors such as improved salaries, household consumption levels, improved Human Development Index (HDI) levels or an aging population. The models obtained add some interesting nuances to the existing literature. They present coefficients of determination (R<sup>2</sup>) higher than 0.77 for total MSW and all fractions, surpassing tests of linearity, homoscedasticity, normality of residuals and independence of variables. The results also add some important details to the existing literature, suggesting that MSW generation is linked more to economic growth than to consumption. The aging Galician population did not correlate with MSW reduction, but improved HDI correlated with a reduction in mixed urban waste.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"201 ","pages":"Article 114794"},"PeriodicalIF":7.1,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the growth and decline patterns and environmental drivers of pathogens during the stabilization process of simulated landfilling municipal solid waste 模拟填埋城市生活垃圾稳定化过程中病原菌的消长规律及环境驱动因素研究

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-04-13 DOI: 10.1016/j.wasman.2025.114791

Dongsheng Shen, Liya Su, Hening Ding, Yuyang Long, Cai Hui

{"title":"Study on the growth and decline patterns and environmental drivers of pathogens during the stabilization process of simulated landfilling municipal solid waste","authors":"Dongsheng Shen, Liya Su, Hening Ding, Yuyang Long, Cai Hui","doi":"10.1016/j.wasman.2025.114791","DOIUrl":"10.1016/j.wasman.2025.114791","url":null,"abstract":"<div><div>Waste and leachate in landfills are substantial reservoirs of pathogens, however information about the risk of pathogen contamination during the stabilization process under different landfill conditions is very limited. In this study, dynamic changes of culturable pathogens, bacteria community, and human bacterial pathogens (HBPs) during the stabilization process under different landfill conditions were investigated, and the environmental drivers were explored. Results showed that total coliforms, <em>Enterococcus</em>, and <em>Staphylococcus aureus</em> were the dominant pathogens detected in waste and leachate samples. During the landfill stabilization process, the concentration of culturable pathogens peaked at the hydrolysis-acidification stage (3.6 × 10<sup>5</sup> CFU·g<sup>−1</sup>) in the anaerobic condition, fluctuated from 4.18 × 10<sup>4</sup> to 5.35 × 10<sup>5</sup> CFU·g<sup>−1</sup> in the anaerobic leachate-recirculation condition, and kept rising (from 4.18 × 10<sup>4</sup> to 2.12 × 10<sup>6</sup> CFU·g<sup>−1</sup>) in the micro-aerobic condition. Moreover, HBPs abundance and diversity in the waste and leachate under micro-aerobic conditions were higher than those under the other two conditions, suggesting a higher risk of pathogen contamination. Sulfate and pH were significantly (<em>p</em> < 0.05) correlated with the composition of bacterial communities and HBPs, likely serving as the major environmental driving factors. Additionally, the interactions between HBPs and functional bacterial groups tended towards cooperative symbiotic relationships, with hydrolytic-acidogenic bacteria promoting the growth and proliferation of most pathogens. These findings will help to understand the changes and environmental drivers of pathogens during landfill stabilization, which will provide a theoretical basis for the risk prevention and control of pathogens in waste disposal.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"201 ","pages":"Article 114791"},"PeriodicalIF":7.1,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pyrolysis of mixed contaminated plastic wastes: Assessing the influence of polymers composition, temperature and residence time 混合污染塑料废弃物的热解：评估聚合物组成、温度和停留时间的影响

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-04-13 DOI: 10.1016/j.wasman.2025.114793

D. Sorino , P. de Vizia , M. Baldelli , L. Bartolucci , S. Cordiner , A. Falsetti , F. Lombardi , V. Mulone

{"title":"Pyrolysis of mixed contaminated plastic wastes: Assessing the influence of polymers composition, temperature and residence time","authors":"D. Sorino , P. de Vizia , M. Baldelli , L. Bartolucci , S. Cordiner , A. Falsetti , F. Lombardi , V. Mulone","doi":"10.1016/j.wasman.2025.114793","DOIUrl":"10.1016/j.wasman.2025.114793","url":null,"abstract":"<div><div>The European Union’s recycling objectives of 50 % for packaging by 2025 and 55 % by 2030 are still far from the current recycling rate of 37.8 %. Thermochemical recycling via pyrolysis might improve recovery rates, especially for challenging post-consumer dirty and contaminated plastics. Many studies focus on the pyrolysis of virgin plastics and artificial mixtures of these plastics to simulate real-world mixed plastic waste scenarios. This study examines a sample of pre-sorting waste from an Italian composting plant to represent real plastic mixtures within the collection chain. This waste contains plastics, organics, paper, and others, with plastics making up 72.18 % of the sample, primarily identified as LDPE, PP, and HDPE. The plastics were tested individually and as a mixture, mirroring the concentrations observed within the original sample, in a bench-scale semi-batch reactor at varying temperatures (420 °C, 470 °C, and 520 °C) and residence times. The analysis indicated that temperature and residence time considerably influence product yields and composition, although temperature has a more dominant effect. Wax analysis showed paraffins and olefins as the primary components, with a peak carbon number distribution in the C<sub>14</sub>-C<sub>19</sub> range at elevated temperatures. Contaminant analysis of wax identified substantial levels of halogens and metals, posing challenges for downstream processes. Results from the mixture tests revealed that the product yields of individual polymers could be predicted as a linear combination of their behaviors, with an accuracy within a 10 % margin of error across the examined temperature range and lower residence times.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"201 ","pages":"Article 114793"},"PeriodicalIF":7.1,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Facilitating anaerobic digestion of kitchen waste through diatomite-mediated spatial ecological niches construction 通过硅藻土介导的空间生态位构建促进餐厨垃圾厌氧消化

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-04-13 DOI: 10.1016/j.wasman.2025.114792

Dong Li , Tao Huang , Boran Wu , Chengxian Wang , Xiupeng Jiang , Sheng Huang , Xiaohu Dai , Xiaoli Chai

{"title":"Facilitating anaerobic digestion of kitchen waste through diatomite-mediated spatial ecological niches construction","authors":"Dong Li , Tao Huang , Boran Wu , Chengxian Wang , Xiupeng Jiang , Sheng Huang , Xiaohu Dai , Xiaoli Chai","doi":"10.1016/j.wasman.2025.114792","DOIUrl":"10.1016/j.wasman.2025.114792","url":null,"abstract":"<div><div>Anaerobic digestion (AD) presents an effective strategy for sustainable management of kitchen waste (KW), yet its widespread application remains constrained by suboptimal organic conversion efficiency and process instability. This study elucidates the critical role of diatomite (DE)-mediated spatial ecological niches construction in enhancing AD performance through microbial community regulation. Experimental results revealed that DE supplementation with optimal dosage of 10 g/L significantly improved methane production by 11.76 %, and maintained system stability through effective mitigation of volatile fatty acid accumulation and ammonia nitrogen inhibition. Further analysis demonstrated that DE served as an optimal surface for microbial attachment, enhancing biofilm formation and extracellular polymeric substance secretion, which in turn facilitated the selective enrichment and spatial organization of functional microbial communities. Microbial characterization showed that fermentative bacteria predominantly occupied the tightly-adsorbed community, while acetoclastic and hydrogenotrophic methanogens were enriched in the suspended community. Finally, the established ecological niches enhanced electron transfer and promoted syntrophic metabolism among methanogenesis-associated microorganisms. These findings provide mechanistic insights into material-mediated niche engineering strategies, establishing DE as an effective biofilm carrier for optimizing microbial resource utilization in AD systems.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"201 ","pages":"Article 114792"},"PeriodicalIF":7.1,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0