Technical University of Lodz, Institute of Fermentation Technology and Microbiology, Wolczanska 171/173, 90-924 Lodz, Poland.
J Biosci Bioeng. 2013 Jan;115(1):71-5. doi: 10.1016/j.jbiosc.2012.08.002. Epub 2012 Aug 25.
The aim of this study was to estimate the biodegradability of the selected imidazolium ionic liquids and to determine the kinetic parameters for the biological treatment of wastewater containing these ionic liquids. Biodegradability was evaluated with the help of the Organisation for Economic Co-operation and Development (OECD) tests, while oxygen uptake rate (OUR) tests were made in order to calculate the values of Monod kinetic parameters. The results obtained from both types of the tests showed that ionic liquids of chemical structure of 1-alkyl-3-methyl imidazolium bromide were poorly biodegradable and co-biodegradable compounds, although their biodegradability increased with the elongation of the alkyl chain length. At the same time the presence of the imidazolium-based ionic liquids in wastewater at concentration of 50 mg l(-1) did not inhibit biomass growth as well as did not decrease the affinity of substrate to biomass. The values of both Monod kinetic parameters, i.e., maximum specific growth rate (μ(max)) and half saturation constant (K(S)), increased with the increase in chain length of the alkyl substituent.
本研究旨在评估所选的咪唑鎓离子液体的可生物降解性，并确定含有这些离子液体的废水的生物处理动力学参数。采用经济合作与发展组织（OECD）的测试来评估可生物降解性，同时进行耗氧速率（OUR）测试以计算 Monod 动力学参数的值。两种类型的测试结果均表明，化学结构为 1-烷基-3-甲基咪唑溴盐的离子液体可生物降解性较差，是共生物降解化合物，但其可生物降解性随烷基链长度的延长而增加。同时，在 50mg/L 的离子液体浓度存在于废水中时，既不会抑制生物量的生长，也不会降低基质对生物量的亲和力。Monod 动力学参数的两个值，即最大比生长速率（μ(max)）和半饱和常数（K(S)），均随烷基取代基链长的增加而增加。
