Special Issue "Upstream and Downstream Processing of Biogas: From Production Technology to Performance Assessment"

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

Deadline for manuscript submissions: closed (15 December 2021) | Viewed by 3230

Special Issue Editors

Department of Engineering and Management, University of Padova, Stradella San Nicola, 36100 Vicenza, Italy
Interests: energy conversion plants; thermoeconomic analyses; emissions in biodiesel and biogas engines and boilers; health impact assessments; fluid power systems; hydromechanical and hybrid transmissions
Department of Industrial Engineering, University of Padova, 35131 Padova, Italy
Interests: energy; exergy and economic analyses; power plant design; optimization and dynamic modelling; waste heat recovery units; organic Rankine cycle; life cycle
Special Issues, Collections and Topics in MDPI journals
Department of Land, Environment, Agriculture and Forestry, University of Padova, 35020 Legnaro, Italy
Interests: agricultural and livestock engineering; rural buildings; agro-environmental sustainability; byproducts; biomass and renewable energies
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Biogas is an important source of energy for a sustainable transition.

Despite feedstock for biogas production are widespread all over the world and the multiple environmental benefits resulting from biogas use, only few European countries focused on this technology by introducing appropriate support policies. The reasons are not only economics, but also technical, social and environmental.

For developing countries, the availability of process water and the extensive use of energy crops for fuel production instead of food can lead to strong negative effects. Therefore, energy and policies must be based on precise agronomic and environmental assessments.

In developed countries, emissions during biogas production and utilization (odours, biogas leaks, spills in the ground and exhaust gases from chimneys) are source of concerns for the inhabitants living nearby a plant. Hence, extensive health impact assessments are needed for social acceptance of the biogas chain.

As a matter of fact, today the high investment costs and the low price of fossil fuels limit the spread of biogas technology. But, the development of more efficient production methods and adequate support policies can help to overcome these obstacles.

For these reasons, this special issue wants to focus on:

  • Upstream and downstream processing innovations: new energy crops, anaerobic digestion enhancements, exploitation of biogas as a fuel (ORC systems, fuel cells, biomethane)
  • Environmental sustainability evaluation by means of multidisciplinary impact analyses.
  • Health and Environmental impact assessments: evaluations of the damage caused by biogas production plants and by combustion in engines, gas turbines or other devices and effects on emissions regulations.

Prof. Dr. Alarico Macor
Prof. Dr. Alberto Benato
Prof. Dr. Andrea Pezzuolo
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.


  • Biogas technology innovations
  • Treatment and processing
  • Environmental sustainability
  • Health impact assessments
  • Biogas upgrades
  • Environmental-Economical-Social Sustainability indicators

Published Papers (1 paper)

Order results
Result details
Select all
Export citation of selected articles as:


13 pages, 2027 KiB  
Mesophilic Anaerobic Digestion of Hydrothermally Pretreated Lignocellulosic Biomass (Norway Spruce (Picea abies))
Processes 2021, 9(2), 190; https://doi.org/10.3390/pr9020190 - 20 Jan 2021
Cited by 8 | Viewed by 1725
Hot water extraction (HWE) removes hemicellulose from woody biomass to give improved end products while producing a sugar-rich by-product stream, which requires proper treatment before disposal. Hot water extracted Norway spruce (Picea abies) at two different pretreatment conditions (140 °C for [...] Read more.
Hot water extraction (HWE) removes hemicellulose from woody biomass to give improved end products while producing a sugar-rich by-product stream, which requires proper treatment before disposal. Hot water extracted Norway spruce (Picea abies) at two different pretreatment conditions (140 °C for 300 min (H140) and 170 °C for 90 min (H170)) generated hydrolysate as a by-product, which was used in mesophilic anaerobic digestion (AD) as substrate. H140 gave a higher methane yield (210 NmL/g COD—chemical oxygen demand) than H170 (148 NmL/g COD) despite having a lower concentration of sugars, suggesting that different levels of inhibitors (furans and soluble lignin) and recalcitrant compounds (soluble lignin) affected the methane yield significantly. Organic loads (OLs) had a negative effect on the methane yield, as observed during AD of H170, while such an effect was not observed in the case of H140. This suggests that the decrease in methane yield (32%) of H170 compared to H140 is primarily due to inhibitors, while the decrease in methane yield (19%) of H140 compared to the synthetic hydrolysate is primarily due to recalcitrant substances. Therefore, both OL and pretreatment conditions must be considered for efficient anaerobic digestion from hydrolysate for enhanced methane production. Full article
Show Figures

Graphical abstract

Back to TopTop