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Applied Sciences
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Advanced Methods and Practices for the Management of Biogas, Leachate,...
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Advanced Methods and Practices for the Management of Biogas, Leachate, and Post-closure of Landfills

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Environmental Sciences".

Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 6447

Special Issue Editors

Prof. Fulvia Chiampo

E-Mail Website
Guest Editor
Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
Interests: solid wastes; soil remediation; landfill gas; environmental impacts of industry
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Micaela Demichela

E-Mail Website
Guest Editor
Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
Interests: risk assessment; risk management; territory resilience against natural and anthropic risks; emergency management and planning

Special Issue Information

Dear Colleagues,

The huge amounts of solid wastes disposed in landfills, closed or still operative, pose serious environmental problems. Notwithstanding the legislative documents in force in all the industrialized countries, the environmental impacts during the landfill life and after its closure are numerous. Moreover, these impacts act on different sectors. Landfill is always linked to biogas and leachate, gas emissions, and risk of pollution to groundwater. However, other features must be considered: noises, odor, and dust diffusion during waste disposal, risks for workers, settlement of land and return to the population over time, health impacts on the population living close to the site, and loss of economic value for the land surrounding the landfill itself.

This Special Issue aims to gather contributions dealing with methods, systems, and techniques able to reduce and limit the impacts deriving from all the operations carried out during the landfill life and after its closure.

Both experimental studies at a small scale and results deriving from on-site experience are welcome.

Prof. Fulvia Chiampo
Prof. Dr. Micaela Demichela
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • landfill environmental impacts
  • biogas
  • leachate
  • risk analysis
  • waste properties
  • post-closure
  • groundwater
  • landfill mining
  • landfill remediation

Published Papers (3 papers)

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Research

14 pages, 3356 KiB  
Article
Geophysical Monitoring of Leachate Injection in Pretreated Waste Landfill
by Alberto Godio and Fulvia Chiampo
Appl. Sci. 2023, 13(9), 5661; https://0-doi-org.brum.beds.ac.uk/10.3390/app13095661 - 04 May 2023
Cited by 5 | Viewed by 2481
Abstract
Landfill leachate recirculation is applied to manage the landfill as a bioreactor to enhance biogas production, limiting the impact due to greenhouse gas emissions and optimizing the energy recovery from biogas. This study deals with the geophysical monitoring of the leachate recirculation within [...] Read more.
Landfill leachate recirculation is applied to manage the landfill as a bioreactor to enhance biogas production, limiting the impact due to greenhouse gas emissions and optimizing the energy recovery from biogas. This study deals with the geophysical monitoring of the leachate recirculation within the waste of a pretreated waste landfill. For this aim, electrical resistivity tomography (ERT) was adopted, detecting the main distribution of moisture within the waste both through the surface and through several boreholes. The electrical resistivity of waste mainly depends on water content, leachate salinity and temperature. The method is sensitive to the transient phenomena associated with leachate flow within the waste; moreover, the ERT long-term monitoring data suffer from anomalous and unexpected polarization phenomena induced by the measurements themselves. Results demonstrated the reliability of this approach to qualitatively detect the landfill volume affected by the leachate circulation. The effects of moisture changes by leachate infiltration on biogas production are still challenging, notwithstanding a positive effect on methane concentration in biogas itself is evident. Full article
(This article belongs to the Special Issue Advanced Methods and Practices for the Management of Biogas, Leachate, and Post-closure of Landfills)
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25 pages, 5460 KiB  
Article
Evaluation of the Different Fractions of Organic Matter in an Electrochemical Treatment System Applied to Stabilized Leachates from the Bordo Poniente Landfill in Mexico City
by Alfredo Martínez-Cruz and María Neftalí Rojas-Valencia
Appl. Sci. 2023, 13(9), 5605; https://0-doi-org.brum.beds.ac.uk/10.3390/app13095605 - 01 May 2023
Cited by 3 | Viewed by 1558
Abstract
The presence of refractory compounds in stabilized leachates makes treatment complex. In leachate treatment systems, the lack of data on the characterization of leachates and effluents makes it difficult to track and explain the evolution of organic matter. In this study, the fractionation [...] Read more.
The presence of refractory compounds in stabilized leachates makes treatment complex. In leachate treatment systems, the lack of data on the characterization of leachates and effluents makes it difficult to track and explain the evolution of organic matter. In this study, the fractionation of chemical oxygen demand (COD) and humic substances, including humic acids (HA) and fulvic acids (FA), in addition to the application of spectroscopic techniques (Fourier transform infrared and ultraviolet–visible spectroscopy), were used to solve this data gap. A treatment system was proposed: electro-coagulation (EC) and electro-oxidation (EO). Optimal conditions (maximum COD removal) were EC, I: 4.3 A, stirring: 120 revolutions per minute, and pH: 7; EO, added NaCl: 1.0 g L−1, distance between electrodes: 0.75 cm, I: 2 A, and pH: 7. Under optimal conditions COD, HA, and FA % removals were achieved: EC: 64, 69, and 63; EO: 83, 40, and 55; respectively. In EC, the % of biodegradable COD increased from 26 to 39 and in EO it increased from 39 to 58. The biodegradability index increased from 0.094 to 0.26 with EC and reached 0.46 with EO. The generated data allowed us to establish the transformations of organic matter in the process, which was useful for understanding the processes and functioning as a tool for improving treatment systems. Full article
(This article belongs to the Special Issue Advanced Methods and Practices for the Management of Biogas, Leachate, and Post-closure of Landfills)
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12 pages, 818 KiB  
Article
Exploring Effective Bio-Cover Materials for Mitigating Methane Emission at a Tropical Landfill
by Rathborey Chan, Wilai Chiemchaisri and Chart Chiemchaisri
Appl. Sci. 2023, 13(3), 1990; https://0-doi-org.brum.beds.ac.uk/10.3390/app13031990 - 03 Feb 2023
Cited by 1 | Viewed by 1608
Abstract
Methane emission and oxidation in different bio-cover materials, i.e., sandy loam, compost, and stabilized wastes, were investigated at a municipal solid waste landfill in Thailand. The bio-cover was purged with extracted landfill gas while methane reduction through biological oxidation was studied. The moisture [...] Read more.
Methane emission and oxidation in different bio-cover materials, i.e., sandy loam, compost, and stabilized wastes, were investigated at a municipal solid waste landfill in Thailand. The bio-cover was purged with extracted landfill gas while methane reduction through biological oxidation was studied. The moisture content in bio-cover materials was maintained with natural rainwater during the wet period and leachate irrigation during the dry period. Methane emissions were found to vary between media and were influenced by rainfall. The methane loading rates of the bio-cover varied from 8.2–20.3 mol/m3/d, being higher during the dry period. Methane removal rates at the bottom part of the biofilter (0.4–0.6 m depth), the most active zone, were found to be from 6.4–10.9 and 7.8–11.4 mol/m3/d during wet and dry periods. The highest methane removals were found in the lower part of sandy loam, followed sequentially by compost and stabilized wastes. Nevertheless, compost had the highest methane oxidation capacities and greater methanotroph population compared to sandy loam and stabilized wastes. Methanotroph type I was found to predominate during the dry period, whereas methanotroph type II was predominant during the wet period. Full article
(This article belongs to the Special Issue Advanced Methods and Practices for the Management of Biogas, Leachate, and Post-closure of Landfills)
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