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Biofilm Control With New Microparticles With Immobilized Biocide

机译：固定化杀菌剂的新型微粒对生物膜的控制

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摘要

Biofouling of heat exchangers, pipes, and valves isan unavoidable hazard in industrial plants. Operators have to face the problems of cleaning the fouled equipment, treating the wastewater from the discharge of antimicrobial cleaning agents (biocides, surfactants, etc.), and protecting the consumer from contamination risks. To tackle these problems, a targeted cleaning technique is here proposed that unites efficient removal of the biological deposits (specifically targeting the places where deposits grow) with low consumption of cleaning agents. The goal is to develop microparticles with functionalized surfaces that act as carriers ofbiocidal molecules, attach to biofilm surfaces, and deliver the biocide on the desired sites. This novel biofilm control technology may provide cost-effective, environmental- and health-friendly strategies that will improve operational efficacy. Previously, our group had performed studies with polystyrene (PS) microparticles functionalized with the biocide benzyldimethyldodecylammonium chloride (BDMDAC) against biofilms of Pseudomonas fluorescens. BDMDAC-functionalized microparticles were prepared using the layer-by-layer self-assembly (LBL) technique. Since PS particles are very expensive, our group tested calcium carbonate microparticles (CaCOj) (diameter: 3 iim), produced by the same LBL assembly technique. These microparticles have the advantage of being cheaper, porous, and highly abundant in nature. In this study, P. fluorescens biofilms were exposed to 6.33 mg/L and 11.75 mg/L of BDMDAC-coated CaCO3 microparticles for 60 min. This strategy promoted inactivation of 81.9% (6.33 mg/L) and 93.3 % (11.75 mg/L mg/L) of the total population. As a control, free BDMDAC was tested against P. fluorescens biofilms, demonstrating similar inactivation (p > 0.05) under the new strategy.
机译：热交换器，管道和阀门的生物污染是工业工厂中不可避免的危害。操作人员必须面对以下问题：清洁结垢的设备，处理排放的抗菌清洁剂（杀菌剂，表面活性剂等）产生的废水以及保护消费者免受污染的风险。为了解决这些问题，这里提出了一种有针对性的清洁技术，该技术结合了对生物沉积物的有效清除（特别针对沉积物生长的地方）和清洁剂的低消耗量。目的是开发具有功能化表面的微粒，该表面充当杀生物分子的载体，附着于生物膜表面，并将杀生物剂递送到所需位置。这种新颖的生物膜控制技术可以提供具有成本效益，对环境和健康有益的策略，从而提高操作效率。以前，我们的研究小组对抗荧光假单胞菌生物膜的聚苯乙烯（PS）微粒进行了杀菌剂苄基二甲基十二烷基氯化铵（BDMDAC）的功能化研究。使用逐层自组装（LBL）技术制备BDMDAC功能化的微粒。由于PS颗粒非常昂贵，因此我们小组测试了用相同的LBL组装技术生产的碳酸钙微粒（CaCOj）（直径：3mm）。这些微粒具有价格便宜，多孔且性质上高度丰富的优点。在这项研究中，荧光假单胞菌生物膜暴露于6.33 mg / L和11.75 mg / L的BDMDAC包被的CaCO3微粒中60分钟。该策略促进了总人口中81.9％（6.33 mg / L）和93.3％（11.75 mg / L mg / L）的失活。作为对照，针对荧光假单胞菌生物膜测试了游离的BDMDAC，表明在新策略下类似的灭活（p> 0.05）。

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  • 来源
    《Heat Transfer Engineering》 |2013年第9期|712-718|共7页
  • 作者

    CARLA FERREIRA; ANA M. PEREIRA; MARIA C. PEREIRA; MANUEL SIMOES; LUIS F. MELO;

  • 作者单位

    Departamento de Engenharia Qufmica, Universidade do Porto, Porto, Portugal;

    Departamento de Engenharia Qufmica, Universidade do Porto, Porto, Portugal;

    Departamento de Engenharia Qufmica, Universidade do Porto, Porto, Portugal;

    Departamento de Engenharia Qufmica, Universidade do Porto, Porto, Portugal;

    Address correspondence to Professor Luis F. Melo, Departamento de Engenharia Qufmica, Universidade do Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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