Biogas Production Systems and Upgrading Technologies: A Review
1University of Zagreb, Faculty of Food Technology and Biotechnology, Pierottijeva 6, HR-10000 Zagreb, Croatia
2Belarussian National Technical University, Mining Engineering and Engineering Ecology Faculty, Nezavisimosti Ave. 65, BY-220013 Minsk, Belarus
Received: 30 April 2021
Accepted: 13 October 2021
anaerobic digestion, biogas production, anaerobic bioreactor configurations, purification and upgrading technologies, digestate
The underutilized biomass and different organic waste streams are today in the focus of research for renewable energy production due to the effusive use of fossil fuels and greenhouse gases emission. In addition, one of the major environmental problems is also a constant increase of the number of organic waste streams. In lot countries, sustainable waste management, including waste prevention and reduction, has become a priority as a means to reduce pollution and greenhouse gas emission. To provide solutions for both energy-related and environmental tasks, application of biogas technologies is one of the promising solutions. This review is aimed to present conventional and novel biogas production systems, as well as purification and upgrading technologies, nowadays applicable in the large scale, with a special focus on the CO2 and H2S removal. It also gives an overview of feedstocks and prominent parameters for biogas production, together with the digestate utilization and application of molecular biology in order to improve the biogas production.