Romeu Maria João, Morais João, Vasconcelos Vítor, Mergulhão Filipe
LEPABE-Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
ALiCE-Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
Antibiotics (Basel). 2023 Sep 16;12(9):1450. doi: 10.3390/antibiotics12091450.
Although a range of disinfecting formulations is commercially available, hydrogen peroxide is one of the safest chemical agents used for disinfection in aquatic environments. However, its effect on cyanobacterial biofilms is poorly investigated. In this work, biofilm formation by two filamentous cyanobacterial strains was evaluated over seven weeks on two surfaces commonly used in marine environments: glass and silicone-based paint (Sil-Ref) under controlled hydrodynamic conditions. After seven weeks, the biofilms were treated with a solution of hydrogen peroxide (HO) to assess if disinfection could affect long-term biofilm development. The cyanobacterial biofilms appeared to be tolerant to HO treatment, and two weeks after treatment, the biofilms that developed on glass by one of the strains presented higher biomass amounts than the untreated biofilms. This result emphasizes the need to correctly evaluate the efficiency of disinfection in cyanobacterial biofilms, including assessing the possible consequences of inefficient disinfection on the regrowth of these biofilms.
尽管市场上有一系列消毒制剂，但过氧化氢是用于水生环境消毒的最安全化学试剂之一。然而，其对蓝藻生物膜的影响研究较少。在这项工作中，在受控的水动力条件下，评估了两种丝状蓝藻菌株在海洋环境中常用的两种表面（玻璃和硅基涂料（Sil-Ref））上七周内的生物膜形成情况。七周后，用过氧化氢（HO）溶液处理生物膜，以评估消毒是否会影响生物膜的长期发展。蓝藻生物膜似乎对HO处理具有耐受性，处理两周后，其中一种菌株在玻璃上形成的生物膜比未处理的生物膜具有更高的生物量。这一结果强调了正确评估蓝藻生物膜消毒效率的必要性，包括评估低效消毒对这些生物膜再生的可能影响。
