Boosting the circularity of waste management: pretreated mature landfill leachate enhances the anaerobic digestion of market waste

IF 14.4 Q1 ENERGY & FUELS
F. Fazzino, Altea Pedullà, P. Calabrò
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引用次数: 14

Abstract

Adequate waste management is essential not only to ensure healthy living conditions but also to mitigate climate change. Accordingly, the research on developing strategies to boost the circularity of waste management systems is ongoing. In this context, two waste streams are concurrently managed to recover energy and materials in the present study. Specifically, real leachate collected from a full-scale mature landfill site was preliminarily treated through active filtration to remove inhibitory substances partially and then tested, at the laboratory scale, as a nutrient solution for semi-continuous anaerobic digestion of a carbonaceous substrate represented by market waste. The results demonstrate that, at an organic loading rate of 1.0 gVS∙L-1∙d-1, the process was impossible without using the nutrient solution, while the nitrogen present in the pretreated leachate could balance the carbon content of the market waste and provide the system with the necessary buffering capacity, ensuring process stability. The average methane yield (approximately 0.29 NL∙gVS-1) was satisfactory and consistent with the literature. Despite the increases in both the organic loading rate (up to 1.5 gVS∙L-1∙d-1) and volume of added pretreated leachate (up to 100% of the dilution medium), the process remained stable with a slightly lower methane yield of 0.21 NL∙gVS-1, thanks to nitrogen supplementation. The potential use of produced methane as a renewable energy source and residual digestate as fertilizer would close the loop of managing these waste streams.
促进废物管理循环:经预处理的成熟堆填渗滤液可促进市场废物的厌氧消化
充分的废物管理不仅对确保健康的生活条件至关重要,而且对缓解气候变化也至关重要。因此,关于制定战略以提高废物管理系统的循环性的研究正在进行中。在这种情况下,在本研究中,同时管理两条废物流以回收能量和材料。具体而言,通过活性过滤对从全尺寸成熟垃圾填埋场收集的真实渗滤液进行初步处理,以部分去除抑制性物质,然后在实验室规模上测试,作为以市场废物为代表的碳质基质的半连续厌氧消化的营养液。结果表明,在1.0 gVS∙L-1∙d-1的有机负荷率下,如果不使用营养液,该过程是不可能的,而预处理渗滤液中的氮可以平衡市场废物的碳含量,并为系统提供必要的缓冲能力,确保过程的稳定性。平均甲烷产量(约0.29NL∙gVS-1)令人满意,与文献一致。尽管有机负荷率(高达1.5 gVS∙L-1∙d-1)和添加的预处理渗滤液体积(高达稀释介质的100%)都有所增加,但由于补充了氮,该过程保持稳定,甲烷产量略低,为0.21 NL∙gVS-1。生产的甲烷可能被用作可再生能源,剩余的消化物可能被用作肥料,这将关闭管理这些废物流的循环。
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来源期刊
CiteScore
22.10
自引率
1.50%
发文量
15
审稿时长
8 weeks
期刊介绍: Biofuel Research Journal (BRJ) is a leading, peer-reviewed academic journal that focuses on high-quality research in the field of biofuels, bioproducts, and biomass-derived materials and technologies. The journal's primary goal is to contribute to the advancement of knowledge and understanding in the areas of sustainable energy solutions, environmental protection, and the circular economy. BRJ accepts various types of articles, including original research papers, review papers, case studies, short communications, and hypotheses. The specific areas covered by the journal include Biofuels and Bioproducts, Biomass Valorization, Biomass-Derived Materials for Energy and Storage Systems, Techno-Economic and Environmental Assessments, Climate Change and Sustainability, and Biofuels and Bioproducts in Circular Economy, among others. BRJ actively encourages interdisciplinary collaborations among researchers, engineers, scientists, policymakers, and industry experts to facilitate the adoption of sustainable energy solutions and promote a greener future. The journal maintains rigorous standards of peer review and editorial integrity to ensure that only impactful and high-quality research is published. Currently, BRJ is indexed by several prominent databases such as Web of Science, CAS Databases, Directory of Open Access Journals, Scimago Journal Rank, Scopus, Google Scholar, Elektronische Zeitschriftenbibliothek EZB, et al.
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