Departamento de Genética, Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
Biofouling. 2021 Feb;37(2):246-256. doi: 10.1080/08927014.2021.1897790. Epub 2021 Mar 18.
Microfouling, ie biofilm formation on surfaces, can have an economic impact and requires costly maintenance in water-powered energy generation systems. In this study, the microbiota of a cooling system (filter and heat exchanger) in the Irapé hydroelectric power plant in Brazil was examined. The goal was to identify bacteria that could be targeted to more efficiently reduce biofilm formation. Two sampling campaigns were made corresponding to two well-defined seasons of the Brazilian Cerrado biome: the dry (campaign 1) and the wet (campaign 2). Microfouling communities varied considerably over time in samples obtained at different times after the last clearance of the heat exchanger. The thermophilic bacteria , and were exclusive and abundant in the microfouling of the heat exchanger in campaign 2, while methanotrophs and iron-reducing bacteria were abundant only in filter sediments. These findings could help to guide strategies for ecofriendly measures to reduce biofilm fouling in hydroelectric power plants, minimizing environmental and economic losses.
微生物附着（即在表面形成生物膜）会造成经济影响，需要在水力发电系统中进行昂贵的维护。在这项研究中，研究了巴西伊拉佩水电站冷却系统（过滤器和热交换器）中的微生物群。目的是确定可以针对减少生物膜形成的细菌。进行了两次采样活动，对应于巴西塞拉多生物群落的两个明确的季节：旱季（第 1 次采样）和雨季（第 2 次采样）。在最后一次清理热交换器后不同时间获得的样本中，微生物附着群落随时间变化很大。在第 2 次采样活动中，嗜热细菌、 和 是热交换器微生物附着的特有且丰富的细菌，而甲烷营养菌和铁还原菌仅在过滤器沉积物中丰富。这些发现可以帮助指导制定环保措施，以减少水力发电厂中的生物膜污染，最大程度地减少环境和经济损失。
