查詢結果分析
相關文獻
- The Optimum Condition for Autotrophic Denitrification by Paracoccus Denitrificans
- 飲用水含氮污染物處理技術(3):離子交換脫氮
- Autotrophic Denitrification Via a Biofilm Growing on a Gas-Permeable Silicone Tube
- Treatment of High-Strength Nitrate Wastewater in Different Biological Denitrification Systems
- 氫氣的簡易製法與氫氣槍
- 用之不竭的乾淨氫氣能源
- 豬舍主要臭氣成份之生物處理研究
- 電路板廢水生物處理之經驗
- 遮陰及氮肥對芥藍菜硝酸鹽累積之影響
- 以電漿濺鍍技術製備鈀-銀合金薄膜於氫氣分離之研究
頁籤選單縮合
題 名 | The Optimum Condition for Autotrophic Denitrification by Paracoccus Denitrificans=以Paracoccus denitrificans進行自營脫氮之最佳條件探討 |
---|---|
作 者 | 張志誠; 曾四恭; | 書刊名 | 中國環境工程學刊 |
卷 期 | 8:3 1998.09[民87.09] |
頁 次 | 頁233-238 |
分類號 | 445.463 |
關鍵詞 | 自營脫氮; 硝酸鹽; 氫氣; 生物處理; Autotrophic denitrification; Paracoccus denitrificans; Nitrates; Hydrogen; Biological treatment; |
語 文 | 英文(English) |
中文摘要 | 本研究旨在探討pH、無機碳源、硝酸鹽濃度、氧氣及氫氣等,對Paracoccus denitrificans 自營脫氮之影響。研究結果發現,在影響脫氮作用的因子中,以 ph 值之影 響最為重要, PH 對亞硝酸鹽之累積有重大的影響,適合 Paracoccus denitrificans 進行 脫氮之 pH 約為 7.0 ∼ 8.5。 無機碳源在此研究中並無重大的影響,試驗菌種在進行自營 脫氮時, 並不需要有太多之無機碳 (CO �� or HCO- �� ),C/N 比為 1 時已經足夠生長需 求。 在氫氣的影響方面,Paracoccus denitrificans 在缺乏氫氣的狀況下,依然可維持約 2 小時之脫氮作用, 推測其原因可能為其具有合成 PHB 之能力所致, 在缺乏能源下, 以 PHB 進行脫氮作用。在氧氣的影響方面,無氧狀態下脫氮速率最快;氧氣分壓在 2-20 %時 ,脫氮速率約降低 50 %;氧氣分壓超過 20 %則脫氮速率再次下降。當亞硝酸鹽存在時, 並不會對硝酸鹽降解產生抑制現象因此硝酸鹽與亞硝酸鹽之脫氮反應,應為互相競爭電子之 關係。 |
英文摘要 | Using Paracoccus denitrificans under autotrophic conditions, this study investigates how factors, such as pH, inorganic carbon, nitrate concentration. hydrogen gas and oxygen concentration, influence dentrification. Our results indicate that, among those factors, pH has the greatest influence on denitrification and, also, significantly influences the nitrate removal rate and the accumulation of nitrite. The optimal pH for autotrophic denitrification with Paracoccus denitrificans ranges from 7.5 to 8.5. Inorganic carbon only slightly influences this denitrifyingsystem, which still allows Paracoccus denitrificans to grow and denitrifywhen C/N=1. Denitrification occurs in the first 2 hours when hydrogen is deficient but stops after 2 hours. Nitrate removal rate is fastest under anoxic conditions, reduced by 50% when the oxygen partial pressure is at 2-20%, and seriously inhibited when the oxygen partial pressure is greater than 20%. Nitrate utilization also fits the Michaelis-Menten equation, with the maximum nitrate removal rate at 2.3 mg/day/mg dry cell and the half saturation constant at 76 mg-N/l. |
本系統中英文摘要資訊取自各篇刊載內容。