海産クロレラ培養水への通気効果に関する2・3の吟味試験

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タイトル別名
  • カイサン クロレラ バイヨウミズ エ ノ ツウキ コウカ ニ カンスル 2 3
  • Eflects of Aeration Volume on the Growth of Marine Chlorella in Culture
  • カイサン クロレラ バイヨウスイ エノ ツウキ コウカ ニ カンスル 2 ･ 3 ノ ギンミ シケン

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It is well known that aeration is an important practice in the cultivation of fish or plankton, andis commonly used by many aquaculturists. Practice of the aeration is simple but the mechanismsare complicated. Since HIRATA designed the movable aerator in 1969, study on the biological features of the aeration has become more clamorous.In this experiment, direct (Exp. I) andindirect (Exp. II) effects of aeration volume upon the growth of marine Chlorella were observed.All the experiments were carried out by using 2 l polyethylene bottles with　1 liter of culture medium.HIRATA's inorganic medium-II (HIRATA ; 1964) and active sludge as an organicmedium based on soy-cake particles (HIRATA, et al.; 1973) were used in Exp. I and II, respectively.The air volume was subdivided into six rates ranging from 72 to 5040 liters per day.As a control experiment, soda-lime was employed for removing carbon dioxide from the air supplied.In Exp. I, growth of Chlorella at the rates of 72, 288, 720 and 1440 liters of air supply per daywere 18, 42, 44 and 49×10^<6> cells/ml, respectively. Therefore, optimum air volume was estimated to be about 300l/day from those results. In Exp. II, the Chlorella grew up to 4.4×10^<6>cells/ml in the medium of air supplied sludge, but no growth was found in the tank preparedwith the sludge with no air supplied.

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