Cayford Barry I, Jiang Guangming, Keller Jurg, Tyson Gene, Bond Philip L
a Advanced Water Management Centre , The University of Queensland , St Lucia , Australia.
b Australian Centre for Ecogenomics , The University of Queensland , St Lucia , Australia.
Biofouling. 2017 Oct;33(9):780-792. doi: 10.1080/08927014.2017.1369050. Epub 2017 Sep 28.
This study investigated the variation in microbially induced concrete corrosion communities at different circumferential locations of a real sewer pipe and the effects of a wastewater flooding event on the community. Three distinct microbial community groups were found in different corrosion samples. The physico-chemical properties of the corrosion layers and the microbial communities were distinct for the cross-sectional positions within the pipe, ie ceiling, wall and tidal zones. The microbial communities detected from the same positions in the pipe were consistent over the length of the pipe, as well as being consistent between the replicate pipes. The dominating ceiling communities were members of the bacterial orders Rhodospirillales, Acidithiobacillales, Actinomycetales, Xanthomonadales and Acidobacteriales. The wall communities were composed of members of the Xanthomonadales, Hydrogenophilales, Chromatiales and Sphingobacteriales. The tidal zones were dominated by eight bacterial and one archaeal order, with the common physiological trait of anaerobic metabolism. Sewage flooding within the sewer system did not change the tidal and wall communities, although the corrosion communities in ceiling samples were notably different, becoming more similar to the wall and tidal samples. This suggests that sewage flooding has a significant impact on the corrosion community in sewers.
本研究调查了实际污水管道不同圆周位置处微生物诱导的混凝土腐蚀群落的变化，以及废水溢流事件对该群落的影响。在不同的腐蚀样本中发现了三个不同的微生物群落组。管道内不同横截面位置（即顶部、管壁和潮汐区）的腐蚀层物理化学性质和微生物群落各不相同。从管道相同位置检测到的微生物群落在管道长度范围内保持一致，并且在重复管道之间也保持一致。顶部的主要群落是红螺菌目、嗜酸菌目、放线菌目、黄单胞菌目和酸杆菌目的细菌成员。管壁群落由黄单胞菌目、嗜氢菌目、着色菌目和鞘脂杆菌目的成员组成。潮汐区由八个细菌目和一个古菌目主导，具有厌氧代谢这一共同生理特征。污水系统内的污水溢流并未改变潮汐区和管壁群落，尽管顶部样本中的腐蚀群落明显不同，变得更类似于管壁和潮汐区样本。这表明污水溢流对下水道中的腐蚀群落有重大影响。
