Cultivation of the heterotrophic microalga Galdieria sulphuraria on food waste: A Life Cycle Assessment
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In: Bioresource Technology, Vol. 340, 125637, 01.11.2021.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Cultivation of the heterotrophic microalga Galdieria sulphuraria on food waste
T2 - A Life Cycle Assessment
AU - Thielemann, Anne Karolin
AU - Smetana, Sergiy
AU - Pleissner, Daniel
PY - 2021/11/1
Y1 - 2021/11/1
N2 - The aim of this study was to perform a Life Cycle Assessment of a production process of 1 kg dry algal biomass powder (Galdieria sulphuraria) with 27 % (w/w) protein content for human consumption for optimizing the production regarding global warming potential and resource efficiency in combination with food waste utilization. It was investigated, underpinned by a comparison of the use of conventional glucose, whether and to what extent the environmental impact/global warming potential can be reduced by changing to food waste hydrolysate and how this can lead to a more sustainable use of resources and a sustainable development. Overall, the results showed that hydrolysis, along with freeze-drying, caused most of the overall impact. The carbon footprint associated with the use of hydrolyzed food waste was 11% higher than using conventional glucose and supplementary nutrients mainly driven by the high demand of energy for hydrolysis.
AB - The aim of this study was to perform a Life Cycle Assessment of a production process of 1 kg dry algal biomass powder (Galdieria sulphuraria) with 27 % (w/w) protein content for human consumption for optimizing the production regarding global warming potential and resource efficiency in combination with food waste utilization. It was investigated, underpinned by a comparison of the use of conventional glucose, whether and to what extent the environmental impact/global warming potential can be reduced by changing to food waste hydrolysate and how this can lead to a more sustainable use of resources and a sustainable development. Overall, the results showed that hydrolysis, along with freeze-drying, caused most of the overall impact. The carbon footprint associated with the use of hydrolyzed food waste was 11% higher than using conventional glucose and supplementary nutrients mainly driven by the high demand of energy for hydrolysis.
KW - Bioeconomy
KW - Food waste
KW - LCA
KW - Nutrient recovery
KW - Proteins
KW - Biology
UR - http://www.scopus.com/inward/record.url?scp=85111052755&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/98f4dfbf-86da-373c-81f5-54bc4df0aa38/
U2 - 10.1016/j.biortech.2021.125637
DO - 10.1016/j.biortech.2021.125637
M3 - Journal articles
C2 - 34315124
AN - SCOPUS:85111052755
VL - 340
JO - Bioresource Technology
JF - Bioresource Technology
SN - 0960-8524
M1 - 125637
ER -