Investigation of the carbon footprint of the cultivation of the heterotrophic microalga Galdieria sulphuraria on hydrolyzed straw and digestate
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In: Sustainable Chemistry for the Environment, Vol. 6, 100087, 01.06.2024.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Investigation of the carbon footprint of the cultivation of the heterotrophic microalga Galdieria sulphuraria on hydrolyzed straw and digestate
AU - Heidorn, Jonte Rasmus
AU - Smetana, Sergiy
AU - Pleißner, Daniel
N1 - Publisher Copyright: © 2024 The Authors
PY - 2024/6/1
Y1 - 2024/6/1
N2 - The purpose of this study was to assess the carbon footprint of a production process for 1 kg of dry algal biomass powder (Galdieria sulphuraria) cultivated on straw and digestate as carbon and nitrogen sources, respectively, for further optimization. It was examined whether and to what extent the use of straw and digestate can reduce the environmental impact (global warming and resource efficiency) and how this can result in a more sustainable use of resources. The investigated process was compared to a process where conventional glucose serves as a carbon source. The findings demonstrate that the hydrolysis of straw results in a worst environmental impact compared to the conventional process. Hydrolysis alone releases approx. 8 kg CO2-eq., which is predominantly caused by the energy demand. The results of this study therefore clearly revealed that the hydrolysis of straw needs to be optimized to foster a sustainable use of agriculture residues.
AB - The purpose of this study was to assess the carbon footprint of a production process for 1 kg of dry algal biomass powder (Galdieria sulphuraria) cultivated on straw and digestate as carbon and nitrogen sources, respectively, for further optimization. It was examined whether and to what extent the use of straw and digestate can reduce the environmental impact (global warming and resource efficiency) and how this can result in a more sustainable use of resources. The investigated process was compared to a process where conventional glucose serves as a carbon source. The findings demonstrate that the hydrolysis of straw results in a worst environmental impact compared to the conventional process. Hydrolysis alone releases approx. 8 kg CO2-eq., which is predominantly caused by the energy demand. The results of this study therefore clearly revealed that the hydrolysis of straw needs to be optimized to foster a sustainable use of agriculture residues.
KW - GHG emissions
KW - Agricultural residues
KW - Nutrient recovery
KW - Resources
KW - Bioeconomy
KW - Biology
UR - http://www.scopus.com/inward/record.url?scp=85189835206&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/18958117-fd88-30ed-9961-017ec01f2234/
U2 - 10.1016/j.scenv.2024.100087
DO - 10.1016/j.scenv.2024.100087
M3 - Journal articles
VL - 6
JO - Sustainable Chemistry for the Environment
JF - Sustainable Chemistry for the Environment
SN - 2949-8392
M1 - 100087
ER -