Heterotrophic growth of Galdieria sulphuraria on residues from aquaculture and fish processing industries
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Authors
The study aimed at zero-waste utilization of fish processing streams for cultivation of microalgae Galdieria sulphuraria. Wastewater from a fish processing facility, slam (mix of used fish feed and faeces), and dried pellet (sediments after enzymatic hydrolysis of rainbow trout) were investigated as potential sources of carbon, nitrogen, and phosphate for cultivation of G. sulphuraria. The pellet extract was found to support the growth of G. sulphuraria when appropriate diluted, at concentrations below 40 % (v/v). It was revealed that wastewater does not impact the growth negatively, however free amino nitrogen and carbon sources need to be supplied from another source. Therefore, only proteolyzed pellet extract (20 %, v/v) was selected for upscaling and a biomass concentration of 80 g L−1 (growth rate was 0.72 day−1) was achieved in a non-sterile fed-batch culture. Even though biomass was produced under non-sterile conditions no pathogens such as Salmonella sp. could be detected.
Original language | English |
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Article number | 129281 |
Journal | Bioresource Technology |
Volume | 384 |
Number of pages | 8 |
ISSN | 0960-8524 |
DOIs | |
Publication status | Published - 01.09.2023 |
Bibliographical note
Publisher Copyright:
© 2023 The Author(s)
- Waste Management and Disposal
- Bioengineering
- Environmental Engineering
- Renewable Energy, Sustainability and the Environment
ASJC Scopus Subject Areas
- SDG 12 - Responsible Consumption and Production
- SDG 6 - Clean Water and Sanitation
- SDG 14 - Life Below Water
- SDG 7 - Affordable and Clean Energy
Sustainable Development Goals
- Algal biomass, Bioeconomy, Bioprocess, Fish processing, Protein residues
- Biology