頁籤選單縮合
| 題 名 | 薄膜蒸餾技術應用在中鋼煉焦廢水氨氮脫除之可行性研究=Application of Membrane Distillation to Remove Ammonia from Coking Wastewater in China Steel Corporation |
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| 作 者 | 林伯勳; 葉茂淞; 洪仁陽; 徐淑芳; | 書刊名 | 鑛冶 |
| 卷 期 | 59:2=230 2015.06[民104.06] |
| 頁 次 | 頁108-119 |
| 分類號 | 445.461 |
| 關鍵詞 | 煉焦廢水; 薄膜蒸餾; Coking wastewater; Membrane distillation; PTFE; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 106 年 12 月 31 日起環保署將針對化 工業施行放流水氨氮排放管制,其限值 為 20 mg/L。中鋼放流水氨氮約 80~90% 來自於煉焦廢水,中鋼未來將使用生物 處理程序進行氨氮脫除,但因進流煉焦 廢水之氨氮濃度過高,須以物化法進行 前處理,因此協同工研院開發薄膜蒸 餾技術 (MD),分離並移除煉焦廢水之 氨氮。本研究以實驗室試驗評估 PP 及 PTFE 兩種材質薄膜、水及硫酸兩種氨吸 收劑,並將 MD 處理後之氨氮濃度目標 訂為< 300 mg/L。研究結果顯示 PTFE 較 PP 膜適用於直接接觸式 MD (DCMD) 來進行煉焦廢水氨氮分離;而對於煉焦 廢水所含之氨氮濃度 ( 平均 ~650 mg/L), 硫酸較水更適合做為氨氮之吸收劑。 以 PTFE 為 DCMD 模組配合硫酸為氨氮 的吸收劑,在煉焦廢水 pH 值 10.5~11.5 時,其吸收通量約為 1.7 g-N/m2 .hr,並 可將廢水中之氨氮處理至< 300 mg/L。 此外,將 DCMD 分離氨氮所產生之硫酸 銨,再以真空式 MD (VMD) 配合冰水為 吸收劑進行氮氨分離,可產生至少 3% 的氨水做為回收利用。 |
| 英文摘要 | China Steel Corporation (CSC) has to keep the ammonia nitrogen (NH3-N) concentration in the wastewater under 20 mg N/L before disposal. Eighty to 90% of NH3 in CSC wastewater effluent is from the coking wastewater that will be treated by a biological process. However the NH3 concentration (>300 mg N/L) in the coking wastewater is too high for the biological treatment. Thus, CSC cooperated with the Industrial Technology Research Institute (ITRI) to develop a membrane distillation (MD) technique to reduce the coking wastewater NH3 concentration to less than 300 mg N/L. The objectives of this study are to evaluate different membrane materials and receiving solutions for the MD treatment to reduce NH3 concentration of coking wastewater to less than 300 mg N/L and to recover ammonia solution for reuse. Our experimental results showed that the PTFE hollow fiber MD module using sulfuric acid as a receiving solution can achieve a receiving flux of 1.7 g-N/m2 .hr and remove NH3 in the coking wastewater to less than 300 mg N/L. The NH3 in the converted ammonium sulfate ((NH4)2SO4) was then recovered by vacuum membrane distillation (VMD) using ice water as the receiving solution to produce 3% ammonia solution. |
本系統中英文摘要資訊取自各篇刊載內容。