کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
622727 1455302 2016 9 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Inhibiting quorum sensing pathways to mitigate seawater desalination RO membrane biofouling
ترجمه فارسی عنوان
مهار مسیرهای سنجش قواموم برای کاهش تلفات زیست محیطی غوطه ور در آب شور
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی


• Quorum sensing inhibitors for membrane biofouling prevention were investigated.
• All biofouling bacteria examined secreted autoinducer I quorum sensing molecule.
• The quorum sensing inhibitor, vanillin reduced EPS on membrane surface by > 40%.

Bacterial biofilm formation, the main cause of membrane biofouling, is a crucial issue for membrane separation. Biofilm production is regulated by quorum sensing (QS) systems where bacteria secrete auto-inducers to communicate with neighboring bacteria. This research identified that several marine bacteria isolated from a desalination plant produced a low molecular weight auto-inducer 1 (AI-1) signaling molecule. AI-1 production in the mixed culture of the four different biofilm-forming marine bacteria was greater than in individual bacterial cultures. The QS inhibiting compounds, vanillin and cinnamaldehyde at 1200 mg/L significantly reduced biofilm formed by these marine bacteria by more than 79% and 70%, respectively in a microtiter plate assay. Anti-biofilm capabilities of vanillin and cinnamaldehyde were further assessed in a reverse osmosis membrane bio-monitoring system using mixed bacterial cultures and native uncultured bacterial communities in natural seawater. Confocal microscopy showed vanillin (1200 mg/L) significantly reduced biofilm extracellular polysaccharides and dead cells on the membrane surface (> 40%, > 20%). These results indicate that QS inhibitors have the potential to remediate membrane biofouling.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 393, 1 September 2016, Pages 135–143
نویسندگان
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