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題 名 | Effects of Return Sludge Ratio on Nitrogen Removal in a Modified DEPHANOX Process=改良DEPHANOX程序中迴流污泥比對氮去除所造成的影響 |
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作 者 | Jun,Hang-bae; Lee,Sang-hyung; Nam,Se-yong; Shin,Hang-sik; | 書刊名 | 中國環境工程學刊 |
卷 期 | 8:4 1998.12[民87.12] |
頁 次 | 頁275-281 |
分類號 | 445.463 |
關鍵詞 | 改良DEPHANOX; 硝化; 脫硝; Modified DEPHANOX process; Nitrification; Denitrification; Sludge sending rate; |
語 文 | 英文(English) |
中文摘要 | 增進脫硝程序中的脫硝效率,最有效的是添加額外的有機質,如甲醇及各種發酵 物質。 但是在技術上及經濟面的考量是建議使用進流水中的有機質。 Modified DEPHA NOX 程序是使用來去除含低 COD/TKN 廢水中的氮。 在此程序中,被儲存進流水中的 TCOD 當作 去氮的碳源。 Modified DEPHANOX 程序包括一個接觸槽 (停留時間 0.5 小時 )、一個分離 槽 (停留時間 0.5 小時 )、 一個硝化槽 (停留時間 3 小時 )、 一個脫硝槽 (停留時間 3 小時 )、一個後曝氣槽 (停留時間 1 小時 )、一個沈降槽。 乾季時,經一厭氧接觸槽 (停 留時間為 0.5 小時 ),進流水中大約有 50 % -60 %的 TCOD 被分離出來。硝化效率可高 達 80 % -90 %,和季節性進流水中波動的 COD 沒有關係。汙泥迴流率增加到 50 %時, 被吸附在活性汙泥上的 TCOD 從 2.6 克╱天增加到 4.5 克╱天, 汙泥的吸收附率從 0.08g-TCOD/g-MLSS 降到 0.03g-TCOD/g-MLSS。TCOD 的分離效率為 62 %,在迴流率為 50 %時,T-N 的去除效率為 73 %。去除 1 克硝酸鹽所需要的 COD 總量為 10.06g。 |
英文摘要 | The best way to enhance denitrification efficiency is to supply external organic compounds, such as methanol and various fermented matters, for denitrification purposes. However, use of influent organic matter is suggested for denitrification in technical and economical aspects. A modified DEPHANOX process was was studied for nitrogen removal from sewage having low COD/TKN ratio. In this process, preserved influent TCOD was supplied as a carbon source for denitrification. The modified DEPHANOX process was composed of a contactor (0.5hr), separator (0.5hr), nitrification reactor (3hr), denitrification reactor (3hr), post-aeration reactor (1hr), and settler. 50%-60% of the influent TCOD could be separated in 0.5-hour anaerobic contact during a dry season. Nitrification efficiency was as high as 80% to 90%, independently of seasonal fluctuation of COD. The TCOD sorption equivalents decreased from 0.08 to 0.03 g-TCOD/g-MLSS, while the amount of TCOD sorbed on the activated sludge flocs increased from 2.6 g/day to 4.5 g/day with an increase in the sludge return ratio up to 50%. The separation efficiency of TCOD was 62%, while the average T-N removal efficiency was 73% at $=50%. The ratio of total amount of COD required for denitrifying 1 g of nitrate was 10.06. |
本系統中英文摘要資訊取自各篇刊載內容。