Waste Management Bulletin最新文献_第9页

A sustainable approach to helminth eggs concentrations removal in sewage sludge from biological wastewater treatment: A Brazilian case study 生物废水处理中去除污泥中蠕虫卵浓度的可持续方法：巴西案例研究

Waste Management Bulletin

Pub Date : 2025-09-01 Epub Date: 2025-07-25 DOI: 10.1016/j.wmb.2025.100232

Guilherme Sgobbi Zagui , Lisandro Simão , Danielma Silva Maia , Brisa Maria Fregonesi , Karina Aparecida Abreu Tonani , Marília Vasconcellos Agnesini , Cristina Filomena Pereira Rosa Paschoalato , Susana Inés Segura-Muñoz

Sewage sludge can be used as fertilizer in agriculture, representing an environmentally and economically advantageous alternative to disposal in landfills and incinerators, however helminth eggs compromises its destination. In this study, we evaluated helminth eggs in raw and treated sewage sludge after thermal drying in an agricultural greenhouse, from two wastewater treatment plants (namely WWTP-A and WWTP-B), in intention of verifying a low-cost treatment technology to obtain treated sewage sludge for agricultural purposes. Helminths eggs of Hymenolepis diminuta and Ascaris sp were the most frequent. In the sludge from WWTP-A the mean concentration of helminth eggs, respectively, was 3.49 ± 1.45 and 1.01 ± 1.13 eggs/g TS in the raw and treated sludge (p = 0.0382). In WWTP-B, the mean concentration of helminth eggs was 8.14 ± 1.28 and 2.33 ± 3.81 eggs/g TS, respectively, in the raw and treated sludge (p = 0.0495). The maximum percentages of egg removal were 93.81 % in WWTP-A and 98.80 % in WWTP-B. No viable eggs were detected in treated sewage sludge, indicating that the biosolid could be classified as Class A under legal parasitological parameters, allowing for extensive use in agricultural crops, which represents a sustainable alternative for the disposal of sewage sludge.

污水污泥可以用作农业肥料，在环境和经济上都比垃圾填埋场和焚化炉处理更有利，但蠕虫卵会损害其目的地。在本研究中，我们评估了两个污水处理厂（即WWTP-A和WWTP-B）在农业温室中热干燥后的未经处理和处理的污水污泥中的蠕虫卵，旨在验证一种低成本处理技术，以获得用于农业目的的处理过的污水污泥。以小膜绦虫卵和蛔虫卵居多。在污水处理厂a污泥中，生污泥和处理污泥的平均虫卵浓度分别为3.49±1.45和1.01±1.13个虫卵/g TS （p = 0.0382）。在WWTP-B中，生污泥和处理污泥中蠕虫卵的平均浓度分别为8.14±1.28个和2.33±3.81个/g TS （p = 0.0495）。WWTP-A和WWTP-B的最大除卵率分别为93.81%和98.80%。处理后的污泥中未检测到活虫卵，表明该生物固体在法定寄生虫学参数下可被分类为A类，允许在农作物中广泛使用，这代表了污水污泥处理的可持续替代方案。

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引用次数: 0

Plastics and polymers today, some questions, a particular viewpoint 今天的塑料和聚合物，一些问题，一个特定的观点

Waste Management Bulletin

Pub Date : 2025-09-01 Epub Date: 2025-07-22 DOI: 10.1016/j.wmb.2025.100226

Michel Dumon

The number of plastic and polymer types are tremendously numerous. At the present time, they fulfill a lot of daily citizen’s needs and economical interests. They appear to be irreplaceable, but they raise questions. The paper is not a case study nor an experimental study but a viewpoint on the fate of plastics. Their situation and evolution are presented in the form of questions where actors and ‘spheres’ correspond to different visions. ‘Spheres’ are industry, ecosystems, waste management, innovation, technologies and citizens. Statistics predict a growing production and consumption of plastics. Thus a dilemma arises between environment and health protection, the well being of citizens, the will of authorities, the will and ability of manufacturers/producers to supply better ‘products’, and the willingness of citizens to change their habits and behaviors towards less plastics.

Against overuse and pollution, plastic recycling is stopgap, a subterfuge. Recycling of all fossile-based plastics is an illusion. Bioplastics are very partial substitutes for fossil-based plastics. The future of plastics deals as much as with behaviors, habits and wills rather than materials themselves. A true decrease in the plastics consumption, firstly those used in packaging, is a long-term solution. But, according to most data and figures, fossile synthetic plastics will be produced and used for decades.

塑料和聚合物的种类非常多。目前，它们满足了许多市民的日常需求和经济利益。他们似乎是不可替代的，但他们提出了问题。这篇论文不是一个案例研究，也不是一个实验研究，而是一个关于塑料命运的观点。他们的处境和演变以问题的形式呈现，行动者和“领域”对应于不同的愿景。“领域”是指工业、生态系统、废物管理、创新、技术和公民。统计数据预测塑料的生产和消费将不断增长。因此，在环境与健康保护、公民的福祉、当局的意愿、制造商/生产商提供更好“产品”的意愿和能力以及公民改变习惯和行为以减少塑料的意愿之间，出现了一个两难局面。为了防止过度使用和污染，塑料回收是一种权宜之计，一种诡计。所有化石塑料的回收都是一种幻想。生物塑料是化石基塑料的部分替代品。塑料的未来更多地涉及行为、习惯和意志，而不是材料本身。真正减少塑料消耗，首先是那些用于包装的塑料，是一个长期的解决方案。但是，根据大多数数据和数字，化石合成塑料将被生产和使用几十年。

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引用次数: 0

A green process for lignin extraction and lignocellulose degrading enzyme production from rice straw by solid state fermentation with Streptomyces thermoviolaceous strains 用热膜链霉菌固态发酵从水稻秸秆中提取木质素和生产木质纤维素降解酶的绿色工艺

Waste Management Bulletin

Pub Date : 2025-09-01 Epub Date: 2025-04-12 DOI: 10.1016/j.wmb.2025.100207

Sonam Priyadarshani , Preeti Nandal , Anju Arora , Gautam Chawla , Rajesh kumar , Debarup Das , Archna Suman

Actinobacteria belonging to genus Streptomyces are a versatile group actively involved in global C cycle with abilities to degrade several recalcitrant substrates. Inhabiting diverse ecological niches, they are active in different pH and temperature regimes thus a source of robust enzymes for exploitation in bioprocessing. Compost is one such habitat supporting huge microbial diversity, lignocellulolytic actinobacteria being predominant in community. In this study, two actinobacterial strains isolated from compost through enrichment culture, identified as Streptomyces thermoviolaceous S1 and S2, showed lignocellulolose degrading enzyme production. When grown on rice straw under solid state fermentation they disrupted lignocellulose matrix. Structural changes in solid substrate were observed by non-invasive techniques SEM, XRD and FTIR. Alkali extraction of fermented solids removed about ∼ 33 % lignin from rice straw while buffer extracts showed high specific activities of all three components of cellulases, xylanase (84 IU/ mL), laccase (59 IU/ mL) and lignin peroxidase (26 IU/ mL).

S. thermoviolaceous S2 showed better enzyme activities, lignin removal and cellulose enrichment than S1 (53.03 % and 49.01 % by S. thermoviolaceous S2 and S1 respectively). Alkali extraction led to efficient lignin removal than buffer extraction as evident from higher absorbance of alkali extracts (@205 nm) which was corroborated by higher recovery of acid precipitable lignin. Better cellulose enrichment enabled higher glucan loading and higher sugar yields upon enzymatic saccharification than uninoculated substrate. This study outlined a green like process involving biological treatment of rice straw with S. thermoviolaceous strains for delignification, lignin recovery and simultaneous lignocellulose degrading enzyme production for biomass processing.

放线菌属链霉菌是一个多用途的群体，积极参与全球碳循环，具有降解多种难降解底物的能力。它们栖息于不同的生态位，在不同的pH值和温度下都很活跃，因此是生物加工中开发的强大酶的来源。堆肥就是这样一个支持大量微生物多样性的栖息地，其中木质纤维素分解放线菌在群落中占主导地位。在本研究中，通过富集培养从堆肥中分离出两株放线菌，鉴定为Streptomyces thermoviolaceous S1和S2，它们具有产木质纤维素降解酶的能力。当它们在秸秆上生长时，在固态发酵下破坏木质纤维素基质。采用扫描电镜（SEM）、x射线衍射（XRD）和红外光谱（FTIR）等非侵入性技术观察了固体衬底的结构变化。碱提法对秸秆中木质素的去除率约为33%，而缓冲液对三种纤维素酶（木聚糖酶（84 IU/ mL）、漆酶（59 IU/ mL）和木质素过氧化物酶（26 IU/ mL））均具有较高的比活性。S2的酶活、木质素去除和纤维素富集能力均优于S1（分别为53.03%和49.01%）。碱萃取比缓冲萃取更有效地去除木质素，碱萃取物（@205 nm）的吸光度更高，酸沉淀木质素的回收率也更高。与未接种的底物相比，更好的纤维素富集使酶糖化过程中葡聚糖负载和糖产量更高。本研究概述了一种类似绿色的稻秆生物处理工艺，包括利用热紫葡萄球菌进行脱木质素、回收木质素和同时生产木质纤维素降解酶进行生物质加工。

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引用次数: 0

Exploring the potential of garbage enzyme as an eco-friendly option for leachate treatment collected from Pirana dumping site, Ahmedabad, Gujarat, India 探索垃圾酶作为处理印度古吉拉特邦艾哈迈达巴德皮拉纳垃圾场收集的渗滤液的环保选择的潜力

Waste Management Bulletin

Pub Date : 2025-09-01 Epub Date: 2025-04-21 DOI: 10.1016/j.wmb.2025.100210

Dharni Parekh , Sachin Vaidh , Dhara Patel , Shuvomoy Banerjee , Gajendra Singh Vishwakarma

Garbage enzyme (GE), a bio-catalytic solution produced through the fermentation of organic waste, has gained popularity as an alternate way to wastewater and leachate treatment. This study examines the ability of GE to degrade organic pollutants, and hazardous chemicals usually present in leachate. In this regard, the leachate samples were collected from the Pirana solid waste dumping site in Ahmedabad, India. The samples were having average values of different parameters like pH: 8.8 ± 0.12 mg/L, Total dissolve solids (TDS mg/L) 19000 ± 199.9 mg/L, and Electric conductivity (EC mg/L) 21800 ± 110.12, Chemical Oxygen Demand (COD mg/L) 13500 ± 2411 mg/L, and Ammoniacal nitrogen (NH₃-N mg/L): 1750 ± 15.01 mg/L. Furthermore, one of the representative samples was utilized for the exploration of the biodegradation capacity of GE of the organic pollutants present in the leachate. Before the utilization of the GE in the treatment, the GE is characterized via biochemical profiling, enzymatic activity analysis, and metagenomic profiling of microbial populations. The findings show the presence of metabolites like flavonoids, alkaloids, quinones, saponins, and cardenolides in the GE; the bacterial group Acetobacter senegalensis was generally considered higher in the population, and the Komagataeibacter swingsii was in low abundance. In addition to that, the presence of enzymes like lipase and amylase was also confirmed with the further biochemical analysis. The treatment efficiency showed the significant reduction in the COD (47 % for citrus fruit GE and 60 % for the non-citrus fruit GE) and NH₃-N 40 % for citrus fruit GE and 45 % for the non-citrus fruit) GE as compared to the control.

垃圾酶（GE）是一种通过有机废物发酵产生的生物催化溶液，已成为污水和渗滤液处理的替代方法。本研究考察了通用电气降解有机污染物和通常存在于渗滤液中的有害化学物质的能力。在这方面，渗滤液样本是从印度艾哈迈达巴德的皮拉纳固体废物倾倒场收集的。样品的pH值为8.8±0.12 mg/L，总溶解固形物（TDS）为19000±199.9 mg/L，电导率（EC）为21800±110.12 mg/L，化学需氧量（COD）为13500±2411 mg/L，氨态氮（NH3-N）为1750±15.01 mg/L。此外，利用其中一个代表性样品探索了GE对渗滤液中有机污染物的生物降解能力。在将GE用于处理之前，GE通过生化分析、酶活性分析和微生物种群宏基因组分析进行表征。研究结果表明，GE中存在黄酮类、生物碱、醌类、皂苷和桉皮内酯等代谢物；一般认为塞内加尔醋酸杆菌（Acetobacter senegalensis）在种群中丰度较高，而komagataebacter swingsii丰度较低。除此之外，进一步的生化分析也证实了脂肪酶和淀粉酶等酶的存在。与对照相比，处理效率显著降低了COD（柑桔GE为47%，非柑桔GE为60%）和NH3-N（柑桔GE为40%，非柑桔GE为45%）。

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引用次数: 0

Alternative food networks in supply Chains: A Biblio-metric analysis using RStudio and VOSViewer (1989–2024) 供应链中的替代食品网络：使用RStudio和VOSViewer的文献计量分析（1989-2024）

Waste Management Bulletin

Pub Date : 2025-09-01 Epub Date: 2025-05-17 DOI: 10.1016/j.wmb.2025.100215

Wang Xi , Zailani Suhaiza

Alternative Food Networks (AFNs) have gained growing attention for promoting sustainable food systems by addressing upstream food production, distribution, and waste reduction challenges. This study conducts a comprehensive bibliometric analysis of 830 peer-reviewed articles published between 1989 and 2024, retrieved from the Web of Science Core Collection. Utilizing VOSviewer and RStudio, the analysis maps the intellectual structure, thematic evolution, and global research dynamics of AFNs over the past three decades. The results reveal an average annual growth rate of 11.19%, with a sharp increase in publications after 2020, driven by heightened interest in resilient, local, and circular food systems. Co-word and cluster network analyses identify four major thematic domains: (1) local food and consumption patterns, (2) sustainability and environmental impacts, (3) governance, policy, and social justice, and (4) community participation and social innovation. Key theoretical frameworks underpinning the field include Actor-Network Theory, Convention Theory, and the Theory of Planned Behavior. This study distinguishes itself by framing AFNs as upstream system-level interventions with the potential to complement or substitute downstream technological approaches to waste management. It highlights AFNs’ unique contributions to reducing food loss and waste, strengthening local economies, and fostering inclusive development. The findings also reveal a research gap in the Global South, where AFNs could address food safety and local poverty. This review offers practical guidance for researchers and policymakers to advance AFNs’ research and design place-based, sustainable food governance strategies.

替代粮食网络（afn）通过解决上游粮食生产、分配和减少废物的挑战，促进可持续粮食系统，已获得越来越多的关注。本研究对1989年至2024年间发表的830篇同行评议文章进行了全面的文献计量分析，这些文章检索自Web of Science Core Collection。利用VOSviewer和RStudio，分析了过去三十年来afn的知识结构、主题演变和全球研究动态。结果显示，平均年增长率为11.19%，在2020年之后，由于对弹性、本地和循环粮食系统的兴趣增加，出版物急剧增加。共词和聚类网络分析确定了四个主要主题领域：(1)当地食物和消费模式；(2)可持续性和环境影响；(3)治理、政策和社会正义；(4)社区参与和社会创新。支撑该领域的主要理论框架包括行动者网络理论、约定理论和计划行为理论。本研究的特点是将afn作为上游系统级干预措施，具有补充或替代下游废物管理技术方法的潜力。它强调了afn在减少粮食损失和浪费、加强地方经济和促进包容性发展方面的独特贡献。研究结果还揭示了全球南方的一个研究缺口，在那里，AFNs可以解决食品安全和当地贫困问题。这一综述为研究人员和政策制定者推进afn的研究和设计基于地方的可持续食品治理战略提供了实用指导。

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引用次数: 0

Synthesis of activated carbon using pyrolytic degradation of multi plastic waste and its removal efficiency of dye 热解降解多种塑料垃圾合成活性炭及其对染料的去除率

Waste Management Bulletin

Pub Date : 2025-09-01 Epub Date: 2025-05-12 DOI: 10.1016/j.wmb.2025.100214

Sayan Mukherjee , Shashank Pal , Subhasis Ghosh , Sandipan Bhattacharya , Surajit Mondal , Papita Das

Malachite Green is a persistent pollutant, and it has been reported to cause many harmful health hazards for both humans and aquatic organisms. Growing use of plastic is posing a lot of problems and the most pertinent of which is perhaps the treatment of plastic waste. In the present work, plastic waste has been pyrolyzed, annealed and treated with sodium hydroxide to synthesize a char. Then this char has been used to remove the cationic dye Malachite Green from water and was observed highest removal of Malachite Green by the char was 99.3 %. From the thermodynamic study, it was observed that the value of Gibbs free energy was negative across all the temperature thereby denoting that the process was spontaneous. The process was optimized with an Artificial Neural Network system and from there it was observed that the Levenberg-Marquardt backpropagation model best optimized the experimental data. The char also exhibited high efficiency for the purpose of removing other cationic dyes and polyaromatic hydrocarbons, whereas showing a lower affinity for anionic dyes and pharmaceutical compounds.

孔雀石绿是一种持久性污染物，据报道对人类和水生生物造成许多有害的健康危害。塑料的日益使用带来了许多问题，其中最相关的问题可能是塑料废物的处理。在本工作中，对塑料垃圾进行了热解、退火和氢氧化钠处理，合成了一种炭。然后用该焦炭对水中阳离子染料孔雀石绿进行脱除，观察到该焦炭对孔雀石绿的去除率最高达99.3%。热力学研究发现，在整个温度范围内，吉布斯自由能均为负，表明反应是自发的。利用人工神经网络系统对该过程进行优化，并观察到Levenberg-Marquardt反向传播模型对实验数据的优化效果最好。该炭对其他阳离子染料和多芳烃的去除率较高，而对阴离子染料和药物化合物的去除率较低。

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引用次数: 0

Assessing waste management practices and sustainable recycling opportunities in Nepal 评估尼泊尔的废物管理做法和可持续回收机会

Waste Management Bulletin

Pub Date : 2025-09-01 Epub Date: 2025-07-12 DOI: 10.1016/j.wmb.2025.100228

Mohan Bhandari , Ghanashyam Tiwari , Maheshwor Dhakal

Nepal’s growing urbanization has intensified the challenges of waste management, yet it also opens opportunities to transform waste into valuable resources. This study explores the “Waste to Wealth” paradigm, focusing on recycling and resource management for sustainable development in Nepal. The study aims to understand waste management practices, identify key challenges, and uncover opportunities for sustainable recycling and resource valorization across diverse urban contexts. Adopting an interpretivist philosophy and a qualitative approach, the research engages with stakeholders in Kathmandu, Pokhara, Butwal, and Dhangadi. Purposive sampling includes policymakers, municipal officers, community members, social entrepreneurs, and environmental activists. Semi-structured interviews conducted in Nepali yield rich insights, analyzed thematically using Braun & Clarke’s (Braun and Clarke, 2006) six-phase framework. Ethical standards, peer debriefing, and meticulous documentation ensure rigor and credibility. The findings are categorized into key themes as waste composition and current practices (organic waste dominates, with limited segregation at source), role of the informal sector in collection and recycling, resource valorization to create economic opportunities, socio economic impacts, innovative practices and challenges (weak municipal services, inadequate infrastructure, limited community awareness, and fragmented policy enforcement hinder progress). Turning waste into wealth in Nepal demands coordinated efforts among policymakers, communities, and entrepreneurs. With strategic support, localized innovations, and inclusive governance, waste can become a catalyst for sustainable development.

尼泊尔日益增长的城市化加剧了废物管理的挑战，但也为将废物转化为宝贵资源提供了机会。本研究探讨了“废物转化财富”模式，重点关注尼泊尔可持续发展的回收和资源管理。该研究旨在了解废物管理实践，确定主要挑战，并发现在不同城市环境中实现可持续回收和资源增值的机会。本研究采用解释主义哲学和定性方法，与加德满都、博卡拉、布瓦尔和丹加迪的利益相关者进行了合作。有目的的抽样包括政策制定者、市政官员、社区成员、社会企业家和环境活动家。在尼泊尔进行的半结构化访谈产生了丰富的见解，使用Braun &；克拉克（Braun and Clarke, 2006）的六阶段框架。道德标准、同行汇报和细致的文件确保了严谨性和可信度。调查结果分为以下几个关键主题：废物组成和当前做法（有机废物占主导地位，源头隔离有限）、非正规部门在收集和再循环中的作用、资源增值以创造经济机会、社会经济影响、创新做法和挑战（市政服务薄弱、基础设施不足、社区意识有限、政策执行分散阻碍了进展）。在尼泊尔，将废物转化为财富需要决策者、社区和企业家之间的协调努力。通过战略支持、本地化创新和包容性治理，废物可以成为可持续发展的催化剂。

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引用次数: 0

Assessment of the challenges to implementing green manufacturing in the food and beverage industry: an emerging economy perspective 评估在食品和饮料行业实施绿色制造的挑战：一个新兴经济体的视角

Waste Management Bulletin

Pub Date : 2025-09-01 Epub Date: 2025-07-01 DOI: 10.1016/j.wmb.2025.100225

Maishat Lubaba , Sanjida Hassan , Munera Sultana , Shah Murtoza Morshed , A.B.M. Mainul Bari

Green Manufacturing (GM) is a pivotal strategy for fostering sustainability in the food and beverage industry, particularly in emerging economies. It addresses critical environmental issues, including high carbon emissions, excessive waste, and water pollution, while improving resource efficiency and aligning industrial practices with global environmental standards. Despite its potential benefits, the implementation of GM in the food and beverage sector faces significant, often underexplored, challenges, particularly in resource-constrained emerging economies. These obstacles hinder effective decision-making and the adoption of sustainable practices. This study aims to explore the challenges associated with GM implementation in the food and beverage industry within the context of an emerging economy like Bangladesh. Through a comprehensive literature review and expert consultations, seventeen key challenges were identified. These challenges were evaluated using the Bayesian Best-Worst Method (BWM), which is a probabilistic group decision-making approach. The findings reveal that the top three challenges are: “Difficulty to incorporate eco-friendly design concepts” (weight: 0.0740), “Absence of efficient recycling facilities” (weight: 0.0658), and “High initial investment cost and lack of financial support” (weight: 0.0657). The study provides a strategic framework for policymakers and industry leaders to address these barriers effectively. It also outlines actionable guidelines and strategies to facilitate the transition toward sustainable practices, ensuring environmental, economic, and social sustainability while enhancing industrial competitiveness and performance.

绿色制造（GM）是促进食品和饮料行业可持续发展的关键战略，特别是在新兴经济体。它解决关键的环境问题，包括高碳排放、过度浪费和水污染，同时提高资源效率，使工业实践与全球环境标准保持一致。尽管有潜在的好处，但在食品和饮料行业实施转基因面临着重大的、往往未被充分探索的挑战，特别是在资源有限的新兴经济体。这些障碍妨碍有效决策和采用可持续做法。本研究旨在探讨在孟加拉国这样的新兴经济体背景下，与食品和饮料行业实施转基因相关的挑战。通过全面的文献回顾和专家咨询，确定了17个主要挑战。这些挑战使用贝叶斯最佳-最差方法（BWM）进行评估，这是一种概率群体决策方法。调查结果显示，前三大挑战是：“难以融入环保设计理念”（权重：0.0740），“缺乏有效的回收设施”（权重：0.0658），以及“初始投资成本高且缺乏资金支持”（权重：0.0657）。该研究为政策制定者和行业领导者有效解决这些障碍提供了一个战略框架。它还概述了可操作的指导方针和战略，以促进向可持续实践的过渡，确保环境、经济和社会的可持续性，同时提高工业竞争力和绩效。

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引用次数: 0

Pilot-scale anaerobic digestion of on-farm agro-residues: Boosting biogas production and digestate quality with thermophilic post-digestion 农场农业残留物的中试厌氧消化：通过嗜热后消化提高沼气产量和消化质量

Waste Management Bulletin

Pub Date : 2025-09-01 Epub Date: 2025-04-06 DOI: 10.1016/j.wmb.2025.100201

Shruti Katti , Bernard Willems , Erik Meers , Çağrı Akyol

Environmental challenges associated with the disposal of organic farm waste and the growing demand for renewable energy underscore the importance of anaerobic digestion (AD), a process that converts organic matter into biogas and nutrient-rich digestate, offering a sustainable solution for waste management and energy production. This study evaluated a two-step AD process using cow manure and yeast extract through mono- and co-digestion trials at pilot-scale, serving as a preliminary step to assess feasibility and performance prior to scaling up for full-scale implementation on a dairy farm. Two 72 L continuously stirred tank reactors were operated, with the primary reactor maintained at mesophilic conditions and the secondary reactor acting as a thermophilic post-digester. This configuration was used to assess the influence of thermophilic post-digestion on biogas yield and digestate quality. During the mono-digestion of manure, mesophilic digestion yielded 138 L CH₄/kg VS, while thermophilic post-digestion provided an additional methane recovery of 100 L CH₄/kg VS. Co-digestion with yeast extract significantly enhanced methane yield, increasing it 1.77-fold to 421 L CH₄/kg VS in the two-stage AD system. However, co-digestion resulted in elevated hydrogen sulphide (H₂S) levels, posing potential challenges for biogas purification. Additionally, higher and more fluctuating volatile fatty acid concentrations were observed compared to manure mono-digestion. The quality and safety of the digestates remained comparable between mono- and co-digestion treatments, suggesting that co-digestion with yeast extract can offer advantages for manure-based AD systems, although an effective H₂S mitigation strategy is recommended to optimise process sustainability.

与有机农业废弃物处理相关的环境挑战以及对可再生能源日益增长的需求凸显了厌氧消化（AD）的重要性。厌氧消化是一种将有机物转化为沼气和营养丰富的消化物的过程，为废弃物管理和能源生产提供了可持续的解决方案。本研究通过中试规模的单消化和共消化试验，评估了使用牛粪和酵母提取物的两步AD工艺，作为在奶牛场全面推广之前评估可行性和性能的初步步骤。2个72 L连续搅拌槽式反应器运行，其中主反应器维持在中温条件下，次反应器作为嗜热后消化池。该配置用于评估嗜热后消化对沼气产量和消化品质的影响。在单消化过程中，中温消化的甲烷产率为138 L CH4/kg VS，而热消化后的甲烷产率为100 L CH4/kg VS，与酵母浸出物共消化显著提高了甲烷产率，达到421 L CH4/kg VS，两级AD系统中甲烷产率提高了1.77倍。然而，共消化导致硫化氢（H2S）水平升高，给沼气净化带来了潜在的挑战。此外，与粪便单消化相比，观察到更高和更波动的挥发性脂肪酸浓度。在单独消化和共消化处理之间，消化液的质量和安全性仍然相当，这表明与酵母提取物共消化可以为基于粪便的AD系统提供优势，尽管建议采用有效的H2S缓解策略来优化过程的可持续性。

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引用次数: 0

Comprehensive study of pollution removal from landfill leachate with emphasis on phenolic compounds and heavy metals using non-thermal plasma technology 以非热等离子体技术去除垃圾渗滤液中酚类化合物和重金属为重点的综合研究

Waste Management Bulletin

Pub Date : 2025-09-01 Epub Date: 2025-07-27 DOI: 10.1016/j.wmb.2025.100233

Mahdiyeh Bakhtiyari-Ramezani , Fatemeh Mohammadi , Maryam Azizi , Narges Ziveh , Fatemeh Amani

Landfill leachate poses a significant environmental threat. This study examined Non-thermal plasma (NTP) technology for treating landfill leachate after pretreatments to tackle this issue. EC and TDS decreased by over 96 %, COD by 98 %, turbidity by 97 %, color by 93 %, TSS by 98 %, and BOD₅ by 97 %. Phenol levels dropped by more than 98 %, and significant heavy metal removal was achieved: Cd, Hg, Pb, Cu, Ni, Al, Fe, and Zn concentrations were reduced by 90 %, 95 %, 97 %, 92 %, 94 %, 72 %, 65 %, and 77 %, respectively. These findings underscore the potential of NTP technology as a valuable tool for wastewater treatment.

堆填区渗滤液对环境构成严重威胁。为了解决这一问题，本研究采用非热等离子体（NTP）技术对垃圾渗滤液进行预处理处理。EC和TDS降低96%以上，COD降低98%，浊度降低97%，色度降低93%，TSS降低98%，BOD5降低97%。苯酚水平下降了98%以上，并且实现了显著的重金属去除：Cd、Hg、Pb、Cu、Ni、Al、Fe和Zn浓度分别降低了90%、95%、97%、92%、94%、72%、65%和77%。这些发现强调了NTP技术作为废水处理的宝贵工具的潜力。

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