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Biogas Production Systems and Upgrading Technologies: A Review 

Martina Andlar1orcid tiny, Halina Belskaya2orcid tiny, Galina Morzak2orcid tiny, Mirela Ivančić Šantek1orcid tiny, Tonči Rezić1orcid tiny, Vlatka Petravić Tominac1orcid tiny and Božidar Šantek1*orcid tiny

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

Article history:

Received: 30 April 2021

Accepted: 13 October 2021

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Key words:

aanaerobic digestion, biogas production, different anaerobic bioreactor systems, biogas purification and upgrading technologies, digestate


The underutilized biomass and different organic waste streams are nowadays in the focus of research for renewable energy production due to the effusive use of fossil fuels and greenhouse gas emission. In addition, one of the major environmental problems is also a constant increase of the number of organic waste streams. In a lot of countries, sustainable waste management, including waste prevention and reduction, has become a priority as a means to reduce pollution and greenhouse gas emission. Application of biogas technology is one of the promising methods to provide solutions for both actual energy-related and environmental problems. This review aims to present conventional and novel biogas production systems, as well as purification and upgrading technologies, nowadays applicable on a large scale, with a special focus on the CO2 and H2S removal. It also gives an overview of feedstock and the parameters important for biogas production, together with digestate utilization and application of molecular biology in order to improve the biogas production.

*Corresponding author: +38514605290

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