Biogas is mainly produced from the anaerobic fermentation of biomass, containing methane
with an extensive range between about 50% and 70%. Higher methane content biogas has …

Ex-situ biomethanation is an emerging technology that facilitates the use of surplus
renewable electricity and valorizes carbon dioxide (CO 2) for biomethane production by …

Two-stage anaerobic digestion (TSAD) systems have been studied on a laboratory scale for
about 50 years. However, they have not yet reached industrial scale despite their potential …

High impurity concentration of biogas limits its wide commercial utilization. Therefore, the
integration of two-stage anaerobic digestion process with in situ biogas upgrading …

The current study investigated the effect of elevating gas pressure on biomethanation in
trickle-bed reactors (TBRs). The increased pressure led to successful biomethanation (CH …

Biochar addition in anaerobic digesters is an emerging technique for enhancing high-solids
anaerobic digestion. Recycling of biochar can further enhance performance and reduce …

Vegetable waste is one of the major organic residues available for sustainable bioenergy
production. The aim of this work is to study the influence of pH-value on process stability …

The flexibilization of bioenergy production has the potential to counteract partly other
fluctuating renewable energy sources (such as wind and solar power). As a weather …

The advantages of anaerobic digestion (AD) technology in organic solid waste treatment for
bioenergy recovery are evidenced in worldwide. Recently, more attention has been paid to …

Auto-generative high pressure digestion (AHPD) and hydrogen-injecting digestion (HID)
have been introduced to directly produce high CH 4-content biogas from anaerobic digester …