活性碳流體與填充床染整廢水之催化氧化處理

賴振立(Cheng L. Lai)

指導教授 ： 林勝雄

元智大學/工程學院/化學工程與材料科學學系/碩士(1997年)

摘要

中文摘要
活性碳對液相中有機物有良好的吸附能力，有機物在活性碳表面也會產生
氧化作用。本實驗利用這個特點，以活性碳填充管柱通以臭氧加強氧化染
整廢水，並同時催化氧化及脫附活性碳表面的有機物，使活性碳可以重複
再利用。

本實驗以各種不同操作條件（活性碳添加量、臭氧曝氣流速、臭氧進口濃
度、氧化劑的添加量及原水污染物濃度），及實驗設計法探討各變因對處
理效果之影響，且各操作變數對實驗的處理效果互相干擾性小，同時污染
物(COD)去除率隨者活性碳添加量與氧化劑的添加量增加而增加，而利用
實驗設計法所求得的最佳條件下，COD可以去除到85.3%。

本實驗也證明反應過程中，活性碳有短暫的吸附作用，以及臭氧氧化活性
碳表面有機物使其脫附，即達到活性碳再生的功能，並以重複操作證明活
性碳填充床可以重複再利用。另外在催化氧化反應的前後，也同時考慮化
學混凝法處理，並比較其不同處理程序的效果。

在動力學方面，以指數反應動力學模式討論批次實驗中，COD去除過程的
一階多段反應，發現第一段是吸附作用，第二段是氧化分解作用，本研究
也觀察到，應用複式反應動力學模式，可以更適切的描述整個吸附/氧化
分解過程。

關鍵字

賴振立 ； 活性碳 ； 催化氧化 ； 臭氧 ； 染整廢水 ； 填充床 ； 動力學模式

並列摘要

Abstract
Past researches have shown that both adsorption and chemical
reaction
can occur simultaneously on the surfaces of granular activated
carbon (GAC).
The present research attempts to enhance the simultaneous
surface adsorption
and chemical oxidation of GAC by using ozone in a fixed or
fluidized-bed adsorption process.

Control variables employed in the experimental investigations included
the amount of GAC, ozone gas flow rate, inlet ozone concentration and pollutant
concentration. Method of experimental design was employed to determine the
optimal experimental conditions of the operating variables. The results indicated
that the interplay effect of the operating variables on the pollutant (COD)
removal is minimum. A maximum COD at 85.3% was achieved under the
operating conditions.
Test results also revealed that a short period of GAC adsorption exists
before ozonation causes significant oxidation of pollutant on the GAC surfaces.
Such an ozone enhanced oxidation effected an excellent regeneration of GAC
and enabled GAC reuse. Also considered was the effect chemical coagulation on
the COD removal of the ozone oxidation process.
Kinetic studies using the observed data also showed that a short period of
rapid adsorption preceded chemical oxidation caused by ozonation, However,
the combined GAC adsorption and chemical oxidation could be faithfully
described by a generalized kinetic model.

並列關鍵字

HASH(0xde92ee4)

參考文獻

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