Beyond energy crops and subsidised electricity – A study on sustainable biogas production and utilisation in advanced energy markets

Geospatial Analysis and Environmental Impact Assessment of a Holistic and Interdisciplinary Approach to the Biogas Sector

“…4 times better in terms of environmental performance than the production of heat and electricity in cogeneration mode. The results of this research can be related to a previous study by the authors in which the integration of a biogas upgrading unit into an existing biogas power plant was analysed to investigate a switch from maize silage to residue grass with the aim of mutually producing biomethane and electricity at peak power prices [11]. For that case, the thresholds for environmental benefits were determined to be −3.6 mPt and −14.0 mPt, for 1 m 3 of produced and utilised CH 4 , respectively.…”

“…This study revealed that locally available residue material, such as grass, with no actual cost of materials (except harvesting and transport, which are in total estimated at ca. 16 EUR/t [11]), could replace maize silage in the actual biogas production within the same, and even lower, transportation distances. Therefore, biogas plant no.12 was selected to be further evaluated in the LCA by replacing maize silage with residue grass and utilising biogas for biomethane instead for electricity and heat generation.…”

“…The distance determines the economic feasibility regarding whether biomethane would be injected into the natural gas grid or stored on-site as a compressed gas. Overall, it would determine the further utilisation of biomethane, as well as its price [11]. Biogas plants nos.…”

“…The earliest of these biogas plants are near the completion of their subsidised operation, as these subsidies were granted for 12-20 years, depending on the country [10]. In the post-subsidy era, the operation of biogas plants on the day-ahead market could only be viable in the case of low-cost feedstocks or by implementing the feedstock gate fee business model [11]. Among the most likely alternatives after the expiry of subsidies are biogas upgrading, the production of biomethane [12] and/or the integration of the power-to-gas (P2G) concept using variable electricity from wind and solar to produce e-methane [13].…”

Fotobiyoreaktörde Işığın ve Beslemenin Alglerin Büyümeleri Üzerine Etkilerinin Araştırılması

“…Küresel ısınmayı kontrol altına alabilmek ve doğaya salınan karbondioksit miktarının azaltılması için alternatif yenilenebilir çözümlere ihtiyaç duyulmaktadır. Güneş enerjisi, biyodizel, biyogaz, rüzgâr, dalga enerjisi gibi alternatif yenilenebilir enerji kaynaklarının sürdürülebilir olması küresel ısınmanın etkilerini azaltarak dünya ekosisteminin tekrar düzeltilebilmesine olanak sağlamaktadır (Bedoi et al, 2020;Oğuz Yunus et al, 2010;Patel et al, 2020;Zhang et al, 2020;Zhoua et al, 2021). Alternatif kaynakların eldesinde küresel ısınmaya sebep olan karbondioksitin Sera gazı etkisini azaltabilmek için kullanılan yöntemlerinde sürdürülebilir olması gerekmektedir.…”