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Canizales S, Chen PH, Temmink H, Wijffels RH, Janssen M. Cyanobacteria cultivation on human urine for nutrients recovery. ALGAL RES 2023. [DOI: 10.1016/j.algal.2023.103064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Trentin G, Piazza F, Carletti M, Zorin B, Khozin-Goldberg I, Bertucco A, Sforza E. Fixing N2 into cyanophycin: continuous cultivation of Nostoc sp. PCC 7120. Appl Microbiol Biotechnol 2022; 107:97-110. [DOI: 10.1007/s00253-022-12292-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 11/02/2022] [Accepted: 11/08/2022] [Indexed: 11/28/2022]
Abstract
Abstract
Two diazotrophic cyanobacteria (Anabaena cylindrica PCC 7122 and Nostoc sp. PCC 7120) were cultivated to produce cyanophycin, a nitrogen reserve compound, under nitrogen fixing conditions. In preliminary continuous experiments, Nostoc sp. was shown to be more efficient, accumulating a higher amount of cyanophycin and showing a greater capability to fix atmospheric nitrogen in the biomass (67 mgN d−1 of fixed nitrogen per liter of culture). The operating conditions were then optimized to maximize the cyanophycin productivity: the effect of incident light intensity, residence time and nitrogen availability were investigated. Nitrogen availability and/or pH played a major role with respect to biomass production, whereas phosphorus limitation was the main variable to maximize cyanophycin accumulation. In this way, it was possible to achieve a stable and continuous production of cyanophycin (CGP) under diazotrophic conditions, obtaining a maximum cyanophycin productivity of 15 mgCGP L−1 d−1.
Key points
• Diazotrophic cyanobacteria produce stable amount of cyanophycin in continuous PBR.
• Nostoc sp. proved to be more efficient in producing cyanophycin than Anabaena sp.
• P deprivation is the major variable to increase cyanophycin productivity in continuous.
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Pastore M, Primavera A, Milocco A, Barbera E, Sforza E. Tuning the Solid Retention Time to Boost Microalgal Productivity and Carbon Exploitation in an Industrial Pilot-Scale LED Photobioreactor. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Martina Pastore
- Interdepartemental Centre Giorgio Levi Cases, University of Padova, Via Marzolo 9, 35131 Padova, Italy
| | - Alessandra Primavera
- Danieli and C. Officine Meccaniche S.p.A., Via Nazionale 41, Buttrio 33042, UD, Italy
| | - Alessio Milocco
- Danieli and C. Officine Meccaniche S.p.A., Via Nazionale 41, Buttrio 33042, UD, Italy
| | - Elena Barbera
- Department of Industrial Engineering DII, University of Padova, Via Marzolo 9, 35131 Padova, Italy
| | - Eleonora Sforza
- Department of Industrial Engineering DII, University of Padova, Via Marzolo 9, 35131 Padova, Italy
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