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Evaluation of Sulfate-Reducing Bacteria Biofilms in the Presence of Biocides

机译：杀菌剂存在下硫酸盐还原菌生物膜的评价

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The aim of this study was to evaluate the progression of sulfate-reducing bacteria (SRB) biofilms in the presence of biocides simultaneously with bacterial growth and some electrochemical parameters. Hence, a laboratory system was designed to observe directly the progression of sulfate-reducing biofilms in a flow cell, with the action of two biocides: a commercial product (CB), based on tetrakis-hydroximethyl phosphonium sulfate (THPS), and another formulated from the leaves of the Neem tree (Azadirachta indica), which has been claimed to have antimicrobial properties. At the same time, open circuit potential (OCP) and linear polarization resistance (LPR) of carbon steel electrodes were measured. Potentiodynamic polarization (Tafel) and mass loss techniques were determined at the end of the tests, as well as sessile growth. This paper shows the correlation of each parameter evaluated for each biocide. The results confirm that the natural product based on A. indica presented a similar behavior to that of CB. This demonstrates a potential for using this plant as an environmentally friendly biocide. Further research is required to assess its possible application at an industrial level.
机译：这项研究的目的是评估在有杀生物剂存在的同时，细菌生长和某些电化学参数的同时，硫酸盐还原细菌（SRB）生物膜的进程。因此，设计了一个实验室系统，以在两种杀菌剂的作用下直接观察流通池中硫酸盐还原生物膜的进程：两种基于四氢-羟甲基甲基methyl硫酸盐（THPS）的商业产品（CB），以及另一种来自印度em树（印za树）的叶子，据称具有抗菌特性。同时，测量了碳钢电极的开路电势（OCP）和线性极化电阻（LPR）。在测试结束时确定了动电位极化（Tafel）和质量损失技术，以及无柄生长。本文显示了每种杀菌剂评估的每个参数的相关性。结果证实，基于印度曲霉的天然产物表现出与CB相似的行为。这证明了将该植物用作环境友好的杀菌剂的潜力。需要进一步研究以评估其在工业水平上的可能应用。

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