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Applied Sciences
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Anaerobic Digestion for Waste/Wastewater Treatment
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Special Issue "Anaerobic Digestion for Waste/Wastewater Treatment"

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

Deadline for manuscript submissions: 20 July 2023 | Viewed by 1482

Special Issue Editors

Dr. Georgia Antonopoulou

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Guest Editor
Department of Environmental Engineering, University of Patras, 2 Georgiou Seferi St., Agrinio, Greece
Interests: microbial fuel cells (MFCs); microbial electrolysis cells (MECs); biofuel production via microbial processes (anaerobic digestion, fermentative hydrogen production and bioethanol production)
Special Issues, Collections and Topics in MDPI journals
Dr. Ioannis Vyrides

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Guest Editor
Department of Chemical Engineering, Cyprus University of Technology, Lemesos, Cyprus
Interests: anaerobic membrane reactor; organic saline wastewater treatment

Special Issue Information

Dear Colleagues,

Anaerobic digestion (AD) is a mature, environmental friendly technology that is widely used for waste/wastewater treatment. During AD the organic matter present in various types of wastes/wastewaters (sewage sludge, agro-industrial wastes, OFMSW, energy crops) is converted into biogas (mainly methane) and an effluent (digestate) with favourable fertiliser and soil amendment properties.

Recent improvements in various scientific fields (reactor engineering, modeling and optimization practices, molecular tools) gave a better insight of the process. In addition, research interest focused on the enhancement of the process efficiency through the development and study of new materials as additives in AD, biogas upgrading for maximizing methane production and exploitation of the digestate as a nutrient source.

Recently, co-digestion of feedstocks with different origin, and application of innovative pre-treatment technologies to enhance anaerobic biodegradability of the wastes/wastewaters used in AD, contributed in promoting the process in real scale applications.

This Special Issue, aims to present the wide range of implementation of AD used for waste/wastewater treatment. We welcome original research articles/reviews and also other types of paper with significant scientific meanings within related topic.

Dr. Georgia Antonopoulou
Dr. Ioannis Vyrides
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 2300 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.

Published Papers (2 papers)

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Article
Greenhouse Residues’ Potential for Biogas Production
by
Kleio Gioulounta
,
Maria Matska
,
Arsenios Piskilopoulos
and
Katerina Stamatelatou
Appl. Sci. 2023, 13(9), 5445; https://doi.org/10.3390/app13095445 - 27 Apr 2023
Viewed by 403
Abstract
Agricultural residues are intensively evaluated as potential feedstocks for biogas plants. Vegetable crops generate massive residues during and at the end of their growing seasons. A greenhouse facility in Greece, Thrace Greenhouses S.A., generates 7000–8000 t per year of residual green biomass, resulting [...] Read more.
Agricultural residues are intensively evaluated as potential feedstocks for biogas plants. Vegetable crops generate massive residues during and at the end of their growing seasons. A greenhouse facility in Greece, Thrace Greenhouses S.A., generates 7000–8000 t per year of residual green biomass, resulting from the hydroponic cultivation of tomatoes and cucumbers on 170,000 m2 of land from February to November. The crop residues included leaves, suckers, and stalks. The biochemical methane potential (BMP) estimation was realized on samples taken in March, May, and August, as well as at the end of cultivation (November). Suckers, leaves, and stalks of both plants yielded a range of 221–357, 210–296, and 225–250 NL kg−1 VS, respectively. t-test statistical analysis showed that the BMP of the leaves and suckers were statistically different for tomato and cucumber plants. The BMP of stalks was lower than the other residue types except for the tomato leaves. The diauxic behavior of the specifi‘1c methane production curves indicated that the two-phase Gompertz model (TGM) was the most suitable. The model fitting showed that leaves and suckers, in spite of having a higher BMP than the stalks, exhibited a lower maximum specific methane production rate constant than the stalks during the first phase, which may indicate the presence of inhibitory or slowly biodegradable compounds in leaves and suckers in comparison to the stalks. Full article
(This article belongs to the Special Issue Anaerobic Digestion for Waste/Wastewater Treatment)
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Article
Anaerobic Digestion of Synthetic Municipal Wastewater (MWW) in a Periodic Anaerobic Baffled Reactor (PABR): Assessment of COD Removal and Biogas Production
by
Achilleas Zarkaliou
,
Christos Kougias
,
Anna Mokou
,
Konstantina Papadopoulou
and
Gerasimos Lyberatos
Appl. Sci. 2022, 12(24), 13037; https://doi.org/10.3390/app122413037 - 19 Dec 2022
Viewed by 779
Abstract
The benchmark approach for municipal wastewater treatment is based on biological oxidation. Due to high energy consumption, alternative treatment schemes are proposed, among which anaerobic digestion is the most promising. In this work, the direct anaerobic digestion of municipal wastewater in a high-rate [...] Read more.
The benchmark approach for municipal wastewater treatment is based on biological oxidation. Due to high energy consumption, alternative treatment schemes are proposed, among which anaerobic digestion is the most promising. In this work, the direct anaerobic digestion of municipal wastewater in a high-rate system is examined. The reactor utilized for the study is the periodic anaerobic baffled reactor (PABR). Two distinct experimental cycles were conducted, during which the operational parameters of the PABR were consecutively modified: in the first cycle, six phases were conducted where the hydraulic retention time (HRT) varied from 10 to 1 days, the period T between 2.5 days and 0.25, while the OLR remained constant at values near 1.0 gsCOD/L/d. During the second cycle, four distinct phases were conducted with no switching imposed. The HRT varied from 4 to 1 d. The last experimental phase of both cycles was the most significant, due to feedstock resemblance to raw wastewater. The biogas and the biomethane production rates reached 66.8 L/d and 41.1 L/d, respectively, while the COD reduction rate reached 73.7%. Conclusively, the PABR is a high-rate AD system, capable of treating MWW under extreme operational conditions. Full article
(This article belongs to the Special Issue Anaerobic Digestion for Waste/Wastewater Treatment)
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