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研究生:陳宇陽
研究生(外文):Yu-Yain Chen
論文名稱:FENTON程序改善染整廢水有機物特性之研究
論文名稱(外文):Enhancing Organics Characteristics of Textile Wastewaters by Fenton Process
指導教授:康世芳康世芳引用關係
指導教授(外文):Shyh-Fang Kang
學位類別:碩士
校院名稱:淡江大學
系所名稱:水資源及環境工程學系
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:2001
畢業學年度:89
語文別:中文
論文頁數:94
中文關鍵詞:Fenton程序三價鐵混凝染整廢水分子量分布比攝氧率
外文關鍵詞:Fenton Processferric coagulationtextile wastewatermolecular weight distributionspecific oxygen uptake rate
相關次數:
  • 被引用被引用:25
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本研究以Fenton混凝和三價鐵混凝處理人工與實際染整廢水,以過氧化氫、鐵鹽加藥量及氧化時間為操作參數,實驗採瓶杯試驗來探討其去除COD、DOC、色度及處理後有機物特性。有機物特性評估項目為BOD/COD或COD/DOC比值、分子量分布及比攝氧率。研究結果顯示,Fenton混凝之COD與色度去除率皆優於三價鐵混凝,Fenton程序所產生氫氧自由基(·OH)可有效的氧化脫色,但實際廢水色度去除率遠低於人工染整廢水,推測原因為實際染整廢水混合多種染料。此外,延長氧化時間對於色度、COD、DOC及有機物特性並無明顯效果。因此,Fenton程序於氧化時間10分鐘即可達到良好處理效果。再者以單位鐵鹽COD和色度去除量而言,Fenton程序於亞鐵加藥量50 mg/L,其單位鐵鹽COD和色度去除量分別為7.1 mg/L-COD/mg/L-Fe2+和7.5 ADMI 單位/mg-Fe2+,約為三價鐵相同加藥量之3.7倍和1.5倍。Fenton混凝雖然無法礦化去除DOC,但·OH分解有機物可提高BOD/COD比值、比攝氧率和1KD以下低分子量有機物所佔比率,而可提高生物之分解能力。三價鐵混凝去除DOC以高分子量DOC(0.45mm-30K)為主,無法去除低分子量DOC,且BOD/COD和比攝氧率並無提高。綜合上述,Fenton程序於脫色、COD去除及轉化有機物為小分子量等效果皆優於三價鐵混凝,尤其低分子量DOC所佔比例提高,可促進後續生物單元分解利用,故Fenton程序可取代三價鐵混凝作為生物單元之前處理,可減少混凝劑加藥量與化學污泥產生量。
The Fenton regents and chemical coagulation process served to treat the synthetic and real dye wastewater respectively in this study. The parameters such as the dosage of the coagulant and Fenton reagent were varied during the experimental proceeding. All experiments were conducted in the jar-test. Experimental results were analyzed in terms of color and COD and DOC removal, BOD/COD(COD/DOC) ratio, molecular weight distribution(MW)and specific oxygen uptake rate.
Experimental results show that Fenton process is better than the chemical coagulation compared with their removal efficiency of color and COD. This can be attributed to the hydroxyl radicals (·OH) produced by Fenton reagents which oxidizing significantly colorful organic compounds in the dye wastewater. However, the removal of color for the real sample is much lower than that for artificial sample. This may be attributed to the complexity of dye in the real sample. The removal efficiency of color on the basis of ferrous and ferric irons dosage. Fenton process at concentration of 50 mg/L Fe2+, the removal efficiency of COD and color by Fenton process were 7.1 mg/L-COD/mg/L-Fe2+and 7.5 ADMI /mg-Fe2+, approximate at the same dosage of Fe3+ to 3.7 and 1.5 fold, respectively.
It is difficult to be mineralized DOC by Fenton process, but hydroxyl radicals oxidized organic compounds can increase BOD/COD ratio, specific oxygen uptake rate and molecular weight distribution. This indicates that Fenton process can enhance the biodegradation for the wastewater. The ferric coagulation mainly removes the DOC with high MW(0.45mm-30K) rather than that with low MW DOC(below 1KD).
Fenton process is better than ferric coagulation for degrading the color, COD and turns the DOC with high MW into that with low MW in the dye wastewater. Furthermore, it is concluded that ferric coagulation can replace with the Fenton process as a pre-treatment of textile wastewaters.
目 錄
目錄Ⅰ
圖目錄III
表目錄V
第一章 前言1
1-1 研究背景1
1-2 研究目的4
第二章 文獻回顧5
2-1 染整廢水特性及處理技術5
2-1-1 染整廢水特性5
2-1-2 染整廢水處理技術7
2-2 Fenton程序原理與影響因素10
2-2-1 Fenton 氧化原理10
2-2-2 鐵鹽混凝原理12
2-2-3 Fenton程序去除有機物之影響因素15
2-3 Fenton程序處理染整廢水 18
2-4 有機物特性評估24
2-4-1 BOD/COD、COD/DOC比值24
2-4-2 分子量分布26
2-4-3 比攝氧率28
第三章 實驗材料與方法29
3-1 實驗材料29
3-1-1 染整廢水29
3-1-2 實驗藥品與設備30
3-2 實驗方法32
3-2-1 化學混凝與Fenton程序之瓶杯試驗32
3-2-2 分子量分布33
3-2-3 比攝氧率35
3-2-4 水質分析36
第四章 結果與討論41
4-1 Fenton程序與三價鐵混凝處理染整廢水之比較41
4-1-1 鐵鹽加藥量對COD、DOC及色度去除之影響41
4-1-2 COD/DOC、BOD/COD比值之比較45
4-1-3 分子量分布之比較47
4-1-4 比攝氧率56
4-2 過氧化氫加藥量對Fenton程序處理染整廢水之影響60
4-2-1 過氧化氫加藥量對COD、DOC及色度去除之影響60
4-2-2 過氧化氫加藥量對COD/DOC、BOD/COD比值之影響64
4-2-3 過氧化氫加藥量分子量分布之影響67
4-2-4 比攝氧率73
4-3 氧化時間對Fenton程序處理染整廢水之影響76
4-3-1 氧化時間對COD、DOC及色度去除之影響76
4-3-2 氧化時間對分子量分布之影響79
4-3-3 比攝氧率82
4-4 Fenton程序與三價鐵混凝去除低分子量有機物之比較 84
4-4-1 去除低分子量有機物之比較84
4-4-2 Fenton程序作為前處理之綜合評估85
第五章 結論89
參考文獻90
附錄
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