Waste management最新文献

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Comprehensive analysis of compost maturity differences across stages and materials with statistical models. 利用统计模型全面分析不同阶段和不同材料的堆肥成熟度差异。
IF 7.1 2区 环境科学与生态学
Waste management Pub Date : 2024-12-14 DOI: 10.1016/j.wasman.2024.12.011
Shang Ding, Donglei Wu
{"title":"Comprehensive analysis of compost maturity differences across stages and materials with statistical models.","authors":"Shang Ding, Donglei Wu","doi":"10.1016/j.wasman.2024.12.011","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.12.011","url":null,"abstract":"<p><p>Aerobic composting is an environmentally friendly and effective approach to treating organic solid waste. The variability in material composition introduces complex interactions between environmental factors and materials, which in turn affects compost maturity. This study uses multiple statistical analyses to systematically compare key indicators across composting processes for kitchen waste, livestock manure, and sludge. The results show that material type and composting stage have a significant impact on compost maturity (p < 0.001). High-precision modeling (R<sup>2</sup> > 0.90) was achieved using a Stacking model on the composting dataset, with interpretability analysis highlighting the important roles of temperature, moisture content, and nitrogen content across different composting materials. The combined effects of environmental and material changes jointly influence the composting progression. In kitchen waste composting, strong interactions between multiple indicators were observed, while moisture shifts in livestock manure and sludge composting primarily influenced compost maturity by promoting decomposition and enhancing nitrogen retention, respectively. Partial dependence analysis quantified the relationships between key indicators and compost maturity scores. These findings offer a scientific basis for identifying key factors and optimization paths in various composting processes, supporting the development of more effective composting strategies.</p>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"250-260"},"PeriodicalIF":7.1,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142829516","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
Assessment of co-pyrolysis of polyethylene terephthalate with waste cooking oil: Kinetic study and impact on the chemical constituents of the liquid product. 聚对苯二甲酸乙二醇酯与废食用油共热解的评估:动力学研究及其对液体产品化学成分的影响。
IF 7.1 2区 环境科学与生态学
Waste management Pub Date : 2024-12-13 DOI: 10.1016/j.wasman.2024.12.017
Mirele Santana Sá, Tarcísio Martins, Josué Alves Melo, Jhonattas de Carvalho Carregosa, Alberto Wisniewski
{"title":"Assessment of co-pyrolysis of polyethylene terephthalate with waste cooking oil: Kinetic study and impact on the chemical constituents of the liquid product.","authors":"Mirele Santana Sá, Tarcísio Martins, Josué Alves Melo, Jhonattas de Carvalho Carregosa, Alberto Wisniewski","doi":"10.1016/j.wasman.2024.12.017","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.12.017","url":null,"abstract":"<p><p>Post-consumer waste management systems have proven insufficient to meet the growing global demand. In this context, adopting alternative pathways that complement established practices, such as chemical recycling, becomes essential. Accordingly, this study evaluated the potential of the co-pyrolysis process to manage polyethylene terephthalate (PET) residues and waste cooking oil (WCO), converting them into industrial inputs. Three mixing ratios between PET and WCO were evaluated, assessing their synergistic effects through kinetic studies and comprehensive characterization of the final liquid product. The interaction between PET and WCO in the evaluated mixtures reduced the activation energy of thermal degradation by ∼ 40 % compared to raw PET, improving the energy viability of the process. The addition of WCO to the thermal conversion of PET favored the cracking of the polymer, thus the yield of the pyrolytic liquid increased from 44.41 % by weight to 59.38 % in the PW (2:1) mixture, 71.06 % in PW (1:1) and 79.86 % in PW (1:2). The synergistic interaction between the feedstocks led to an increase in terephthalic acid (TPA) production compared to the individual pyrolysis of PET. When PET and WCO were mixed in proportions of 2:1, 1:1, and 1:2, TPA production increased by 167 %, 73 % and 58 %, respectively. Moreover, the production of highly aromatic compounds was inhibited during co-pyrolysis, favoring the formation of less aromatic species. The results showed that the simultaneous management of wastes from co-pyrolysis offers advantages to the production process, presenting itself as a promising approach for the management and production of chemical inputs from PET and WCO.</p>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"237-249"},"PeriodicalIF":7.1,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142824523","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
Enhancing the sustainability of rubber materials: Dual benefits of wet mixing technology and recycled rubber's honeycomb reinforcement structure.
IF 7.1 2区 环境科学与生态学
Waste management Pub Date : 2024-12-12 DOI: 10.1016/j.wasman.2024.12.012
Maohui Wang, Zhanfu Yong
{"title":"Enhancing the sustainability of rubber materials: Dual benefits of wet mixing technology and recycled rubber's honeycomb reinforcement structure.","authors":"Maohui Wang, Zhanfu Yong","doi":"10.1016/j.wasman.2024.12.012","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.12.012","url":null,"abstract":"<p><p>The world's three leading tire manufacturers have proposed specific timelines for using recycled materials. For instance, Michelin targets an increase in the proportion of sustainable materials in tires to 40 % by 2030 and aims to produce 100 % of its tires from bio-based, renewable, or recyclable materials as of 2050. In such a context, this study introduced wet mixing technology to apply recycled rubber (RR) in highly wear-resistant tire tread compounds. This technique leverages the rubber's inherent crosslink density to enhance the mechanical performance of final products. The results indicated that wet mixing effectively addressed the high viscosity issue of RR. In the traditional dry mixing method, physical blending typically results in large particle sizes and suboptimal performance. In contrast, wet mixing reduced the rubber's hysteresis loss by 75 % and improved its rebound performance by 35.6 % at 23 °C, 60 °C, and 100 °C compared to traditional dry mixing. DIN volume abrasion was also reduced by 23.3 %. Remarkably, Akron abrasion nearly doubled its effect. Additionally, wet mixing regulated aggregate structure and formed a densely packed honeycomb-like structure within RR. Incorporating RR using wet mixing demonstrates noticeable advantages in carbon black/natural rubber/RR composite materials. This approach also presents a viable path to sustainable development in the rubber manufacturing industry.</p>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"190-198"},"PeriodicalIF":7.1,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142822215","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
Bacterial biofilm-based bioleaching: Sustainable mitigation and potential management of e-waste pollution. 基于细菌生物膜的生物浸出:电子废物污染的可持续缓解和潜在管理。
IF 7.1 2区 环境科学与生态学
Waste management Pub Date : 2024-12-12 DOI: 10.1016/j.wasman.2024.12.010
Krishnamurthy Mathivanan, Ruiyong Zhang, Jayaraman Uthaya Chandirika, Thangavel Mathimani, Can Wang, Jizhou Duan
{"title":"Bacterial biofilm-based bioleaching: Sustainable mitigation and potential management of e-waste pollution.","authors":"Krishnamurthy Mathivanan, Ruiyong Zhang, Jayaraman Uthaya Chandirika, Thangavel Mathimani, Can Wang, Jizhou Duan","doi":"10.1016/j.wasman.2024.12.010","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.12.010","url":null,"abstract":"<p><p>Significant advances in the electrical and electronic industries have increased the use of electrical and electronic equipment and its environmental emissions. The e-waste landfill disposal has deleterious consequences on human health and environmental sustainability, either directly or indirectly. E-waste containing ferrous and non-ferrous materials can harm the surrounding aquatic and terrestrial environments. Therefore, recycling e-waste and recovering metals from it before landfill disposal is an important part of environmental management. Although various chemical and physical processes are being used predominantly to recover metals from e-waste, the bioleaching process has gained popularity in recent years due to its eco-friendliness and cost-effectiveness. Direct contact between microbes and e-waste is crucial for continuous metal dissolution in the bio-leaching process. Biofilm formation is key for the continuous dissolution of metals from e-waste in contact bioleaching. Critical reviews on microbial activities and their interaction mechanisms on e-waste during metal bioleaching are scarce. Therefore, this review aims to explore the advantages and disadvantages of biofilm formation in contact bioleaching and the practical challenges in regulating them. In this review, sources of e-waste, available metallurgical methods, bioleaching process, and types of bioleaching microbes are summarized. In addition, the significance of biofilm formation in contact bioleaching and the role and correlation between EPS production, cyanide production, and quorum sensing in the biofilm are discussed for continuous metal dissolution. The review reveals that regulation of quorum sensing by exogenous and endogenous processes facilitates biofilm formation, leading to continuous metal dissolution in contact bioleaching.</p>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"221-236"},"PeriodicalIF":7.1,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142822201","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
Perceptions of value in retired smartphones: The role of monetary incentives in influencing end-of-hibernation decisions. 对退休智能手机价值的看法:货币激励在影响报废决定中的作用。
IF 7.1 2区 环境科学与生态学
Waste management Pub Date : 2024-12-12 DOI: 10.1016/j.wasman.2024.12.015
Mostafa Sabbaghi
{"title":"Perceptions of value in retired smartphones: The role of monetary incentives in influencing end-of-hibernation decisions.","authors":"Mostafa Sabbaghi","doi":"10.1016/j.wasman.2024.12.015","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.12.015","url":null,"abstract":"<p><p>Each year, a significant number of smartphones are retired, yet retained by consumers. These hibernating smartphones have the reuse potential for another lifecycle. Nonetheless, they often stay in storage for a long time and may ultimately face inadequate recovery. This study explores consumers' perceptions regarding the value of hibernating smartphones over time. It examines the influence of factors such as the duration of smartphone storage and monetary incentives on users' decision-making regarding the End-of-Hibernation (EoH). The findings demonstrate that, on average, participants perceive the value of a newly retired smartphone to be 28% higher than its market value. This perceived value increases to 83% after three years since the smartphone's retirement. Participants' tendency to keep a hibernating smartphone increases as the gap between the monetary incentive and their perceived value of the device increases. Conversely, the longer the smartphone stays in hibernation, the less inclined users are to keep it.</p>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"199-206"},"PeriodicalIF":7.1,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142822588","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
Hydrothermal pretreatment for enhanced thermochemical or biochemical conversion of pharmaceutical biowastes into fuels, fertilizers, and carbon materials. 通过水热预处理,加强制药生物废料向燃料、肥料和碳材料的热化学或生物化学转化。
IF 7.1 2区 环境科学与生态学
Waste management Pub Date : 2024-12-12 DOI: 10.1016/j.wasman.2024.12.007
Yilin Wei, Xiang Meng, Weiyuan Meng, Lijian Leng, Zhiyong Zeng, Xinming Wang, Shengqiang Liu, Hao Zhan
{"title":"Hydrothermal pretreatment for enhanced thermochemical or biochemical conversion of pharmaceutical biowastes into fuels, fertilizers, and carbon materials.","authors":"Yilin Wei, Xiang Meng, Weiyuan Meng, Lijian Leng, Zhiyong Zeng, Xinming Wang, Shengqiang Liu, Hao Zhan","doi":"10.1016/j.wasman.2024.12.007","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.12.007","url":null,"abstract":"<p><p>Pharmaceutical biowastes, rich in organic matter and high in moisture, are typical light industry byproducts with waste and renewable attributes. Thermochemical and biochemical conversion technologies transform these residues into value-added bioproducts, including biofuels, biofertilizers, and bio-carbon materials. Hydrothermal pretreatment effectively removes toxic substances and enhances feedstock for these processes. This review comprehensively examines its role in improving the formation of bioproducts from pharmaceutical biowastes, focusing on (i) upgrading and denitrogenating solid biofuels with better combustion performance; (ii) enhancing biodegradability and gaseous biofuel production via organic matter decomposition; (iii) enriching soluble carbon and nitrogen for liquid biofertilizer; (iv) eliminating antibiotic residues and reducing antibiotic resistance in solid biofertilizers; and (v) stabilizing carbon and nitrogen structures and optimizing pore characteristics for functionalized carbon materials. The review recommends a potential staged thermochemical approach to co-produce nitrogen-enriched liquid biofertilizers and porous carbon materials from pharmaceutical biowastes. Hydrothermal pretreatment emerges as a key technique for facilitating the migration and conversion of essential elements like carbon and nitrogen. This study reveals the potential of hydrothermal pretreatment to address the limitations of pharmaceutical biowastes and offers insights into their valorization.</p>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"207-220"},"PeriodicalIF":7.1,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142822566","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
Steam explosion pretreatment of separated dairy cattle manure: Mass balances and effect on biomethane potential.
IF 7.1 2区 环境科学与生态学
Waste management Pub Date : 2024-12-11 DOI: 10.1016/j.wasman.2024.11.037
Elisabeth Anne Cazier, Simone Brethauer, Patrice Claude Bühler, Michael Hans-Peter Studer
{"title":"Steam explosion pretreatment of separated dairy cattle manure: Mass balances and effect on biomethane potential.","authors":"Elisabeth Anne Cazier, Simone Brethauer, Patrice Claude Bühler, Michael Hans-Peter Studer","doi":"10.1016/j.wasman.2024.11.037","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.11.037","url":null,"abstract":"<p><p>Manure is a renewable feedstock, whose theoretical potential for biogas production is scarcely deployed due to modest methane yields that prevent economic feasible operation of anaerobic digestion plants. Steam explosion pretreatment has the potential to improve the digestibility of manure, however it is energy intensive, and the optimal conditions depend on the feedstock. In this work, the solid and the liquid fraction of separated dairy cattle manure were pretreated between 130 and 210 °C for 5 to 40 min by steam explosion to individually determine the optimal conditions for each fraction. Additionally, mass balances for volatile solids (VS), cellulose, hemicellulose and proteins were performed to better understand the effects of the pretreatment. For the manure solids, a pretreatment at 130 °C for 20 min was most effective, the biomethane potential (BMP) improved by 40 %. In contrast, the BMP of the liquid fraction could not be improved at any pretreatment condition. The mass balances showed that at more severe conditions up to 18 % of the VS were lost by decomposition and/or evaporation, with the proteins being the most thermolabile fraction. Based on the observation, that a pretreatment of the liquid phase can be omitted, a heat integrated plant concept is suggested where the necessary heat input is only as large as in conventional anaerobic digestion. Taken together, this work underlined the benefits of steam explosion pretreatment of manure and identified the prevention of VS loss as a promising avenue for further improving the process.</p>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"180-189"},"PeriodicalIF":7.1,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142819193","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 electricity-powered future for mixed plastic waste chemical recycling.
IF 7.1 2区 环境科学与生态学
Waste management Pub Date : 2024-12-10 DOI: 10.1016/j.wasman.2024.12.003
Stavros A Theofanidis, Evangelos Delikonstantis, Vasileia-Loukia Yfanti, Vladimir V Galvita, Angeliki A Lemonidou, Kevin Van Geem
{"title":"An electricity-powered future for mixed plastic waste chemical recycling.","authors":"Stavros A Theofanidis, Evangelos Delikonstantis, Vasileia-Loukia Yfanti, Vladimir V Galvita, Angeliki A Lemonidou, Kevin Van Geem","doi":"10.1016/j.wasman.2024.12.003","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.12.003","url":null,"abstract":"<p><p>In contemporary times, global plastic waste production has doubled in comparison to two decades ago, with only 9% effectively recycled. The polymer industry is undergoing a transition to address the disparity between plastic production and end-of-life waste management. Chemical recycling offers a solution by converting plastic waste into its constituent building blocks, or monomers, which can be utilized in the production of new, high-quality plastics. This concise review provides an overview of conventional chemical recycling technologies employing heated reactors, before delving into ongoing efforts towards electrifying the chemical recycling process. A conceptual framework for a fully electrified value chain aimed at achieving plastics circularity is outlined and analyzed. Additionally, attention is given to the challenges posed by industry inertia towards adopting electrified technologies, as well as performance issues stemming from the intermittent nature of renewable energy sources and the availability of long-duration renewable electricity storage options.</p>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"155-170"},"PeriodicalIF":7.1,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142814477","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
Enhancing mesophilic methanogenesis in oleate-rich environments through optimized micro-aeration pretreatment.
IF 7.1 2区 环境科学与生态学
Waste management Pub Date : 2024-12-10 DOI: 10.1016/j.wasman.2024.12.005
Xiang Li, Yi-Juan Yan, Hong-Ming Wu, Samir Ibrahim Gadow, Hongyu Jiang, Zhe Kong, Yong Hu
{"title":"Enhancing mesophilic methanogenesis in oleate-rich environments through optimized micro-aeration pretreatment.","authors":"Xiang Li, Yi-Juan Yan, Hong-Ming Wu, Samir Ibrahim Gadow, Hongyu Jiang, Zhe Kong, Yong Hu","doi":"10.1016/j.wasman.2024.12.005","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.12.005","url":null,"abstract":"<p><p>Micro-aeration pretreatment has emerged as a promising technology for improving the performance of anaerobic bioreactors in the treatment of lipid-rich organic waste, particularly in mitigating the accumulation of long-chain fatty acids (LCFAs). Micro-aeration intensity is a critical factor in optimizing substrate hydrolysis and methanogenesis efficiency. In this study, optimal micro-aeration intensities for acetoclastic (30 mL-air/g-COD) and overall methanogenesis (7.5 mL-air/g-COD) were initially determined using acetate and glucose as substrates, respectively. Subsequently, the addition of 0.5 mM oleate (a typical LCFA) increased cumulative methane production by 22.1 % when acetate was used as the substrate after 30 mL-air/g-COD micro-aeration pretreatment. Conversely, it decreased cumulative methane production by 17.3 % when glucose was used as the substrate after 7.5 mL-air/g-COD micro-aeration pretreatment. Additionally, the population of facultative hydrolysis microorganisms, such as the genus Pseudomonas, increased by 25.7 % and 27.8 % when acetate and glucose were used as substrates, respectively. Furthermore, the predominant methane-producing archaea, including the genus Methanosarcina, increased by 27.3 % when acetate was used as the substrate, while the genus Methanosaeta decreased by 65.3 % when glucose was used as the substrate. Collectively, these findings provide insights into the methanogenesis pathway under optimal micro-aeration pretreatment conditions, guiding future research in this field.</p>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"171-179"},"PeriodicalIF":7.1,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142814478","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
Selective leaching and recovery of phosphorus from incinerated sewage sludge ash with CaO addition.
IF 7.1 2区 环境科学与生态学
Waste management Pub Date : 2024-12-10 DOI: 10.1016/j.wasman.2024.12.006
Zhonghua Yang, Chuanming Du, Ruiyuan Yuan, Haixin Guo
{"title":"Selective leaching and recovery of phosphorus from incinerated sewage sludge ash with CaO addition.","authors":"Zhonghua Yang, Chuanming Du, Ruiyuan Yuan, Haixin Guo","doi":"10.1016/j.wasman.2024.12.006","DOIUrl":"https://doi.org/10.1016/j.wasman.2024.12.006","url":null,"abstract":"<p><p>Incinerated sewage sludge ash (ISSA) with high P<sub>2</sub>O<sub>5</sub> content is a potential phosphorus resource that can replace the non-renewable phosphorus rocks. However, extracting phosphorus from ISSA using hydrometallurgical methods also dissolves a large amount of impurity metals into the leachate. Therefore, this study proposes a new method combining high-temperature reaction with CaO addition, selective leaching, and chemical precipitation for efficient and low-cost phosphorus recovery from ISSA. During thermal treatment at 1050 °C, the addition of CaO significantly influenced the types and amounts of phosphate mineral phases in ISSA. When 20 % CaO was added, the Al/Fe-phosphate phases were completely converted into acid-soluble Ca-phosphate phases, while Al and Fe were retained in acid-insoluble phases (e.g., Al- and Fe-containing oxides and silicates). Subsequently, by controlling the pH of acidic leachate (2.0 to 1.5), Ca-phosphate phases were selectively dissolved. At a pH of 1.5, better selective leaching was achieved, with a leaching efficiency of 94.71 % for P and less than 10 % for Al, Fe and Si. The XRF results showed that the majority of SiO<sub>2</sub> (38.39 %), Al<sub>2</sub>O<sub>3</sub> (33.26 %) remained in the post-leaching solid residue, which was expected to be further resource utilization. Without purification treatment to remove Al, Fe and Si, almost all phosphate ions were precipitated at pH = 8.5, with P recovery efficiency of 94.07 %. XRD results showed that the precipitate was mainly composed of HAP, with a P<sub>2</sub>O<sub>5</sub> content of 37.51 % and low level of contaminants, thereby realizing the effective recovery of phosphorus from ISSA.</p>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"193 ","pages":"143-154"},"PeriodicalIF":7.1,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142814487","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
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