a LBE, Univ Montpellier, INRA , Narbonne , France.
b IRSTEA, UMR G-EAU, University of Montpellier , Montpellier , France.
Biofouling. 2019 Feb;35(2):217-229. doi: 10.1080/08927014.2019.1591377. Epub 2019 Apr 2.
Clogging of drippers due to the development of biofilms weakens the advantages and impedes the implementation of drip irrigation technology. The objective of this study was to characterise the bacterial community of biofilms that develop in a drip irrigation system supplied with treated wastewater. High-throughput sequencing of 16S rRNA gene amplicons indicated that the bacterial community composition differed between drippers and pipes, mainly due to changes in the abundance of the genus Aquabacterium. Cyanobacteria were found to be involved in the biological fouling of drippers. Moreover, bacterial genera including opportunistic pathogenic bacteria such as Legionella and Pseudomonas were more abundant in dripper and pipe biofilms than in the incoming water. Some genera such as Pseudomonas were mostly recovered from drippers, while others (ie Bacillus, Brevundimonas) mainly occurred in pipes. Variations in the hydraulic conditions and properties of the materials likely explain the shift in bacterial communities observed between pipes and drippers.
滴头堵塞是由于生物膜的发展削弱了滴灌技术的优势并阻碍了其实施。本研究的目的是对用处理后的废水灌溉的滴灌系统中生物膜的细菌群落进行特征描述。16S rRNA 基因扩增子高通量测序表明，滴头和管道中的细菌群落组成存在差异，主要是由于 Aquabacterium 属丰度的变化。发现蓝藻参与了滴头的生物结垢。此外，与进水中相比，在滴头和管道生物膜中发现了包括军团菌和铜绿假单胞菌等机会致病菌属的细菌。一些属，如假单胞菌，主要从滴头中回收，而其他属（如芽孢杆菌、短小芽孢杆菌）主要出现在管道中。水力条件和材料特性的变化可能解释了在管道和滴头之间观察到的细菌群落的变化。
