Ríos Francisco, Fernández-Arteaga Alejandro, Lechuga Manuela, Jurado Encarnación, Fernández-Serrano Mercedes
Department of Chemical Engineering, Faculty of Sciences, University of Granada, Campus Fuentenueva s/n, 18071, Granada, Spain.
Environ Sci Pollut Res Int. 2016 May;23(9):8286-93. doi: 10.1007/s11356-016-6129-z. Epub 2016 Jan 28.
This paper reports a study of the anaerobic biodegradation of non-ionic surfactants alkyl polyglucosides applying the method by measurement of the biogas production in digested sludge. Three alkyl polyglucosides with different length alkyl chain and degree of polymerization of the glucose units were tested. The influence of their structural parameters was evaluated, and the characteristics parameters of the anaerobic biodegradation were determined. Results show that alkyl polyglucosides, at the standard initial concentration of 100 mgC L(-1), are not completely biodegradable in anaerobic conditions because they inhibit the biogas production. The alkyl polyglucoside having the shortest alkyl chain showed the fastest biodegradability and reached the higher percentage of final mineralization. The anaerobic process was well adjusted to a pseudo first-order equation using the carbon produced as gas during the test; also, kinetics parameters and a global rate constant for all the involved metabolic process were determined. This modeling is helpful to evaluate the biodegradation or the persistence of alkyl polyglucosides under anaerobic conditions in the environment and in the wastewater treatment.
本文报道了一项关于非离子表面活性剂烷基多苷厌氧生物降解的研究，该研究采用了通过测量消化污泥中沼气产量的方法。测试了三种具有不同烷基链长度和葡萄糖单元聚合度的烷基多苷。评估了它们结构参数的影响，并确定了厌氧生物降解的特征参数。结果表明，在标准初始浓度为100 mgC L(-1)时，烷基多苷在厌氧条件下不能完全生物降解，因为它们会抑制沼气产生。具有最短烷基链的烷基多苷表现出最快的生物降解性，并达到了更高的最终矿化百分比。利用测试期间作为气体产生的碳，厌氧过程很好地符合伪一级方程；还确定了所有相关代谢过程的动力学参数和总速率常数。这种建模有助于评估烷基多苷在环境和废水处理中的厌氧条件下的生物降解或持久性。
