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Special Issue "Production and Utilization of Biogas"

A special issue of Energies (ISSN 1996-1073).

Deadline for manuscript submissions: 31 December 2018

Special Issue Editor

Guest Editor
Dr. Wojciech Budzianowski

Wojciech Budzianowski Consulting Services, Poleska 11/37, PL-51354 Wrocław, Poland
Website | E-Mail
Phone: +0048 792781784
Interests: renewable energy, biogas, innovation management, business development

Special Issue Information

Dear Colleagues,

Biogas, although it is a mature renewable energy technology, still requires financial incentivization of commercial plants or end uses. Shortages of locally-available, very cheap digestible feedstocks restrain biogas productivity, so that biogas plants with a capacity greater than 1 MW are difficult to construct and operate in truly competitive markets. Research into innovations that could improve economic viability and resource flexibility of biogas technology is therefore needed. Potential improvements must be sought in the whole value chain of biogas: Cheaper feedstock production and collection including wastes, enhanced fermentation techniques, novel products that can be derived from feedstock processing or biogas, new end uses, integration with other technologies, market organization, etc. This Special Issue aims at encouraging researchers to address challenges associated with biogas production and utilization. It seeks research reports and innovative solutions that could contribute to the further development of biogas technology. In addition, the submission of review papers that systematically evaluate advances in biogass production and utilizaton with an emphasis on technological excellence and realistic commercial potential are also invited.

Dr. Wojciech Budzianowski
Guest Editor

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 papers will be 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. Energies 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 1600 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

  • biogas
  • production
  • utilization
  • innovation
  • sustainability
  • technology
  • economics
  • value chain

Published Papers (1 paper)

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Research

Open AccessArticle Biogas from Fresh Spring and Summer Grass: Effect of the Harvesting Period
Energies 2018, 11(6), 1466; https://doi.org/10.3390/en11061466
Received: 3 May 2018 / Revised: 1 June 2018 / Accepted: 4 June 2018 / Published: 6 June 2018
PDF Full-text (3315 KB) | HTML Full-text | XML Full-text
Abstract
Yard trimmings, landscape management and agricultural practices determine the collection of biomass currently destined mainly to the production of a valuable soil amendant by composting. While composting requires energy, especially for the turning/aeration phases and for air treatment (i.e., biofilters in the case
[...] Read more.
Yard trimmings, landscape management and agricultural practices determine the collection of biomass currently destined mainly to the production of a valuable soil amendant by composting. While composting requires energy, especially for the turning/aeration phases and for air treatment (i.e., biofilters in the case of enclosed systems), anaerobic digestion represents an energy positive process that results in production of biogas and digestate, which can be used as fuel and fertilizer, respectively. The focus of the present research was the evaluation of biogas and methane potential of grass collected in two different periods of the year (spring and summer) from riverbanks located in Northern Italy. The conversion to biogas of feedstocks is greatly influenced by the composition of the organic matter, content of cellulose, and lignin in particular. The production of biomass per hectare and the consequent biogas production were also evaluated. The experimental tests were performed on both samples of fresh grass in laboratory scale batch reactors, characterized by 4.0 L of volume and operated in mesophilic conditions (38 °C), for 40 days per cycle. The anaerobic digestion process was performed on a mixture of inoculum and grass, characterized by inoculum:substrate VS (volatile solids) ratio equal to 2. The inoculum was represented by digestate from a full-scale anaerobic digestion plant fed with dairy cow manure. The results in terms of biogas production, biogas quality (CH4, CO2, H2S), and emissions from digestates (NH3, CO2 and CH4) are presented in the paper. Total solids (TS), volatile solids (VS), pH, volatile fatty acids (VFA), alkalinity, acidity vs. alkalinity ratio, fibers (cellulose, lignin), and total Kjieldahl nitrogen (TKN) were determined both on input and output of the process. The biogas yield obtained from grass resulted higher than expected, quite similar to the yield obtained from energy crops, with Biomethane Potential (BMP) of 340.2 NL·kg−1VS and of 307.7 NL·kg−1VS, respectively, for spring and summer grass. Biogas quality was slightly lower for summer grass, perhaps in relation to the higher content of fibers (lignin). Alternatively, the yield of grass per surface was significantly different between spring and summer with the highest production in the summer. In fact, the results revealed a methane yield of 263 Nm3·ha−1 and of 1181 Nm3·ha−1, respectively for spring and summer grass. Full article
(This article belongs to the Special Issue Production and Utilization of Biogas)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Production Techniques And Energetic Performance of Biogas In Rural Environment. A Review
Authors: Alvaro Ramirez Gomez; email: alvaro.ramirez@upm.es
Abstract: The use of biogas produces a global benefit by reducing emissions of greenhouse gases such as CO2 and CH4. In rural areas, it is a substitute for conventional solid or liquid fuels such as kerosene or firewood, which contributes to the improvement of people's quality of life, and reduces the negative impact of the use of chemical fertilizers due to the accumulation of heavy metals in soil and groundwater.
The biogas has a calorific value between 16-20 MJ/m3 depending on the organic waste from which it is produced and the content of nutrients (proteins, fats, carbohydrates) in the substrates. It represents a low cost energy alternative, being used as fuel in kitchens, for heat generation and lighting in rural industries and production of electric power for small engines. Thus, for example, in countries such as China, India and Nepal, biogas is commonly used.
This work will present an exhaustive review of the factors that affect the performance of the process of generation and consumption of biogas in the rural environment. Aspects such as production rate and biogas quality per unit of potentially digestible material are addressed, depending on their composition, type of digester, pretreatments and operating conditions, as well as the performance obtained in its various applications for heating water, heating, steam generation and electricity production. We analyze the means used and available for the generation of biogas in rural areas, such as bags, buried drums and reactors, as well as operating variables such as temperature (optimum around 35 ºC), and maintenance of the acid-base balance during the digestion process (pH 6.6-7.6). In addition, the parameters of operation and energetic performance of rural consumption devices and domestic appliances (stoves and kitchens) are reviewed, conditioned by factors such as methane content (50-70%), relative density (0.7-0.9) of the biogas generated, as well as its supply pressure (around 10 bar).

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