کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
636963 | 883670 | 2010 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modification of membrane surface for anti-biofouling performance: Effect of anti-adhesion and anti-bacteria approaches
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Modification of membrane surface for anti-biofouling performance: Effect of anti-adhesion and anti-bacteria approaches Modification of membrane surface for anti-biofouling performance: Effect of anti-adhesion and anti-bacteria approaches](/preview/png/636963.png)
چکیده انگلیسی
Membrane biofouling refers to the undesirable accumulation (attachment and growth) of microorganisms on a membrane surface, and has been a major problem in the application of membrane technology in water and wastewater treatment. In this study, the surface of a base membrane made of chitosan/cellulose acetate blend was modified by reacting with heparin, quaternary ammonium or being immobilized with silver ions. The purpose of the modifications was to increase the surface hydrophilicity, alter the surface charge property or endue the surface with anti-bacteria function. The modified membranes were then examined for their anti-biofouling performance in terms of the anti-adhesion and anti-bacteria effects, with Escherichia coli pure culture and mixed culture bacteria in a bioreactor that simulated the activated sludge wastewater treatment process. The results clearly show that the hydrophilicity of a membrane, although important, is not an effective indicator for the tendency of membrane biofouling but the nature of the surface charges of the membrane also plays a very important role. It was found that the anti-adhesion approach that prevents the initial attachment of bacteria on a membrane surface is a more effective method than the anti-bacteria approach that aims at killing bacteria already attached on the membrane surface. The best performance for minimizing membrane biofouling has, however, been realized through a modified membrane surface that has effective anti-adhesion property plus additional anti-bacteria function, with the latter as a safe guard in case some bacteria do attach to the surface of a membrane.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 346, Issue 1, 1 January 2010, Pages 121-130
Journal: Journal of Membrane Science - Volume 346, Issue 1, 1 January 2010, Pages 121-130
نویسندگان
C.X. Liu, D.R. Zhang, Yi He, X.S. Zhao, Renbi Bai,