Department of Biomedical, Chemical, and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45220, United States.
Department of Mathematics and Natural Sciences, College of Arts and Sciences, Gulf University for Science and Technology, Hawally 32093, Kuwait.
Water Res. 2015 Dec 15;87:395-402. doi: 10.1016/j.watres.2015.09.024. Epub 2015 Sep 28.
Biotransformation of soybean biodiesel and the inhibitory effect of petrodiesel were studied under methanogenic conditions. Biodiesel removal efficiency of more than 95% was achieved in a chemostat with influent biodiesel concentrations up to 2.45 g/L. The kinetics of anaerobic biodegradation of soybean biodiesel B100 (biodiesel only) with different petrodiesel loads was studied using biomass pre-acclimated to B100 and B80 (80% biodiesel and 20% petrodiesel). The results indicated that the biodiesel fraction of the blend could be effectively biodegraded, whereas petrodiesel was not biodegraded at all under methanogenic conditions. The presence of petrodiesel in blends with biodiesel had a greater inhibitory effect on the rate of biodegradation than the biodegradation efficiency (defined as the efficiency of methane production). Both the biodegradation rate coefficient and the methane production efficiency increased almost linearly with the increasing fraction of biodiesel. With the increasing fraction of petrodiesel, the biodegradation rate and efficiency were correlated with the concentration of soluble FAMEs in the water.
在产甲烷条件下研究了大豆生物柴油的生物转化和石油柴油的抑制作用。在生物柴油浓度高达 2.45g/L 的恒化器中，生物柴油的去除效率超过 95%。使用预先适应 B100 和 B80（80%生物柴油和 20%石油柴油）的生物量研究了不同石油柴油负荷下大豆生物柴油 B100（仅生物柴油）的厌氧生物降解动力学。结果表明，在产甲烷条件下，生物柴油可以有效地生物降解，而石油柴油则根本不能生物降解。在生物柴油与石油柴油的混合物中，石油柴油对生物降解速率的抑制作用大于生物降解效率（定义为甲烷生成效率）。生物降解速率系数和甲烷生成效率几乎随生物柴油比例的增加呈线性增加。随着石油柴油比例的增加，生物降解速率和效率与水中可溶 FAMEs 的浓度相关。
