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Processes
Special Issues
Biomass and Waste Treatment Based on Anaerobic Digestion
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Biomass and Waste Treatment Based on Anaerobic Digestion

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Environmental and Green Processes".

Deadline for manuscript submissions: 30 November 2024 | Viewed by 3014

Special Issue Editors

Dr. Niloofar Abdehagh

E-Mail Website
Guest Editor
Department of Civil Engineering, University of Ottawa, Ottawa, ON, Canada
Interests: renewable energy; anaerobic digestion; waste to energy; GHG emission reduction; clean fuel
Prof. Dr. Majid Sartaj

E-Mail Website
Guest Editor
Department of Civil Engineering, University of Ottawa, Ottawa, ON K1N 6N5, Canada
Interests: sustainable solid waste management (SWM) technologies; bioreactor landfilling/biogas/renewable natural gas (NRG) production; bioremediation of contaminated soils; adsorption and ion-exchange processes; modelling fate and transport of contaminants in the environment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In this Special Issue, we gather valuable research and activities on biomass and waste treatment based on anaerobic digestion to produce renewable energy. This Special Issue will cover processes developed to reduce GHG emissions and to produce renewable energy by converting biomass and organic wastes to biogas. We think you could make an excellent contribution based on your expertise in this field. The topics of interest for this Special Issue include (but are not restricted to):

  • Anaerobic digestion feedstock pretreatment;
  • Advanced anaerobic digestion processes;
  • Developing high-efficiency biogas production and upgrading;
  • Biomethanation;
  • Digestate treatment processes;
  • Nutrient recovery from anaerobic digestate;
  • Anaerobic digestion process modeling.

We kindly invite you to contribute a paper to this Special Issue on “Biomass and Waste Treatment Based on Anaerobic Digestion” at Processes, an MDPI journal with an IF of 3.5.

Processes is fully open access. As indicated by several studies, open access (unlimited and free access by readers) increases publicity and promotes more frequent citations. Open access is supported by the authors and their institutes.

We hope you find this topic interesting and look forward to collaborating with you. Please feel free to contact me with any questions.

Dr. Niloofar Abdehagh
Prof. Dr. Majid Sartaj
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. Processes is an international peer-reviewed open access monthly 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

  • anaerobic digestion

  • GHG emission reduction
  • nutrient recovery
  • renewable natural gas (RNG)
  • biogas production and upgrading
  • biofertilizer
  • anaerobic digestion modeling
  • feedstock pretreatment
  • digestate treatment
  • advanced anaerobic digestion
  • waste to energy

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Published Papers (2 papers)

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Research

26 pages, 9518 KiB  
Article
Microbial Biomass in Mesophilic and Thermophilic High-Rate Biodigestion of Sugarcane Vinasse: Similar in Quantity, Different in Composition
by Lucas Tadeu Fuess, Matheus Neves de Araujo, Flávia Talarico Saia, Gustavo Bueno Gregoracci, Marcelo Zaiat and Piet N. L. Lens
Processes 2024, 12(7), 1356; https://doi.org/10.3390/pr12071356 - 29 Jun 2024
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Abstract
This study compared the behavior of the biomass in two fixed-film anaerobic reactors operated under equivalent organic loading rates but at different temperatures, i.e., 30 °C (RMM) and 55 °C (RMT). The reactors were fed with sugarcane vinasse and molasses (both fermented) in [...] Read more.
This study compared the behavior of the biomass in two fixed-film anaerobic reactors operated under equivalent organic loading rates but at different temperatures, i.e., 30 °C (RMM) and 55 °C (RMT). The reactors were fed with sugarcane vinasse and molasses (both fermented) in a simulation of sequential periods of season and off-season. The dynamics of biomass growth and retention, as well as the microbial composition, were assessed throughout 171 days of continuous operation, coupled with an additional 10-day test assessing the microbial activity in the bed region. Despite the different inoculum sources used (mesophilic granular vs. thermophilic flocculent sludge types), the biomass growth yield was identical (0.036–0.038 g VSS g−1COD) in both systems. The retention rates (higher in RMT) were regulated according to the initial amount of biomass provided in the inoculation, resulting in similar amounts of total retained biomass (46.8 vs. 43.3 g VSS in RMT and RMM) and biomass distribution patterns (30–35% in the feeding zone) at the end of the operation. Meanwhile, hydrogenotrophic methanogenesis mediated by Methanothermobacter coupled to syntrophic acetate oxidation prevailed in RMT, while the Methanosaeta-mediated acetoclastic pathway occurred in RMM. The results show that different anaerobic consortia can behave similarly in quantitative terms when subjected to equivalent organic loads, regardless of the prevailing methane-producing pathway. The community grows and reaches a balance (or a given cell activity level) defined by the amount of substrate available for conversion. In other words, while the metabolic pathway may differ, the endpoint (the amount of biomass) remains the same if operational stability is maintained. Full article
(This article belongs to the Special Issue Biomass and Waste Treatment Based on Anaerobic Digestion)
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12 pages, 1262 KiB  
Article
Anaerobic–Aerobic Treatment of Fruit and Vegetable Wastes and Municipal Wastewater
by Sergio Esteban Vigueras Carmona, Mariana García Valdés, Maura Selene Meléndez Rico and María Monserrat Montes García
Processes 2024, 12(7), 1326; https://doi.org/10.3390/pr12071326 - 26 Jun 2024
Cited by 1 | Viewed by 1358
Abstract
Waste management in large urban centers is one of the main challenges for public administration. Two of the most abundant wastes in cities are waste solid and municipal wastewater (MWW). Their management can be optimized if they are treated together. This work analyzed [...] Read more.
Waste management in large urban centers is one of the main challenges for public administration. Two of the most abundant wastes in cities are waste solid and municipal wastewater (MWW). Their management can be optimized if they are treated together. This work analyzed an anaerobic–aerobic system for the treatment of fruit and vegetable wastes (FVWs) and MWW. Firstly, FVWs were collected and characterized; once in the laboratory, they were placed in a tank with the MWW, aiming at transferring to the water those solids with a particle size below 105 µm; then, they were separated by sieving. The mixture of MWW and FVWs with a particle size below 105 µm was fed into an up-flow anaerobic sludge reactor (UASB); in the latter, dissolved and suspended organic matter was transformed into methane and carbon dioxide. The water that left the UASB was sent to be post-treated in an activated sludge reactor (ASR). The chemical oxygen demand (COD) was used as an evaluation parameter of the anaerobic–aerobic system; a removal efficiency higher than 80% was achieved, whereas it was 60% in the ASR. Another evaluation parameter was methane (CH4) productivity, with an average of 3.0 LCH4 L−1 d−1. VWF leaching achieved an average COD extraction of 7.68 kg∙m−3. The UASB efficiency was on average 70% for the assayed loads (2–8 kg COD·L−1·d−1). The energy potential calculated for the anaerobic–aerobic system was 510.2 kW∙h∙d−1 Full article
(This article belongs to the Special Issue Biomass and Waste Treatment Based on Anaerobic Digestion)
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