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  • 1
    Electronic Resource
    Electronic Resource
    Productivity of outdoor algal cultures in enclosed tubular photobioreactor (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 40 (1992), S. 1119-1122 
    Details
    ISSN: 0006-3592
    Keywords: growth irradiance ; specific growth rate ; output rate ; Chlorella pyrenoidosa ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: At quasi-steady-state outdoor cyclic fed batch cultures of Chlorella pyrenoidosa, the growth irradiance incidented on the tubular photobioreactor increased about fivefold between 9:00 a.m. and noon. Overheating of the cultures was observed, resulting in decreasing biomass output rate when culture temperature went above 40°C. In cultures with temperature control, the quasi-steady-state output rate of all cultures increased throughout the day and leveled off in the late afternoon in high-density cultures. The daily area output rate was proportional to the density of the cultures. The specific growth rate of the light-limited cultures increased only marginally (20%) in the morning. © 1992 John Wiley & Sons, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260400917
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  • 2
    Electronic Resource
    Electronic Resource
    Productivity of outdoor algal cultures in unstable weather conditions (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 41 (1993), S. 1003-1006 
    Details
    ISSN: 0006-3592
    Keywords: Chlorella pyrenoidosa ; biomass output ; bioenergetics growth yield ; unstable weather ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In the outdoor cyclic fed batch cultures of Chlorella pyrenoidosa, some typical growth kinetics patterns in unstable weather conditions were observed. On cloudy days, the biomass output rate (R) was low, but the bioenergetic growth yield (Y) was generally high. In the cloudy morning-sunny afternoon condition, the values of Y were low, especially in the afternoon. In the sunny morning-cloudy afternoon condition, both R and Y were high. A few very high short-term Y values were measured during the cloudy the cloudy afternoon. © 1993 Wiley & Sons, Inc.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260411012
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  • 3
    Electronic Resource
    Electronic Resource
    High CO2 partial pressure depresses productivity and bioenergetic growth yield of Chlorella pyrenoidosa culture (1991)
    Springer
    Journal of applied phycology 3 (1991), S. 95-101 
    Details
    ISSN: 1573-5176
    Keywords: dissolved CO2 partial pressure ; biomass output rate ; bioenergetic ; Chlorella pyrenoidosa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract When low-CO2 grown Chlorella pyrenoidosa (YSK strain) cells were exposed to high CO2 partial pressures (pCO2), the specific growth rate (μ) declined exponentially reaching a steady state value in about 20 h. A short interruption (up to 1 h) by temporarily lowering the pCO2 did not prevent the continuous decline in μ when high pCO2 was restored. In chemostate studies, light-limited cultures were supplied with 2 to 90 kPa of CO2. The steady state biomass production rate and bioenergetic growth yield were related inversely to pCO2 and the average energy uptake rate. The maintenance energy coefficient was, however, independent of dissolved pCO2 in the pCO2 range studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00003690
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of photobioreactor inclination on the biomass productivity of an outdoor algal culture (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 38 (1991), S. 995-1000 
    Details
    ISSN: 0006-3592
    Keywords: tubular-loop photobioreactor ; orientation ; Chlorella pyrenoidosa ; biomass productivity ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The profiles of photon flux density incidented on a tubularloop photobioreactor in the day could be altered by inclining the bioreactor at an angle with the horizontal. The photon flux density at noon decreased with increasing angle of inclination, whereas the photon flux density in the early morning and late afternoon increased with increasing angle of inclination. The overall photosynthetic radiance received by the bioreactor inclined at 0, 25, 45, and 80° was 1:0.89:0.77:0.62. Regardless of the angle of bioreactor inclination, the overall biomass output rate of a fed-batch culture over an 8-h/day period was comparable (26-36 g-biomass m-2 bioreactor surface area day-1). As a bioreactor inclined at an angle occupied smaller land area, and daily biomass output rate per land area of a bioreactor inclined at 80° (130 g-biomass m-2 land) was about six times of that obtainable at horizontal position (21-g biomass m-2 land). The bioenergetics growth yield from the absorbed photosynthetic radiance was not a constant but an inverse function of the photon flux density. The quasi-steady state chlorophyll content of the Chlorella cells varied between 36 and 63 mg g-1 cells. Photoinhibition of the maximum photosynthetic capacity was not observed in this study.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260380906
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