Heterotrophic cultivation of Galdieria sulphuraria under non-sterile conditions in digestate and hydrolyzed straw
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In: Bioresource Technology, Vol. 337, 125477, 01.10.2021.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Heterotrophic cultivation of Galdieria sulphuraria under non-sterile conditions in digestate and hydrolyzed straw
AU - Pleissner, Daniel
AU - Lindner, Astrid Victoria
AU - Händel, Nicole
PY - 2021/10/1
Y1 - 2021/10/1
N2 - Non-sterile heterotrophic cultivation of Galdieria sulphuraria in presence of digestate as well as straw after hydrolysis was investigated. G. sulphuraria can be grown in pure digestate at rates of 0.9 day−1 with glucose. However, a proteolytic treatment of digestate resulted in increased growth rates (1.2 day−1) and doubled cell concentrations. Furthermore, G. sulphuraria can utilize glucose obtained after straw hydrolysis. Biomass yields in glucose limited cultures were around 0.9 g per g glucose, while only 0.2 g biomass was formed per g glucose in glucose sufficient cultures. Biomass composition (w/w) of G. sulphuraria grown in digestate supplemented with straw hydrolysate consisted of 20% carbohydrates, 37% proteins and 3% lipids. This study revealed the potential to utilize agricultural waste streams to form algal biomass rich in proteins and may pave the way to novel utilization strategies to be implemented in rural areas.
AB - Non-sterile heterotrophic cultivation of Galdieria sulphuraria in presence of digestate as well as straw after hydrolysis was investigated. G. sulphuraria can be grown in pure digestate at rates of 0.9 day−1 with glucose. However, a proteolytic treatment of digestate resulted in increased growth rates (1.2 day−1) and doubled cell concentrations. Furthermore, G. sulphuraria can utilize glucose obtained after straw hydrolysis. Biomass yields in glucose limited cultures were around 0.9 g per g glucose, while only 0.2 g biomass was formed per g glucose in glucose sufficient cultures. Biomass composition (w/w) of G. sulphuraria grown in digestate supplemented with straw hydrolysate consisted of 20% carbohydrates, 37% proteins and 3% lipids. This study revealed the potential to utilize agricultural waste streams to form algal biomass rich in proteins and may pave the way to novel utilization strategies to be implemented in rural areas.
KW - Agricultural residues
KW - Anaerobic digestion
KW - Digestate
KW - Hydrolysis
KW - Straw
KW - Biology
UR - http://www.scopus.com/inward/record.url?scp=85109439343&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2021.125477
DO - 10.1016/j.biortech.2021.125477
M3 - Journal articles
C2 - 34320757
AN - SCOPUS:85109439343
VL - 337
JO - Bioresource Technology
JF - Bioresource Technology
SN - 0960-8524
M1 - 125477
ER -