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  • influence of the co2 absorbent monoethanolamine on growth and carbon fixation by the green alga scenedesmus sp.

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 580
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    • شماره تماس دبیرخانه رویداد: -
     the influence of monoethanolamine (mea) as a co2 absorbent on photoautotrophic culture of co2-fixing microalgae was investigated. when 300 ppm mea (4.92 mm) was added to blank culture medium, the dissolved inorganic carbon and the molar absorption ratio increased to 51.0 mg/l and 0.34 molco2/molmea, respectively, which was an almost 6-fold increase in co2 solubility. when free mea up to 300 mg/l was added to a green alga scenedesmus sp. culture that was supplied 5% (v/v) co2 at 0.1 vvm, both cell growth rate and final cell density were enhanced compared to when no mea was added. the cell growth rate reached 288.6 mg/l/d, which was equivalent to 539.6 mg-co2/l/d as a co2-fixation rate and enhancement of about 63.0% compared to not adding mea. chlorophyll-a content and nitrate consumption rate increased correspondingly. mea doses higher than 400 mg/l inhibited cell growth, probably due to toxicity of the carbamate intermediate.

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