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Integration of Anaerobic Digestion Technologies within Waste Management

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A4: Bio-Energy".

Deadline for manuscript submissions: closed (31 October 2021) | Viewed by 3356

Special Issue Editor


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Guest Editor
Univ. Bretagne Sud, UMR CNRS 6027, IRDL, F-56300, Pontivy, France
Interests: sludge treatment; waste management; environmental engineering; methane production

Special Issue Information

Anaerobic digestion is now supposed to meet the energy, fertilization and production challenges of biobased molecules by controlling greenhouse gas and contaminant emissions to reduce environmental and health impacts. Anaerobic digestion is used as a waste valorization method for the production of renewable energy (electricity, heat or combustible gas recovered directly or after purification and injection). A lot of research in engineering and energy sciences is also focusing on the integration of anaerobic digestion in smart grids for energy storage and conservation. The productivities and social advantages of different biogas production units may vary depending on feedstock (water and organic matter contents) and their production scale (industrial, centralized territorial and on-farm anaerobic digestion or microscaled biogas production for domestic energy use). Anaerobic digestion is developed mainly from inputs that do not compete with human or animal food. This results in a great diversity of organic co-products and waste requiring specific adaptations and/or developments concerning both anaerobic digestion processes and pre-treatment adapted to local regulatory constraints. The associated energy and economic gains depend on technologies in a context of inexpensive waste with high methanogenic potential scarce. The aim of this Special Issue is to provide an overview of research advances in technologies, process integration, their contribution to bioeconomy, and feedback from different practice of waste valorization for biogas production.

Dr. Lendormi Thomas
Guest Editor

Manuscript Submission Information

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Keywords

  • biogas production technologies
  • biowaste management
  • energy assessment
  • process integration
  • sustainable integrated approach

Published Papers (1 paper)

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Research

20 pages, 17333 KiB  
Article
Conventional and Innovative Hygienization of Feedstock for Biogas Production: Resistance of Indicator Bacteria to Thermal Pasteurization, Pulsed Electric Field Treatment, and Anaerobic Digestion
by Xiaojun Liu, Thomas Lendormi and Jean-Louis Lanoisellé
Energies 2021, 14(7), 1938; https://doi.org/10.3390/en14071938 - 31 Mar 2021
Cited by 10 | Viewed by 2819
Abstract
Animal by-products (ABP) can be valorized via anaerobic digestion (AD) for biogas energy generation. The digestate issued from AD process is usually used to fertilize farming land for agricultural activities, which may cause potential sanitary risk to the environment. The European Union (EU) [...] Read more.
Animal by-products (ABP) can be valorized via anaerobic digestion (AD) for biogas energy generation. The digestate issued from AD process is usually used to fertilize farming land for agricultural activities, which may cause potential sanitary risk to the environment. The European Union (EU) requires that certain ABP be thermally pasteurized in order to minimize this sanitary risk. This process is called hygienization, which can be replaced by alternative nonthermal technologies like pulsed electric field (PEF). In the present study, Enterococcus faecalis ATCC 19433 and Escherichia coli ATCC 25922 were used as indicator bacteria. Their resistance to thermal pasteurization and PEF treatment were characterized. Results show that Ent. faecalis and E. coli are reduced by 5 log10 in less than 1 min during thermal pasteurization at 70 °C. The critical electric field strength was estimated at 18 kV∙cm−1 for Ent. faecalis and 1 kV∙cm−1 for E. coli. “G+” bacteria Ent. faecalis are generally more resistant than “G−” bacteria E. coli. AD process also plays an important role in pathogens inactivation, whose performance depends on the microorganisms considered, digestion temperature, residence time, and type of feedstock. Thermophilic digestion is usually more efficient in pathogens removal than mesophilic digestion. Full article
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