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Author |
Alloul, A.; Muys, M.; Hertoghs, N.; Kerckhof, F.-M.; Vlaeminck, S.E. |
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Title |
Cocultivating aerobic heterotrophs and purple bacteria for microbial protein in sequential photo- and chemotrophic reactors |
Type |
A1 Journal article |
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Year |
2021 |
Publication |
Bioresource Technology |
Abbreviated Journal |
Bioresource Technol |
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Volume |
319 |
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Pages |
124192 |
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Keywords |
A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
Aerobic heterotrophic bacteria (AHB) and purple non-sulfur bacteria (PNSB) are typically explored as two separate types of microbial protein, yet their properties as respectively a bulk and added-value feed ingredient make them appealing for combined use. The feasibility of cocultivation in a sequential photo- and chemotrophic approach was investigated. First, mapping the chemotrophic growth kinetics for four Rhodobacter, Rhodopseudomonas and Rhodospirillum species on different carbon sources showed a preference for fructose (µmax 2.4–3.9 d−1 28 °C; protein 36–59%DW). Secondly, a continuous photobioreactor inoculated with Rhodobacter capsulatus (VFA as C-source) delivered the starter culture for an aerobic batch reactor (fructose as C-source). This two-stage system showed an improved nutritional quality compared to AHB production: higher protein content (45–71%DW), more attractive amino/fatty acid profile and contained up to 10% PNSB. The findings strengthen protein production with cocultures and might enable the implementation of the technology for resource recovery on streams such as wastewater. |
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Wos |
000613136600013 |
Publication Date |
2020-09-30 |
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ISSN |
0960-8524 |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
5.651 |
Times cited |
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Open Access |
OpenAccess |
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Notes |
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Approved |
Most recent IF: 5.651 |
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Call Number |
UA @ admin @ c:irua:171766 |
Serial |
7677 |
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Permanent link to this record |