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題名 | Dynamic Process of Biosorption of Long-Chain Fatty Acids by Anaerobic Granular Sludge=厭氧顆粒污泥生物吸附長鏈脂肪酸的動力程序 |
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作者 | 胡慶祥; 曾四恭; Hwu, Ching-shyung; Tseng, Szu-kung; Lettinga,Gatze; |
期刊 | 弘光學報 |
出版日期 | 20000400 |
卷期 | 35 2000.04[民89.04] |
頁次 | 頁171-201 |
分類號 | 445.463 |
語文 | eng |
關鍵詞 | 生物吸附; 長鏈脂肪酸; 厭氧廢水處理; 脫附; 顆粒污泥; Biosorption; Long-chain fatty acids; Anaerobic wastewater treatment; Desorption; Granular sludge; |
中文摘要 | 本文使用厭氧顆粒污泥為吸附劑,探討長鏈脂肪酸的生物吸附動力特 性。等溫吸附試驗結果顯示,Freundlich模式最能充份描述油酸(oleicacid)在滅菌顆 粒污泥上的吸附行為。在使用未滅菌顆粒污泥作為吸附劑時,不論吸附質是油酸 或是模擬肉品廢水之長鏈脂肪酸混合物,試驗結果都相當一致:(1)脂肪酸初始濃 度愈高,生物吸附愈顯著,且生物分解抑制性愈大;(2)初始吸附後伴隨有低甲烷 產率的脫附,二次吸附後則發生無明顯脫附的高甲烷產率。而使用已滅菌顆粒污 泥作為吸附劑時,以及初始脂肪酸濃度過高(產生嚴重生物活性抑制)時,並不見 上述的脫附現象,因此我們認為,長鏈脂肪酸在厭氧顆粒污泥的脫附,完全景由 生物活性(甲烷化)所造成。 根據上述結果,我們除提出一套全新的吸附動力特性假說,藉以闡述這種生物吸 附作用外,也利用其高可逆反應特性,對含長鏈脂肪酸廢水的處理,提出反應器 設計上的建議。 |
英文摘要 | Biosorption of long-chain fatty acids (LCFA) by anaerobic granular sludge was investigated. Batch sorption experiments were conducted for characterization of the biosorption, using two active and one inactivated(autoclaved) anaerobic granular sludges as sorbents and with a single (oleic acid) or a mixture of LCFA (LCFAm; 50 oleic, 35 palmitic and 15 stearic acid) as sorbate. The LCFAm showed a faster rate and a larger amount of adsorption onto the granules than oleic acid. Adsorption was followed by desorption in sorption tests using the active sludge granules. Methane production increased significantly, simultaneously (at lower LCFA concentrations) or succeedingly (at higher concentrations) with the desorption. The desorption was mediated by biological activity, i.e., methanogenesis, since it did not occur with inactivated granules and became insignificant with active granules inhibited by LCFAm at higher concentrations. Increased LCFA concentrations resulted in a greater LCFA adsorption and more serious inhibition of their biodegradation. A dynamic process is proposed to explain the relationship between biosorption, desorption and biodegradation of LCFA by sludge granules. Isothermal studies with oleate showed that the apparent biosorption could be described by the physical multilayer adsorption theory and the sorption isotherm derived was consistent with the Freundlich model. |
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