Ellegaard-Jensen Lea, Horemans Benjamin, Raes Bart, Aamand Jens, Hansen Lars Hestbjerg
Department of Environmental Science, Aarhus University, Frederiksborgvej 399, 4000, Roskilde, Denmark.
KU Leuven, Department of Earth and Environmental Sciences, Kasteelpark Arenberg 20, 3001, Heverlee, Belgium.
Appl Microbiol Biotechnol. 2017 Jul;101(13):5235-5245. doi: 10.1007/s00253-017-8362-x. Epub 2017 Jun 14.
The pesticide metabolite 2,6-dichlorobenzamide (BAM) is very persistent in both soil and groundwater and has become one of the most frequently detected groundwater micropollutants. BAM is not removed by the physico-chemical treatment techniques currently used in drinking water treatment plants (DWTP); therefore, if concentrations exceed the legal threshold limit, it represents a sizeable problem for the stability and quality of drinking water production, especially in places that depend on groundwater for drinking water. Bioremediation is suggested as a valuable strategy for removing BAM from groundwater by deploying dedicated BAM-degrading bacteria in DWTP sand filters. Only a few bacterial strains with the capability to degrade BAM have been isolated, and of these, only three isolates belonging to the Aminobacter genus are able to mineralise BAM. Considerable effort has been made to elucidate degradation pathways, kinetics and degrader genes, and research has recently been presented on the application of strain Aminobacter sp. MSH1 for the purification of BAM-contaminated water. The aim of the present review was to provide insight into the issue of BAM contamination and to report on the current status and knowledge with regard to the application of microorganisms for purification of BAM-contaminated water resources. This paper discusses the prospects and challenges for bioaugmentation of DWTP sand filters with specific BAM-degrading bacteria and identifies relevant perspectives for future research.
农药代谢物2,6 - 二氯苯甲酰胺（BAM）在土壤和地下水中都具有很强的持久性，已成为最常被检测到的地下水微污染物之一。目前饮用水处理厂（DWTP）所采用的物理化学处理技术无法去除BAM；因此，如果其浓度超过法定阈值限制，对于饮用水生产的稳定性和质量而言，这将是一个相当大的问题，尤其是在依赖地下水作为饮用水源的地方。通过在DWTP砂滤池中部署专门降解BAM的细菌，生物修复被认为是从地下水中去除BAM的一种有价值的策略。目前仅分离出少数几种具有降解BAM能力的细菌菌株，其中只有三株属于氨基杆菌属的菌株能够将BAM矿化。人们已付出相当大的努力来阐明降解途径、动力学和降解基因，并且最近已有关于菌株氨基杆菌属MSH1在净化受BAM污染水体方面应用的研究报道。本综述的目的是深入了解BAM污染问题，并报告微生物在净化受BAM污染水资源方面的应用现状和相关知识。本文讨论了用特定降解BAM的细菌对DWTP砂滤池进行生物强化的前景和挑战，并确定了未来研究的相关方向。
