基于乙二醇的I型飞机除冰液厌氧降解动力学
Kinetics of anaerobic degradation of glycol-based type I aircraft deicing fluids.
作者信息
Schoenberg T, Veltman S, Switzenbaum M
机构信息
Department of Civil and Environmental Engineering, University of Massachusetts, Amherst, USA.
出版信息
Biodegradation. 2001;12(1):59-68. doi: 10.1023/a:1011961214180.
The kinetics of anaerobic degradation of glycol-based Type I aircraft deicing fluids (ADFs) were characterized using suspended-growth fill-and-draw reactors. Both Type I ADFs tested showed near-complete anaerobic degradability. First-order degradation rate constants of 3.5 d(-1) for the propylene glycol-based Type I ADF and 5.2 d(-1) for the ethylene glycol-based Type I ADF were obtained through continuous-culture means under mesophilic conditions (35 degrees C). Fill-and-draw operation at lower temperatures affected anaerobic degradability only minimally down to 25 degrees C but substantially below 25 degrees C. High Type I ADF feed concentrations substantially affected degradability. Batch testing of fill-and-draw reactors resulted in first-order degradation rate constants of 1.9 d(-1) for propylene glycol-based Type I ADF and 3.5 d(-1) for ethylene glycol-based Type I ADF.
使用悬浮生长的填充-排水式反应器对基于二醇的I型飞机除冰液（ADF）的厌氧降解动力学进行了表征。所测试的两种I型ADF均显示出近乎完全的厌氧降解性。通过在中温条件（35℃）下的连续培养方法，获得了基于丙二醇的I型ADF的一级降解速率常数为3.5 d⁻¹，基于乙二醇的I型ADF的一级降解速率常数为5.2 d⁻¹。在较低温度下的填充-排水操作对厌氧降解性的影响最小，直至25℃，但在25℃以下则显著降低。高浓度的I型ADF进料对降解性有显著影响。填充-排水式反应器的批次测试得出，基于丙二醇的I型ADF的一级降解速率常数为1.9 d⁻¹，基于乙二醇的I型ADF的一级降解速率常数为3.5 d⁻¹。
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