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Guedes VC, Lombardi AT, Horta ACL. Polychromatic controller of photosynthetically active radiation applied to microalgae. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2023. [DOI: 10.1007/s43153-022-00298-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Lee HS, Kim ZH, Park H, Lee CG. Specific light uptake rates can enhance astaxanthin productivity in Haematococcus lacustris. Bioprocess Biosyst Eng 2016; 39:815-23. [DOI: 10.1007/s00449-016-1561-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 02/01/2016] [Indexed: 11/24/2022]
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Lee HS, Seo MW, Kim ZH, Lee CG. Determining the best specific light uptake rates for the lumostatic cultures in bubble column photobioreactors. Enzyme Microb Technol 2006. [DOI: 10.1016/j.enzmictec.2005.11.038] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Choi SL, Suh IS, Lee CG. Lumostatic operation of bubble column photobioreactors for Haematococcus pluvialis cultures using a specific light uptake rate as a control parameter. Enzyme Microb Technol 2003. [DOI: 10.1016/s0141-0229(03)00137-6] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Sanchez O, van Gemerden H, Mas J. Description of a redox-controlled sulfidostat for the growth of sulfide-oxidizing phototrophs. Appl Environ Microbiol 1996; 62:3640-5. [PMID: 16535417 PMCID: PMC1388955 DOI: 10.1128/aem.62.10.3640-3645.1996] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This paper describes a novel type of continuous culture for the growth of phototrophic sulfur oxidizers under constant concentrations of hydrogen sulfide. The culture maintains a constant concentration of sulfide despite possible variations in external factors likely to affect photosynthetic activity. Variations in biological activity lead to small departures from the steady-state concentration of hydrogen sulfide which result in variations of the redox potential. These changes in redox, monitored through a redox controller, modulate the rate at which the medium is pumped into the culture and therefore govern the dilution rate. As a result, when changes in external factors such as the light supply occur, the dilution rate of the culture adjusts to the new rate of sulfide oxidation, while maintaining a virtually constant concentration of hydrogen sulfide. The system has been successfully tested for an extended period of several weeks and under conditions of shifting illumination (868 to 113, 113 to 23, and 23 to 7 (mu)E(middot)m(sup-2)(middot)s(sup-1)). After changes in illumination, a transition to a new dilution rate started immediately, reaching a new equilibrium in less than 3 h.
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