کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6364484 1623065 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biofouling control: Bacterial quorum quenching versus chlorination in membrane bioreactors
ترجمه فارسی عنوان
کنترل بیوفولین: رفع عصبی باکتریایی در برابر کلرسیون در بیوراکتورهای غشایی
کلمات کلیدی
بیوفولینگ، ارتباط سلولی، کلر زنی، خنک کننده قاومی، مولکول سیگنال،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


- Biofouling control is investigated with bacterial quorum quenching with chlorine dosing.
- Quorum quenching bacteria lead to the biofilm dispersal unachievable by chlorine alone.
- Chlorine injection has no negative impact to the bacterial quorum quenching activity.
- Quorum quenchers reduce biochemical precipitation and biopolymer release in the biofilm.
- Coupling quorum quenching and chlorination minimizes energy consumption.

Biofilm formation (biofouling) induced via cell-to-cell communication (quorum sensing) causes problems in membrane filtration processes. Chorine is one of the most common chemicals used to interfere with biofouling; however, biofouling control is challenging because it is a natural process. This study demonstrates biofouling control for submerged hollow fiber membranes in membrane bioreactors by means of bacterial quorum quenching (QQ) using Rhodococcus sp. BH4 with chemically enhanced backwashing. This is the first trial to bring QQ alongside chlorine injection into practice. A high chlorine dose (100 mg/L as Cl2) to the system is insufficient for preventing biofouling, but addition of the QQ bacterium is effective for disrupting biofouling that cannot be achieved by chlorination alone. QQ reduces the biologically induced metal precipitate and extracellular biopolymer levels in the biofilm, and biofouling is significantly delayed when QQ is applied in addition to chlorine dosing. QQ with chlorine injection gives synergistic effects on reducing physically and chemically reversible fouling resistances while saving substantial filtration energy. Manipulating microbial community functions with chemical treatment is an attractive tool for biofilm dispersal in membrane bioreactors.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 103, 15 October 2016, Pages 293-301
نویسندگان
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