Waste management最新文献_第10页

Pyrolysis-induced migration and transformation of heavy metals in sewage sludge containing microplastics 热解诱导含有微塑料的污水污泥中重金属的迁移和转化。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-09-05 DOI: 10.1016/j.wasman.2024.08.039

Xinyi Chang , Pengfei Wu , Yaozhu Chu , Ying Zhou , Yuanyuan Tang

{"title":"Pyrolysis-induced migration and transformation of heavy metals in sewage sludge containing microplastics","authors":"Xinyi Chang , Pengfei Wu , Yaozhu Chu , Ying Zhou , Yuanyuan Tang","doi":"10.1016/j.wasman.2024.08.039","DOIUrl":"10.1016/j.wasman.2024.08.039","url":null,"abstract":"<div><p>Stabilizing heavy metals (HMs) in sewage sludge is urgently needed to facilitate its recycling and reuse. Pyrolysis stands out as a promising method for not only stabilizing these metals but also producing biochar. Our research delves into the migration and transformation of specific HMs (Cr, Mn, Ni, Cu, Zn, As, and Pb) during co-pyrolysis under various conditions, including the presence and absence of microplastics (PVC and PET). We examined different concentrations of these plastics (1 %, 5 %, 10 %, and 15 %) and temperatures (300 °C, 500 °C, and 700 °C). Findings reveal that microplastics, particularly PVC, enhance the migration of Zn and Mn, leading to significant volatilization of Zn and Pb at higher temperatures, peaking at 700 °C. The increase in temperature also markedly influences HM migration, with As showcasing notable loss rates that climbed by 18.0 % and 16.3 % in systems with PET and PVC, respectively, as temperatures soared from 300 °C to 700 °C. Moreover, our speciation analysis indicates that microplastics aid in transforming certain HMs from unstable to more stable forms, suggesting their beneficial role in HM stabilization during pyrolysis. This study significantly enriches our understanding of microplastics’ impact on HM behavior in sewage sludge pyrolysis, offering new avenues for pollution control and environmental management strategies.</p></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"189 ","pages":"Pages 401-409"},"PeriodicalIF":7.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142146432","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

Speciation of copper and zinc compounds relevant for the hazard property (HP) 14 classification of municipal solid waste incineration bottom and fly ashes 与城市固体废物焚烧底部和飞灰的危险特性 (HP) 14 分类有关的铜和锌化合物的规格。

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-09-05 DOI: 10.1016/j.wasman.2024.09.001

Philipp Scholz , Christian Vogel , Götz Schuck , Franz-Georg Simon

{"title":"Speciation of copper and zinc compounds relevant for the hazard property (HP) 14 classification of municipal solid waste incineration bottom and fly ashes","authors":"Philipp Scholz , Christian Vogel , Götz Schuck , Franz-Georg Simon","doi":"10.1016/j.wasman.2024.09.001","DOIUrl":"10.1016/j.wasman.2024.09.001","url":null,"abstract":"<div><p>The analysis of the presence and content of substances that are toxic to aquatic life in waste is essential for classification of waste with regard to hazard property (HP) 14 ‘ecotoxic’. For the determination of HP14 classified copper (Cu) and zinc (Zn) compounds in various municipal solid waste incineration bottom ashes (IBA) and one fly ash (FA) from Germany we applied X-ray absorption near-edge structure (XANES) spectroscopy in combination with linear combination fitting. The analysis showed that approx. 50–70% of Cu in the IBA are Cu(I) compounds and elemental Cu(0), but these compounds were not equally distributed in the different IBA. In contrast, the majority (approx. 50–70%) of Zn in all IBA is elemental zinc, which originates from brass or other alloys and galvanized metals with a large content of zinc in the waste. The FA contain higher mass fraction on Zn and other toxic elements, but similar Cu and Zn species. Additional performed selective extraction at a pH of 4 with an organic acid of some IBA showed that the ecotoxic Zn fraction is mainly elemental zinc and zinc oxide. In contrast, for the ecotoxic Cu fraction within the IBA no specific compound could be identified. Furthermore, the XANES analysis showed that the HP14 properties of especially Cu in IBA is overestimated with current best-practice guidelines for sample processing for the current substance-related approach with the 0.1% cut-off rule for each substance. However, it should be considered whether it would not be better from an environmental point of view to take the ecotoxicologically leachable copper and zinc as a reference value.</p></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"189 ","pages":"Pages 421-426"},"PeriodicalIF":7.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0956053X24004744/pdfft?md5=6474b11412d8e091e66a91cce8497348&pid=1-s2.0-S0956053X24004744-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142146433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the chemistry of waste eggshells and its diverse applications 探索废弃蛋壳的化学性质及其多样化应用

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-09-04 DOI: 10.1016/j.wasman.2024.08.024

Laiba Iftikhar , Iqbal Ahmad , Muhammad Saleem , Aamir Rasheed , Amir Waseem

{"title":"Exploring the chemistry of waste eggshells and its diverse applications","authors":"Laiba Iftikhar , Iqbal Ahmad , Muhammad Saleem , Aamir Rasheed , Amir Waseem","doi":"10.1016/j.wasman.2024.08.024","DOIUrl":"10.1016/j.wasman.2024.08.024","url":null,"abstract":"<div><p>The large-scale production of chicken eggs results in a substantial amount of eggshell (ES) residue, often considered as waste. These discarded shells naturally decompose in soil approximately within a year. Eggshells (ES), comparatively contribute lesser towards environmental pollution, contain a remarkable amount of calcium, which can be converted into various valuable products that finds applications in industries, pharmaceuticals, and medicine. Among the diverse applications of ES, most effective and promising applications are removal of heavy metals (Cd, Cr, Pb, Zn, and Cu) ∼93–99 % metal adsorption capacity and capturing of flue gases (CO<sub>2</sub> and SO<sub>2</sub>) from the environment. With ES having a maximum CO<sub>2</sub> sorption capacity of 92 % as compared to other sources, and SO<sub>2</sub> adsorption capacity of Calcined ES∼11.68 mg/g. The abundance, low cost and easy availability of CaO from ES makes them sustainable and eco-friendly. Additionally, its versatility extends beyond environmental prospects, as it is widely used in various industries as a catalyst, sorbent, fertilizer, and calcium supplement in food for individuals, plants and animals, among other diverse fields of study. Owing to its versatile applications, current review focuses on structure, chemical composition, treatment methods, and valorization pathways for diverse applications, aiming to reduce the eggshells waste and mitigate environmental pollution.</p></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"189 ","pages":"Pages 348-363"},"PeriodicalIF":7.1,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142137243","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 of LFG bubble accumulation and discontinuous flow in the highly saturated region of landfill below the leachate level 垃圾填埋场渗滤液液面以下高饱和度区域的垃圾填埋气泡积聚和不连续流动研究

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-09-04 DOI: 10.1016/j.wasman.2024.08.030

Qi-Teng Zheng , Jin-Shui Ju , Wen-Ding Fu , Shi-Jin Feng , Jun Wang

{"title":"Study of LFG bubble accumulation and discontinuous flow in the highly saturated region of landfill below the leachate level","authors":"Qi-Teng Zheng , Jin-Shui Ju , Wen-Ding Fu , Shi-Jin Feng , Jun Wang","doi":"10.1016/j.wasman.2024.08.030","DOIUrl":"10.1016/j.wasman.2024.08.030","url":null,"abstract":"<div><p>Landfills in developing countries are typically characterized by high waste water content and elevated leachate levels. Despite the ongoing biodegradation of waste in the highly saturated regions of these landfills, which leads to gas accumulation and bubble formation, the associated gas pressure that poses a risk to landfill stability is often overlooked. This paper introduces a landfill gas (LFG) bubble generation model and a two-fluid model that considers bubble buoyancy and porous medium resistance. The entire process can be divided into two stages based on the force balance and velocity of bubbles: Bubble Development Stage and the Two-Fluid Flow Stage. The models were validated using a one-dimensional analytical solution of hydraulic distribution that considers bubble generation, as well as an experiment involving air injection into a saturated medium. The mechanisms of LFG accumulation and ascent, leachate level rise, and discontinuous leachate-gas flow were then investigated in conjunction with continuous flow in the unsaturated region. The results indicate that the generation of LFG bubbles below the leachate level can cause a rise in the level height of more than 20%. During the Bubble Development Stage, there is a critical height for bubble ascent, above which the buoyancy exceeds the combined forces of gravity and resistance, resulting in less than 10% of bubbles continuously flowing into the unsaturated zone for recovery. The developed model effectively captures the accumulation and flow of LFG bubbles below the leachate level and could be further utilized to study leachate-gas pumping in the future.</p></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"189 ","pages":"Pages 334-347"},"PeriodicalIF":7.1,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142137245","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

Upcycling biowaste into advanced carbon materials via low-temperature plasma hybrid system: applications, mechanisms, strategies and future prospects 通过低温等离子体混合系统将生物废弃物升级再造为先进碳材料：应用、机理、策略和未来展望

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-09-04 DOI: 10.1016/j.wasman.2024.08.036

Fanghua Li , Gaotingyue Li , Bachirou Guene Lougou , Qiaoqiao Zhou , Boshu Jiang , Yong Shuai

{"title":"Upcycling biowaste into advanced carbon materials via low-temperature plasma hybrid system: applications, mechanisms, strategies and future prospects","authors":"Fanghua Li , Gaotingyue Li , Bachirou Guene Lougou , Qiaoqiao Zhou , Boshu Jiang , Yong Shuai","doi":"10.1016/j.wasman.2024.08.036","DOIUrl":"10.1016/j.wasman.2024.08.036","url":null,"abstract":"<div><p>This review focuses on the recent advances in the sustainable conversion of biowaste to valuable carbonaceous materials. This study summarizes the significant progress in biowaste-derived carbon materials (BCMs) via a plasma hybrid system. This includes systematic studies like AI-based multi-coupling systems, promising synthesis strategies from an economic point of view, and their potential applications towards energy, environment, and biomedicine. Plasma modified BCM has a new transition lattice phase and exhibits high resilience, while fabrication and formation mechanisms of BCMs are reviewed in plasma hybrid system. A unique 2D structure can be designed and formulated from the biowaste with fascinating physicochemical properties like high surface area, unique defect sites, and excellent conductivity. The structure of BCMs offers various activated sites for element doping and it shows satisfactory adsorption capability, and dynamic performance in the field of electrochemistry. In recent years, many studies have been reported on the biowaste conversion into valuable materials for various applications. Synthesis methods are an indispensable factor that directly affects the structure and properties of BCMs. Therefore, it is imperative to review the facile synthesis methods and the mechanisms behind the formation of BCMs derived from the low-temperature plasma hybrid system, which is the necessity to obtain BCMs having desirable structure and properties by choosing a suitable synthesis process. Advanced carbon–neutral materials could be widely synthesized as catalysts for application in environmental remediation, energy conversion and storage, and biotechnology.</p></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"189 ","pages":"Pages 364-388"},"PeriodicalIF":7.1,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142137244","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

Estimation of the uncertainty of metal content in a batch of waste printed circuit boards from computer motherboards 估算一批电脑主板废印刷电路板中金属含量的不确定性

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-09-03 DOI: 10.1016/j.wasman.2024.08.010

Solène Touzé , Agathe Hubau , Jean-Philippe Ghestem , Pauline Moreau , Nicolas Lafaurie , Johanna Noireaux

{"title":"Estimation of the uncertainty of metal content in a batch of waste printed circuit boards from computer motherboards","authors":"Solène Touzé , Agathe Hubau , Jean-Philippe Ghestem , Pauline Moreau , Nicolas Lafaurie , Johanna Noireaux","doi":"10.1016/j.wasman.2024.08.010","DOIUrl":"10.1016/j.wasman.2024.08.010","url":null,"abstract":"<div><p>Electronic wastes are a valuable resource due to their critical and precious metal content. To include these wastes in recycling or recovery chains, it is necessary to precisely determine their metal content. Because analysing the whole sample of a batch of electronic waste is not practical, different preparation and sampling or subsampling steps are necessary. Sampling induces an error in the composition of the final sample compared to that of the initial batch, which finally leads to uncertainty in the final metal content measurement as compared to the “actual” batch metal content. The aim was to characterize the uncertainty in metal content of a batch of 372 kg of WPCB. Thirty-nine metals were analysed and thirty-two were considered: base, precious, rare-earths and critical metals. An empirical method (i.e. replicated measurement tests) was thus applied, based on statistical calculations according to Eurachem Guidelines. Uncertainty arising during the 3 different stages of the preparation process (primary, secondly and tertiary sampling steps) was calculated. For the analysed given weight (0.5 g), the shredding efficiency, which directly affects metal particle size distribution, was found to be the most important factor influencing the uncertainty. Uncertainties in base metal content, which is often concentrated in the coarsest particles, arose mainly from the last preparation step (tertiary sampling). Conversely, precious metals and rare-earths were finely ground during the 3 preparation steps, which led to low uncertainties, despite their low concentration in the waste (<337 mg/t for precious and < 35 mg/t for rare-earths).</p></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"189 ","pages":"Pages 325-333"},"PeriodicalIF":7.1,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142128888","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

Optimizing the greenhouse gas emissions of waste transfer and transport: An integration of life cycle assessment and vehicle routing problem 优化废物转移和运输的温室气体排放：生命周期评估与车辆路线问题的整合

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-09-02 DOI: 10.1016/j.wasman.2024.08.034

Nanlin Liao , Fan Lü , Hua Zhang , Pinjing He

{"title":"Optimizing the greenhouse gas emissions of waste transfer and transport: An integration of life cycle assessment and vehicle routing problem","authors":"Nanlin Liao , Fan Lü , Hua Zhang , Pinjing He","doi":"10.1016/j.wasman.2024.08.034","DOIUrl":"10.1016/j.wasman.2024.08.034","url":null,"abstract":"<div><p>This study presents a comprehensive analysis of greenhouse gas (GHG) emissions associated with waste transfer and transport, incorporating derived leachate treatment—a factor often overlooked in existing research. Employing an integration model of life cycle assessment and a vehicle routing problem (VRP) methods, we evaluated the GHG reduction potential of waste transfer and transport system. Two Chinese counties with different topographies and demographics were selected, yielding 80 scenarios that factored in waste source separation as well as vehicle capacity, energy sources, and routes. The functional unit (FU) is transferring and transporting 1 tonne waste and treating derived leachate. The GHG emissions varied from 12 to 39 kg CO<sub>2</sub> equivalent per FU. Waste source separation emerged as the most impactful mitigation strategy, not only for the studied system but for an integrated waste management system. Followings are the use of larger capacity vehicles and electrification of the vehicles. These insights are instrumental for policymakers and stakeholders in optimizing waste management systems to reduce GHG emissions.</p></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"189 ","pages":"Pages 314-324"},"PeriodicalIF":7.1,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122089","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

Exposing the pitfalls of plastics mechanical recycling through cost calculation 通过成本计算揭示塑料机械回收的陷阱

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-09-02 DOI: 10.1016/j.wasman.2024.08.017

Nicola Van Camp , Irdanto Saputra Lase , Steven De Meester , Sophie Hoozée , Kim Ragaert

{"title":"Exposing the pitfalls of plastics mechanical recycling through cost calculation","authors":"Nicola Van Camp , Irdanto Saputra Lase , Steven De Meester , Sophie Hoozée , Kim Ragaert","doi":"10.1016/j.wasman.2024.08.017","DOIUrl":"10.1016/j.wasman.2024.08.017","url":null,"abstract":"<div><p>The plastic industry needs to match the recycling goals set by the EU. Next to technological hurdles, the cost of plastics mechanical recycling is an important modality in this transition. This paper reveals how business economic cost calculation can expose significant pitfalls in the recycling process, by unravelling limitations and boundary conditions, such as scale. By combining the business economic methodology with a Material Flow Analysis, this paper shows the influence of mass retention of products, the capacity of the processing lines, scaling of input capacity, and waste composition on the recycling process and associated costs. Two cases were investigated: (i) the Initial Sorting in a medium size Material Recovery Facility and (ii) an improved mechanical recycling process for flexibles − known as the Quality Recycling Process − consisting of Additional Sorting and Improved Recycling. Assessing the whole recycling chain gives a more holistic insight into the influences of choices and operating parameters on subsequent costs in other parts of the chain and results in a more accurate cost of recycled plastic products. This research concluded that the cost of Initial Sorting of flexibles is 110,08–122,53 EUR/t, while the cost of subsequent Additional Sorting and Improved Recycling ranges from 566,26 EUR/t for rPE Flex to 735,47 EUR/t for rPP Film, these insights can be used to determine a fair price for plastic products. For the Quality Recycling Process it was shown that rationalisation according to the identified pitfalls can reduce the cost per tonne of product by 15–26%.</p></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"189 ","pages":"Pages 300-313"},"PeriodicalIF":7.1,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0956053X24004513/pdfft?md5=6d6a5d4d534e4bf7926706ca567cc524&pid=1-s2.0-S0956053X24004513-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of greenhouse gas emission and reduction potential of high-food-waste-content municipal solid waste landfills: A case study of a landfill in the east of China 高厨余垃圾填埋场温室气体排放及减排潜力评估：中国东部垃圾填埋场案例研究

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-09-01 DOI: 10.1016/j.wasman.2024.08.029

Yufan Wei , Wenjie Xu , Yunmin Chen , Yi Peng , Han Ke , Liangtong Zhan , Jiwu Lan , He Li , Yuxiang Zhang

{"title":"Evaluation of greenhouse gas emission and reduction potential of high-food-waste-content municipal solid waste landfills: A case study of a landfill in the east of China","authors":"Yufan Wei , Wenjie Xu , Yunmin Chen , Yi Peng , Han Ke , Liangtong Zhan , Jiwu Lan , He Li , Yuxiang Zhang","doi":"10.1016/j.wasman.2024.08.029","DOIUrl":"10.1016/j.wasman.2024.08.029","url":null,"abstract":"<div><p>This study proposes a comprehensive evaluation method based on a two-stage model to assess greenhouse gas (GHG) emissions and reductions in high-food-waste-content (HFWC) municipal solid waste (MSW) landfills. The proposed method considers typical processes such as fugitive landfill gas (LFG), LFG collection, flaring, power generation, and leachate treatment. A case study of an HFWC MSW landfill in eastern China is considered to illustrate the evaluation. The findings revealed that the GHG emissions equivalent of the case landfill amounted to 21.23 million tons from 2007 to 2022, averaging 1.03 tons CO<sub>2</sub>-eq per ton of MSW. There was a potential underestimation of LFG generation at the landfill site during the initial stages, which led to delayed LFG collection and substantial fugitive LFG emissions. Additionally, the time distribution of GHG emissions from HFWC MSW was significantly different from that of low-food-waste-content (LFWC) MSW landfills, with peak emissions occurring much earlier. Owing to the rapid degradation characteristics of HFWC MSW, the cumulative LFG production of the landfill by 2022 (2 years after the final cover) was projected to reach 77 % of the total LFG potential. In contrast, it would take until 2030 for LFWC MSW landfills to reach this level. Furthermore, various scenarios were analyzed, in which if the rapid LFG generation characteristics of HFWC MSW are known in advance, and relevant facilities are constructed ahead of time, the collection efficiency can be improved from 31 % to over 78 %, resulting in less GHG emissions.</p></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"189 ","pages":"Pages 290-299"},"PeriodicalIF":7.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142117585","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

High-solid digestion – A comparison of completely stirred and plug-flow reactor systems 高固体消化 - 完全搅拌式和塞流式反应器系统的比较

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2024-08-31 DOI: 10.1016/j.wasman.2024.08.025

Ebba Perman , Anna Karlsson , Maria Westerholm , Simon Isaksson , Anna Schnürer

{"title":"High-solid digestion – A comparison of completely stirred and plug-flow reactor systems","authors":"Ebba Perman , Anna Karlsson , Maria Westerholm , Simon Isaksson , Anna Schnürer","doi":"10.1016/j.wasman.2024.08.025","DOIUrl":"10.1016/j.wasman.2024.08.025","url":null,"abstract":"<div><p>High-solid digestion (HSD) for biogas production is a resource-efficient and sustainable method to treat organic wastes with high total solids content and obtain renewable energy and an organic fertiliser, using a lower dilution rate than in the more common wet digestion process. This study examined the effect of reactor type on the performance of an HSD process, comparing plug-flow (PFR) type reactors developed for continuous HSD processes, and completely stirred-tank reactors (CSTRs) commonly used for wet digestion. The HSD process was operated in thermophilic conditions (52 °C), with a mixture of household waste, garden waste and agricultural residues (total solids content 27–28 %). The PFRs showed slightly better performance, with higher specific methane production and nitrogen mineralisation than the CSTRs, while the reduction of volatile solids was the same in both reactor types. Results from 16S rRNA gene sequencing showed a significant difference in the microbial population, potentially related to large differences in stirring speed between the reactor types (1 rpm in PFRs and 70–150 rpm in CSTRs, respectively). The bacterial community was dominated by the genus <em>Defluviitoga</em> in the PFRs and order MBA03 in the CSTRs. For the archaeal community, there was a predominance of the genus <em>Methanoculleus</em> in the PFRs, and of the genera <em>Methanosarcina</em> and <em>Methanothermobacter</em> in the CSTRs. Despite these shifts in microbiology, the results showed that stable digestion of substrates with high total solids content can be achieved in both reactor types, indicating flexibility in the choice of technique for HSD processes.</p></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"189 ","pages":"Pages 265-275"},"PeriodicalIF":7.1,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0956053X24004574/pdfft?md5=20130ddfcfd1bc5c2f4936ab6a59420b&pid=1-s2.0-S0956053X24004574-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0