Abstract Characterization of the biofilm growing on stainless steel (SS) in untreated (UTUWW) and treated (TUWW) urban wastewaters was performed. In both media, the first phase of biofilm growth was aerobic, when the genera Caldimonas, Caulobacter, Terriglobus and Edaphobacter (iron oxidizing bacteria [IOB]) and the genera Bacillus, Sulfurimonas, Syntrophobacter and Desulfobacter (sulfur oxidizing bacteria [SOB]) were identified. In the second phase, established after immersion for 7 days, the high amount of EPS inhibited the access of oxygen and promoted the growth of anaerobic bacteria, which were the genus Shewanella (iron-reducing bacterium [IRB]) and the genera Desulfovirga, Desulfovibrio, Desulfuromusa, Desulfococcus, and Desulfosarcina (sulfate-reducing bacteria [SRB]). Electrochemical measurements showed that in the first stage, the aerobic bacteria and the high amount of EPS delayed the cathodic reduction of oxygen. However, in the second stage, EPS and the anaerobic bacteria promoted anodic dissolution.

中文翻译：

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城市废水中 304L 不锈钢上生长的生物膜的表征：细胞外聚合物 (EPS) 和细菌聚生体

摘要 对未处理 (UTUWW) 和已处理 (TUWW) 城市废水中不锈钢 (SS) 上生长的生物膜进行了表征。在这两种培养基中，生物膜生长的第一阶段是有氧的，此时 Caldimonas、Caulobacter、Terriglobus 和 Edaphobacter 属（铁氧化细菌 [IOB]）和芽孢杆菌属、Sulfurimonas、Syntrophobacter 和 Desulfobacter（硫氧化细菌 [SOB]）确定。在浸泡 7 天后建立的第二阶段，大量 EPS 抑制了氧气的进入并促进了厌氧菌的生长，这些细菌是 Shewanella 属（铁还原菌 [IRB]）和 Desulfovirga、Desulfovibrio 属, Desulfuromusa, Desulfococcus, 和 Desulfosarcina (硫酸盐还原菌 [SRB])。电化学测量表明，在第一阶段，好氧细菌和大量 EPS 延迟了氧气的阴极还原。然而，在第二阶段，EPS和厌氧菌促进了阳极溶解。