|標題:||利用氫氣自營性薄膜生物脫硝反應槽去除水源中硝酸鹽之研究||作者:||曾四恭||關鍵字:||自營脫硝;薄膜生物反應槽;生物膜;硝酸鹽;Autotrophy;denitr ification;membrane bioreactor;nitrate||公開日期:||31-七月-2002||出版社:||臺北市：國立臺灣大學環境工程學研究所||摘要:||本研究嘗試開發一以矽膠管作為供氣系
硝速率。以純菌（ Alcaligenes eutrophus）
Biological denitrification of wastewater with heterotrophic microorganisms has been a widely applied treatment because of its high efficiency and low cost. However, residual carbon from this process causes many problems in drinking-water treatment. These problems make autotrophic denitrification by hydrogen oxidizing bacteria a good alternative. In addition to using hydrogen gas, which is harmless to humans and clean as an energy source, the bacteria also draw on inorganic carbon, which removes any problems residual organic carbon may cause. A laboratory-scale autotrophic membrane-attached biofilm reactor was developed to remove nitrate from drinking water. Hydrogen and carbon dioxide flowed together into the lumem side of a gas-permeable silicone tube. The gases diffused through the membrane wall to feed the denitrifying bacteria that formed a biofilm on the surface of the silicone tube for autotrophic denitrification. Hydrogen provided the energy source, and carbon dioxide, besides serving as the carbon source, was employed to neutralize the alkalinity from denitrification. The experimental results indicated that there was no significant difference between using pure culture （ Alcaligenes eutrophus）or sludge to start the bioreactor. Supplying a suitable amount of carbon dioxide together with hydrogen into the silicone tube solved the problem that alkalinity formation caused during denitrification, and then the nitrogen removal rate was increased. In addition, nitrate removal efficiency had a positive relationship to the length of the silicone tube, made the bioreactor more flexible for actual application.
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