膜生物反应器去除废水中阴离子表面活性剂的研究

阴离子表面活性剂是环境中分布广泛且具有代表性的一类有机污染物.采用分置式膜生物反应器(MBR)进行去除模拟废水中阴离子表面活性荆(LAS)的实验,结果表明:MBR对阴离子表面活性荆的去除率高于90%.同时考察了阴离子表面活性荆生物降解的影响因素,确定其适宜降解条件为:气体流量为0.3m3/h、活性污泥浓度为6948mg/L.初步探讨了降解动力学和降解机理,研究表明对阴离子表面活性剂的去除符合拟一级反应动力学过程,且生物降解对其去除起主要作用.

Removal of Anionic Surfactants in Wastewater by Membrane Bioreactor

Anionic surfactant is a kind of most familiar and representational organic contaminations in environment. Using separation membrane bioreactor(MBR)can achieve effective removal of anionic surfactants in simulant wastewater, the result demonstrated that the removal efficiency exceeded 90% . Several factors influencing anionic surfactants biodegradation were investigated, the optimum conditions were confirmed; flux of gas =0. 3m /h, the activated sludge concentration = 6948mg/L. Tests were carried out to study the anionic surfactants removal approaches of MBR, it is concluded that biological effects play a major role in anionic surfactants removal by MBR. Meanwhile, biodegradation kinetics of anionic surfactants was analyzed, it is found that biodegradation of anionic surfactants follows first-order dynamics.