Strategic Water Infrastructure Lab, School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia.
Strategic Water Infrastructure Lab, School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia.
Bioresour Technol. 2018 Jan;247:528-536. doi: 10.1016/j.biortech.2017.09.129. Epub 2017 Sep 20.
Laccase-catalyzed degradation of a broad spectrum of trace organic contaminants (TrOCs) by a membrane distillation (MD)-enzymatic membrane bioreactor (EMBR) was investigated. The MD component effectively retained TrOCs (94-99%) in the EMBR, facilitating their continuous biocatalytic degradation. Notably, the extent of TrOC degradation was strongly influenced by their molecular properties. A significant degradation (above 90%) of TrOCs containing strong electron donating functional groups (e.g., hydroxyl and amine groups) was achieved, while a moderate removal was observed for TrOCs containing electron withdrawing functional groups (e.g., amide and halogen groups). Separate addition of two redox-mediators, namely syringaldehyde and violuric acid, further improved TrOC degradation by laccase. However, a mixture of both showed a reduced performance for a few pharmaceuticals such as primidone, carbamazepine and ibuprofen. Mediator addition increased the toxicity of the media in the enzymatic bioreactor, but the membrane permeate (i.e., final effluent) was non-toxic, suggesting an added advantage of coupling MD with EMBR.
采用膜蒸馏（MD）-酶膜生物反应器（EMBR）研究了漆酶催化降解多种痕量有机污染物（TrOCs）。MD 组件有效地将 TrOCs（94-99%）保留在 EMBR 中，有利于它们的连续生物催化降解。值得注意的是，TrOC 的降解程度强烈受到其分子特性的影响。含有强供电子官能团（如羟基和胺基）的 TrOCs 得到了显著降解（超过 90%），而含有吸电子官能团（如酰胺和卤素基团）的 TrOCs 则得到了适度去除。分别添加两种氧化还原介体，即丁香醛和尿囊素，进一步提高了漆酶对 TrOC 的降解。然而，对于几种药物，如扑米酮、卡马西平和布洛芬，两者的混合物表现出降低的性能。介体的添加增加了酶生物反应器中介质的毒性，但膜渗透物（即最终流出物）是无毒的，这表明将 MD 与 EMBR 耦合具有额外的优势。
