- 學位論文
生物膜反應槽中利用燃煤飛灰為附著介質處理反應性染料之動力研究
Kinetic Study of Treatment of Reactive Dye Using Coal Fly Ash as a Supporting Medium in a Biofilm Reactor
摘要
生物膜動力模式系統的推導包括反應黑5-Reactive Black 5(RB5)在飛灰顆粒內表面擴散，液相和生物膜介面之質傳莫爾生物降解動力模式，以燃煤飛灰為介質之固定生物膜反應槽處理反應性染料的機制包括吸附作用及生物降解作用。 本研究主要建立實驗室級染料分解菌Funalia trogii (F. trogii)附著於燃煤飛灰介質之生物膜處理程序以去除廢水中反應性染料-RB5之濃度並推導動力模式系統。瓶杯試驗推求染料分解菌F. trogii的生物動力參數，所推求污泥生長係數(Y)值為0.525 mg cell/mg RB5、F. trogii微生物最大比生長率(mm)為7.256 day-1、F. trogi 微生物最大比基質利用率13.82 mg RB5/mg cell-day、RB5 的半飽和常數(Ks)為0.28 mg RB5/L、F. trogii 微生物衰亡係數(b)值為0.0568 day-1、質傳系數經過方程式計算，液相分子擴散係數(Df)為0.169 cm2/day、液相和生物膜質傳系數(kf)為237.4 cm2/day、F. trogii 生物膜脫落係數(bs)為0.430 day-1。RB5 在飛灰顆粒內表面擴散係數(Ds)=3.1x10-4 cm2/day。亦藉由瓶杯試驗來推得飛灰Langmuir 等溫吸附曲線之吸附容量參數(qm)為0.77 (mg/g)，吸附密度參數(Ka)為9.58×10-3 (L/mg)。連續性完全混合式生物反應槽體積為7 公升，RB5 染料進流量為每天20 公升，水力停留時間維持8.4 小時。固定生物膜和懸浮性染料分解菌F. trogii 達到最大生長速率之穩定狀態時RB5 染料的去除率約為42 %。 結果顯示出流水的RB5 染料濃度與懸浮菌的實驗數據動力模式值互相符合。此研究的實驗方法和動力模式系統可作為利用燃煤飛灰為附著介質之生物膜反應槽實廠化放大設計的依據，來達到燃煤飛灰應用於廢水處理之廢棄物資源回收再利用的目的。
並列摘要
The mechanisms of fixed-biofilm kinetic model included the surface diffusion of reactive black 5 on fly ash particles, mass transfer in liquid / biofilm interface, and Monod kinetics. The mechanisms to remove reactive dye were adsorption and biodegrdation in fixed-biofilm reactor using fly-ash as a supporting medium. In this study, a laboratory-scale fixed biofilm reactor using fly ash particles as supporting media was setup to treat reactive dyes (reactive black 5) for decolorization and the kinetic model system was developed. The batch tests were used to determine biokinetic parameters. The yield coefficient (Y) was 0.525 mg cell/mg RB5. The Funalia trogii (F.trogii) cells specific growth rate (mm) was 7.256 day-1. The maximum specific utilization rate was 13.82 mg RB5/mg cell-day. The half-saturation constant (Ks) was 0.28 mg RB5/L. The decay coefficient of F. trogii cells (b) was 0.0568 day-1. The diffusion coefficient of RB5 (Df) obtained from empirical formula was 0.169 cm2/day. The mass transfer coefficient in the liquid/biofilm interface was 237.4 cm2/day. The Langmuir adsorption isotherm obtained from the batch kinetic tests to determine adsorption amount parameter (qm) and (Ka), which was 0.77 (mg/g) and 9.58x10-3 (L/mg), respectively. The working volume of completely-mixed biofilm reactor was 7 L. The flow rate of influent was 20 L, which yield the hydraulic retention time was 8.4 h. The removal efficiency of RB5 was about 42% when the F. trogii cells reached a maximum growth phase. The experimental results showed a good agreement with model simulation. The approaches of experiment and modeling can be applied to scale-up the fixed-biofilm reactor using fly-ash as a supporting medium to treat reactive dyes, which achieves the purpose of reclamation of coal fly ash.